Barrels

Barrels

 

Discover premium HK barrels and parts for your firearms. Our bestselling selection includes replacement barrels, custom barrels, precision barrels, and tactical barrels, all crafted to meet the highest standards. Whether you need stainless steel barrels, threaded barrels, pistol barrels, rifle barrels, or submachine gun barrels, we have the ideal upgrade for you. Enhance your HK rifle or pistol with high-performance, aftermarket, and competition barrels. Shop now for OEM barrels and accessories to elevate your shooting experience with unparalleled quality and reliability.

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  • H&K HK .45 ACP Pistols Barrel O-Ring - Green H&K HK .45 ACP Pistols Barrel O-Ring - Green

    H&K HK .45 ACP Pistols Barrel O-Ring - Green

    H&K Heckler & Koch

    $4.95
    HK .45 ACP Pistols Barrel O-Ring - Green Get them while you can, as they are no longer available in green. The green o-rings were used when HK introduced o-rings on the Mark 23 and USP 45 Tactical HK pistols. All HK O-rings are made of the same material...
    HKP-01984
    $4.95
    Qty in Cart: 0
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    $4.95
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  • HK/Walther/Colt .22LR Threaded Barrel Adapter - Converts 8x.75 To 1/2x28 HK/Walther/Colt .22LR Threaded Barrel Adapter - Converts 8x.75 To 1/2x28

    HK/Walther/Colt .22LR Threaded Barrel Adapter - Converts 8x.75 To 1/2x28

    USA

    $29.95
    HK/Walther/Colt .22LR Threaded Barrel Adapter - Converts 8x.75 To 1/2x28 This custom adapter allows you to easily convert your .22LR barrel from 8x.75 to 1/2x28 threads. It replaces the stock flash hider and provides a secure, permanent mounting option...
    HKP-01845
    $29.95
    Qty in Cart: 0
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    $29.95
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  • H&K Barrel Retaining Pin - 5mm Standard Size H&K Barrel Retaining Pin - 5mm Standard Size

    H&K Barrel Retaining Pin - 5mm Standard Size

    H&K Heckler & Koch

    $9.95
    H&K Barrel Retaining Pin - 5mm Standard Size Each barrel pin is used for installing a new or replacement barrel. HK suggest using a new factory barrel pin when installing or reinstalling a HK barrel. We also offer the HK oversized barrel pins for...
    HKP-00071
    $9.95
    Qty in Cart: 0
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    $9.95
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  • HKP HK .45 Barrel O-Ring All Caliber Pistols - Red HKP HK .45 Barrel O-Ring All Caliber Pistols - Red

    HKP HK .45 Barrel O-Ring All Caliber Pistols - Red

    HKP HK Parts

    $4.95
    HKP HK .45 Barrel O-Ring All Caliber Pistols - Red A rare find as we have found a small lot of HK red-colored HK .45 O-rings.  All HK O-rings are still made of the same material as the newer black O- rings only in the HK red color. A great spare and...
    HKP-19316
    $4.95
    Qty in Cart: 0
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    $4.95
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  • HK 9mm Barrel O-Ring For Thread Protector - Green

    HK 9mm Barrel O-Ring For Thread Protector - Green

    H&K Heckler & Koch

    $4.95
    HK German 9mm barrel O-ring - Green For thread protector or barrel slot on the Elite barrel. The o-ring is a high wear and replacement item. Stock up at the lowest price in the country. To save even more order 10 or more and get an additional $1 off per...
    HKP-19729
    $4.95
    Qty in Cart: 0
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    $4.95
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  • HK, Walther, Colt, .22LR Barrel Adapter O-Ring HK, Walther, Colt, .22LR Barrel Adapter O-Ring

    HK, Walther, Colt, .22LR Barrel Adapter O-Ring

    USA

    $2.95
    H&K, Walther, Colt, .22LR Barrel Adapter O-Ring Made from the highest quality & very durable Viton material. The O-ring on the adapter can tear with use or become brittle over time. Be sure to grab a few extra rings with your adapter to ensure...
    HKP-17379
    $2.95
    Qty in Cart: 0
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    $2.95
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  • H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black

    H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black

    H&K Heckler & Koch

    $4.95
    H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black A great spare and a much-needed part for your HK barrel. This factory part is a high-wear item, as the O-ring provides the seal between the slide and the barrel, which provides a secure lockup with...
    HKP-00296
    $4.95
    Qty in Cart: 0
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    $4.95
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  • H&K Oversized Barrel Retaining Pin - 5.25mm

    H&K Oversized Barrel Retaining Pin - 5.25mm

    H&K Heckler & Koch

    $9.95
    H&K Oversized Barrel Retaining Pin - 5.25mm This is the barrel pin used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel in the trunnion. Each pin is slightly...
    HKP-16954
    $9.95
    Qty in Cart: 0
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    $9.95
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  • H&K .45 ACP Thread Protector - Threaded 16x1 LH H&K .45 ACP Thread Protector - Threaded 16x1 LH

    H&K .45 ACP Thread Protector - Threaded 16x1 LH

    H&K Heckler & Koch

    $24.95
    H&K .45 ACP Thread Protector - Threaded 16x1 LH The cap fits all HK45 full size & compact barrels threaded 16x1 LH hand thread. A must have item to protect your threaded barrels, exposed threads, and your HK pistol investment. The use of the...
    HKP-00297
    $24.95
    Qty in Cart: 0
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    $24.95
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  • H&K 9mm Thread Protector - Threaded 13.5x1 LH H&K 9mm Thread Protector - Threaded 13.5x1 LH

    H&K 9mm Thread Protector - Threaded 13.5x1 LH

    H&K Heckler & Koch

    $39.95
    H&K 9mm Thread Protector - Threaded 13.5x1 LH This German HK manufactured 9mm tactical threaded barrel protector fits all HK 9mm threaded barrels that are 13.5x1 metric LH twist.  Specifications: Overall Length .45" Outside Diameter ...
    HKP-00919
    $39.95
    Qty in Cart: 0
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    $39.95
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  • HKP MP5SD Sealing Ring - Enhanced

    HKP MP5SD Sealing Ring - Enhanced

    HKP HK Parts

    $9.95
    HKP MP5SD Sealing Ring - Enhanced The enhanced sealing ring is made from a newer, longer-lasting material as well as having a slightly thicker profile for secure sealing. The MP5SD sealing ring is the gasket that seals the SD suppressor against the...
    HKP-18053
    $9.95
    Qty in Cart: 0
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    $9.95
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  • On Sale
    HKP 9mm CZ Scorpion Evo 3-Lug Adapter - Threaded 18x1 HKP 9mm CZ Scorpion Evo 3-Lug Adapter - Threaded 18x1

    HKP 9mm CZ Scorpion Evo 3-Lug Adapter - Threaded 18x1

    HKP HK Parts

    Now: $39.95
    Was: $64.95
    HKP 9mm CZ Scorpion Evo 3-Lug Adapter - Threaded 18x1 Upgrade your CZ Scorpion Evo with the HK Style 3-Lug Adapter, threaded internally with 18x1mm to attach 3-lug accessories like flash hiders, compensators, and suppressors. This HK Parts exclusive...
    HKP-17616
    Now: $39.95
    Was: $64.95
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  • H&K HK 9mm Barrel Thread Protector O-Ring - Black

    H&K HK 9mm Barrel Thread Protector O-Ring - Black

    H&K Heckler & Koch

    $4.95
    HK German 9mm Barrel O-ring - Black The O-ring is a high-wear and replacement item. To save money - order 10 or more and get an additional $1 off per O-ring. Compatible With The Following Barrels That Have An O-ring Groove: HK USP 9mm HK USP Compact...
    HKP-00908
    $4.95
    Qty in Cart: 0
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    $4.95
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  • On Sale
    HKP 9mm 3-Lug Adapter - Threaded 1/2x28 HKP 9mm 3-Lug Adapter - Threaded 1/2x28

    HKP 9mm 3-Lug Adapter - Threaded 1/2x28

    HKP HK Parts

    Now: $34.95
    Was: $49.95
    HKP 9mm 3-Lug Adapter - Threaded 1/2x28 The HK 3-Lug Adapter is a premium component designed to enhance your setup. It features internal 1/2x28 threading, allowing you to attach it to existing 1/2x28 threaded applications. This adapter enables the use...
    HKP-00106
    Now: $34.95
    Was: $49.95
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    Now: $34.95
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  • H&K P30L 9mm Tactical Barrel - Threaded 13.5x1 LH H&K P30L 9mm Tactical Barrel - Threaded 13.5x1 LH

    H&K P30L 9mm Tactical Barrel - Threaded 13.5x1 LH

    H&K Heckler & Koch

    $299.95
    H&K P30L 9mm Tactical Barrel - Threaded 13.5x1 LH Made in Germany at the HK factory from HK German Cold Hammer Forged barrel blanks, heat treated and finished to HK specs. This is the only HK factory manufactured P30L threaded barrel. The finest...
    HKP-16746
    $299.95
    Qty in Cart: 0
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    $299.95
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  • H&K VP9 9mm Tactical Barrel - Threaded 13.5x1 LH H&K VP9 9mm Tactical Barrel - Threaded 13.5x1 LH

    H&K VP9 9mm Tactical Barrel - Threaded 13.5x1 LH

    H&K Heckler & Koch

    $284.95
    H&K VP9 9mm Tactical Barrel - Threaded 13.5x1 LH Precision-made in Germany by HK from cold hammer forged (CHF) ordnance-grade steel, this is the finest threaded factory barrel available for the HK VP9 or VP9 Tactical pistol. Ideal as a spare or...
    HKP-17995
    $284.95
    Qty in Cart: 0
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    $284.95
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  • H&K UMP/USC (.40 S&W/.45 ACP/9mm) Barrel Roll Pin

    H&K UMP/USC (.40 S&W/.45 ACP/9mm) Barrel Roll Pin

    H&K Heckler & Koch

    $11.94
    HK German USC, UMP Barrel Pin - German HK recommends replacing the barrel pin when the barrel is removed with a new barrel pin. This is a great spare part to have on hand. The factory-correct barrel pin for all HK UMP & USC models. A great upgrade...
    HKP-00603
    $11.94
    Qty in Cart: 0
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    $11.94
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  • H&K HK .40 Barrel O-Ring - Green H&K HK .40 Barrel O-Ring - Green

    H&K HK .40 Barrel O-Ring - Green

    H&K Heckler & Koch

    $4.95
    HK German .40 Cal Barrel O-ring Get them while you can, as they are no longer made in green and are only offered while supplies last. The green o-rings were first used on the older HK pistols. Made from the same material as the...
    HKP-01985
    $4.95
    Qty in Cart: 0
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    $4.95
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  • Out Of Stock
    HK G36/SL8 (5.56/.223) Barrel Wrench HK G36/SL8 (5.56/.223) Barrel Wrench

    HK G36/SL8 (5.56/.223) Barrel Wrench

    $129.95
    Barrel Wrench HK SL8 & G36 It will fit everything from the 9" G-36C to the 20" SL-8. The wrench features 3 points of contact to ensure maximum connection and maximum torque to the barrel nut. It also features a 3/8" drive socket to allow loosening...
    HKP-00283
    $129.95
    Qty in Cart: 0
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    $129.95
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  • On Sale
    HKP SD Barrel Port Brush Handle HKP SD Barrel Port Brush Handle

    HKP SD Barrel Port Brush Handle

    HKP HK Parts

    Now: $29.95
    Was: $39.95
    HKP SD Barrel Port Brush Handle The HK Parts SD brush handle is the perfect tool to pair with your factory H&K or HK Parts barrel brush.  Unlike other brush handles, the HKP handle features a locking clamp allowing the user to rotate the brush...
    HKP-21448-M
    Now: $29.95
    Was: $39.95
    Qty in Cart: 0
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    Now: $29.95
    Was: $39.95
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  • RCM HK VP9 9mm Tactical Barrel - Threaded 1/2x28 RCM HK VP9 9mm Tactical Barrel - Threaded 1/2x28

    RCM HK VP9 9mm Tactical Barrel - Threaded 1/2x28

    RCM

    $225.00
    RCM HK VP9 9mm Tactical Barrel - Threaded 1/2x28 Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded barrel available for the HK VP9 9mm pistol, perfect as...
    HKP-16849
    $225.00
    Qty in Cart: 0
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    $225.00
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  • H&K HK Mark 23 Thread Protector H&K HK Mark 23 Thread Protector

    H&K HK Mark 23 Thread Protector

    H&K Heckler & Koch

    $40.99
    New factory HK Mark 23 SOCOM thread protector This is the only thread protector that HK offers that will fit the HK Mark 23 Pistol. This is a hard-to-find item and a must-have for all MK23 Owners. Compatible With: All H&K Mark 23/ SOCOM barrels...
    HKP-00293
    $40.99
    Qty in Cart: 0
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    $40.99
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  • On Sale
    HKP 9mm 3-Lug Adapter - Threaded 13.5x1 LH HKP 9mm 3-Lug Adapter - Threaded 13.5x1 LH

    HKP 9mm 3-Lug Adapter - Threaded 13.5x1 LH

    HKP HK Parts

    Now: $34.95
    Was: $49.95
    HKP 9mm 3-Lug Adapter - Threaded 13.5x1 LH The HK Parts 3-Lug Adapter is internally threaded in 13.5x1 left hand. Our adapter allows the attachment of common 3-lug accessories: flash hiders, compensators, suppressors, etc. This is the finest machined HK...
    HKP-17410
    Now: $34.95
    Was: $49.95
    Qty in Cart: 0
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    Now: $34.95
    Was: $49.95
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  • H&K USP .45 ACP Tactical Barrel - Threaded 16x1 LH H&K USP .45 ACP Tactical Barrel - Threaded 16x1 LH

    H&K USP .45 ACP Tactical Barrel - Threaded 16x1 LH

    H&K Heckler & Koch

    $310.99
    H&K USP .45 ACP Tactical Barrel - Threaded 16x1 LH HK USP .45 ACP German factory threaded barrel for use with flash hiders or sound suppressors. This is a drop in barrel for any of the HK USP .45 ACP pistols. No gunsmith is required as this is an...
    HKP-00319
    $310.99
    Qty in Cart: 0
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    $310.99
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  • HKP .45 ACP Thread Protector - Threaded 16x1 LH HKP .45 ACP Thread Protector - Threaded 16x1 LH

    HKP .45 ACP Thread Protector - Threaded 16x1 LH

    HKP

    $14.95
    HKP .45 ACP Thread Protector - Threaded 16x1 LH This .45 caliber thread protector fits all full-size and compact barrels with 16x1 LH threads. Made in the USA from stainless steel with a nitride finish, it's essential for protecting your threaded barrels...
    HKP-19669
    $14.95
    Qty in Cart: 0
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    $14.95
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  • H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly

    H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly

    H&K Heckler & Koch

    $64.95
    H&K HK MR556, MR762, 416, & 417 Complete Piston Rod Assembly  A great replacement or spare to keep on hand. Compatible With: HK MR556 HK 416 HK 416 A5 MR762 HK 417 Please Note: Does not fit barrels less than 10 inches.
    HKP-00042
    $64.95
    Qty in Cart: 0
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    $64.95
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  • 90 Series Barrel Pin Jig 90 Series Barrel Pin Jig

    90 Series Barrel Pin Jig

    HKP HK Parts

    $119.95
    90 Series Barrel Pin Jig This is the perfect jig for the installation and removal of barrel pins found in all HK 90 series rifles and pistols. This jig set is a companion set for those who have flat-bending jigs and other...
    HKP-08928
    $119.95
    Qty in Cart: 0
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    $119.95
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  • HKP HK MP5SD 9mm Barrel Port Brush HKP HK MP5SD 9mm Barrel Port Brush

    HKP HK MP5SD 9mm Barrel Port Brush

    HKP HK Parts

    $79.95
    HKP HK MP5SD 9mm Barrel Port Brush The HKP MP5SD barrel port brush can be rotated in either direction for stiffer or softer cleaning when using our proprietary handle. Compatible with any brush handle featuring the factory thread pitch. Compatible...
    HKP-20989
    $79.95
    Qty in Cart: 0
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    $79.95
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  • Out Of Stock
    HK G36/SL8 (5.56/.223) Barrel Mandrel HK G36/SL8 (5.56/.223) Barrel Mandrel

    HK G36/SL8 (5.56/.223) Barrel Mandrel

    $99.95
    Barrel Mandrel For Removal & Installation of HK G36 & SL8 Barrels From the mother of invention comes the state-of-the-art H&K SL-8 and G-36 barrel wrench. It will fit everything from the 9" G-36c to the 20" SL-8. The barrel mandrel reinforces...
    HKP-02608
    $99.95
    Qty in Cart: 0
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    $99.95
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  • HKP MP5K Enhanced SD Shroud HKP MP5K Enhanced SD Shroud

    HKP MP5K Enhanced SD Shroud

    HKP HK Parts

    $119.95
    MP5K SD Shroud For SP89 & MP5K Conversion Our MP5K SD shroud is a the best option for those who want to build a custom MP5K SD model. Made in the USA.
    HKP-00849
    $119.95
    Qty in Cart: 0
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    $119.95
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  • Kaw Valley Precision 9mm Thread Adapter - Converts 13.5x1 LH To 1/2x28 Kaw Valley Precision 9mm Thread Adapter - Converts 13.5x1 LH To 1/2x28

    Kaw Valley Precision 9mm Thread Adapter - Converts 13.5x1 LH To 1/2x28

    Kaw Valley Precision

    $29.95
    Kaw Valley Precision 9mm Thread Adapter - Converts 13.5x1 LH To 1/2x28 Converts barrel thread pitches to match desired muzzle device thread pitches. For example, this adapter converts a 13.5x1 LH barrel thread to a 1/2x28 thread, allowing for the...
    HKP-19991
    $29.95
    Qty in Cart: 0
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    $29.95
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  • Out Of Stock
    RCM HK21 Barrel RCM HK21 Barrel

    RCM HK21 Barrel

    RCM

    $874.95
    RCM HK21 Barrel RCM HK21 are crafted from 41V50 CHF blanks and fully nitrided for optimal corrosion resistance and aesthetic appeal. These barrels are the most cost-effective option to finish your HK21/FMP or HK11 build. You'll only need to add your own...
    HKP-21521
    $874.95
    Qty in Cart: 0
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    $874.95
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  • HKP 9mm Enhanced Thread Protector - Threaded 13.5x1 LH HKP 9mm Enhanced Thread Protector - Threaded 13.5x1 LH

    HKP 9mm Enhanced Thread Protector - Threaded 13.5x1 LH

    HKP HK Parts

    $24.95
    HKP 9mm Enhanced Thread Protector - Threaded 13.5x1 LH Titanium manufactured enhanced thread protector in 13.5x1 LH for use with all threaded barrels. This unique design will fit over and protect the crown of your barrel for added protection...
    HKP-19497
    $24.95
    Qty in Cart: 0
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    $24.95
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  • HKP 9mm Enhanced Texas Style Thread Protector - Threaded 13.5x1 LH HKP 9mm Enhanced Texas Style Thread Protector - Threaded 13.5x1 LH

    HKP 9mm Enhanced Texas Style Thread Protector - Threaded 13.5x1 LH

    HKP HK Parts

    $19.95
    HKP 9mm Enhanced Texas Style Thread Protector - Threaded 13.5x1 LH This enhanced thread protector, made from stainless steel in a 13.5x1 LH thread, is designed to fit over and protect the crown of any threaded barrel. Its unique design offers added...
    HKP-17978
    $19.95
    Qty in Cart: 0
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    $19.95
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  • RCM MP5 9mm Trunnion RCM MP5 9mm Trunnion

    RCM MP5 9mm Trunnion

    RCM

    $64.95
    RCM MP5 9mm Trunnion US made to exact factory HK specifications and machined completely from ordnance grade steel and heat treated to factory specs.  Compatible With: MP5, 94 MP5K SP89 Clones or other custom builds
    HKP-01193
    $64.95
    Qty in Cart: 0
    Quantity:
    Price:
    $64.95
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  • Out Of Stock
    H&K Barrel Retaining Pin - 5.15mm H&K Barrel Retaining Pin - 5.15mm

    H&K Barrel Retaining Pin - 5.15mm

    H&K Heckler & Koch

    $0.00
    H&K Barrel Retaining Pin - 5.15mm This is the barrel pin used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel in the trunnion. Each pin is slightly oversized for...
    HKP-01662
    $0.00
    Qty in Cart: 0
    Quantity:
    Price:
    $0.00
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  • RCM HK USP .45 ACP Tactical Barrel - Threaded .578x28 RH RCM HK USP .45 ACP Tactical Barrel - Threaded .578x28 RH

    RCM HK USP .45 ACP Tactical Barrel - Threaded .578x28 RH

    RCM

    $270.00
    RCM HK USP .45 ACP Tactical Barrel - Threaded .578x28 RH HK USP .45 & USP .45 Tactical threaded barrel compatible with various flash hiders and sound suppressors. Unlike the factory USP .45 Tactical barrel, which uses a less common metric 16x1 left...
    HKP-17447
    $270.00
    Qty in Cart: 0
    Quantity:
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    $270.00
    Subtotal:
  • Out Of Stock
    B&T HK MP5SD 9mm Barrel - Threaded 18x1 RH B&T HK MP5SD 9mm Barrel - Threaded 18x1 RH

    B&T HK MP5SD 9mm Barrel - Threaded 18x1 RH

    B&T Brugger & Thomet

    $449.95
    B&T HK MP5SD 9mm Barrel - Threaded 18x1 RH New from B&T Switzerland, this cold hammer forged (CHF), ported, and nitrided barrel is designed to meet factory HK specifications exclusively for MP5SD models. With a long-standing relationship with...
    HKP-17957
    $449.95
    Qty in Cart: 0
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    $449.95
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  • Kaw Valley Precision Suppressor Adapter - Threaded 1/2x28 RH - 3-Lug Kaw Valley Precision Suppressor Adapter - Threaded 1/2x28 RH - 3-Lug

    Kaw Valley Precision Suppressor Adapter - Threaded 1/2x28 RH - 3-Lug

    Kaw Valley Precision

    $36.95
    Kaw Valley Precision 9mm 3-Lug Suppressor Adapter - Threaded 1/2x28 RH The KVP 3-Lug Adapters are precision engineered to replicate the popular HK pattern 3-Lug interface. Crafted with meticulous attention to concentricity, these adapters ensure...
    HKP-19987
    $36.95
    Qty in Cart: 0
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    $36.95
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  • Barrel Nut - HK 416, MR556 - Stainless Steel Barrel Nut - HK 416, MR556 - Stainless Steel

    Barrel Nut - HK 416, MR556 - Stainless Steel

    $39.95
    HK MR556, HK 416 Barrel Nut or Socket For Barrel - Stainless Steel A must have repair and replacement part for removal or when you have any work done to your barrel as the barrel nut may become damaged in the removal and installation processes. Made in...
    HKP-17334
    $39.95
    Qty in Cart: 0
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    $39.95
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