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 Heckler & Koch
$4.95HK .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...HKP-01984$4.95 -
HK, Walther, Colt, .22LR 1/2x28 Barrel Adapter
USA
$29.95Barrel Adapter With Thread Protector M8 X.75 To 1/2x28 This custom adapter allows you to unscrew the stock flash hider and quickly and effortlessly convert the barrel to 1/2X28 threads. It can be mounted permanently and provides the perfect index without...HKP-01845$29.95 -
H&K Barrel Retaining Pin - 5mm Standard Size
H&K Heckler & Koch
$9.95H&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 -
H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black
H&K Heckler & Koch
$4.95H&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 -
HKP HK .45 Barrel O-Ring All Caliber Pistols - Red
HKP HK Parts
$4.95HKP 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 -
HK 9mm Barrel O-Ring For Thread Protector - Green
H&K Heckler & Koch
$4.95HK 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 -
HK, Walther, Colt, .22LR Barrel Adapter O-Ring
USA
$2.95HK, Walther, Umarex 416, Colt M4 or MP5-A5 .22 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...HKP-17379$2.95 -
H&K Oversized Barrel Retaining Pin - 5.25mm
H&K Heckler & Koch
$9.95H&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 trunion. Each pin is slightly oversized...HKP-16954$9.95 -
H&K HK VP9/Tactical 13.5x1 9mm Threaded Barrel - Black
H&K Heckler & Koch
$284.95H&K HK VP9/Tactical 13.5x1 9mm Threaded Barrel - Black Precision made in Germany by HK from cold hammer forged (CHF) ordnance grade steel. This barrel offering is the finest threaded HK factory barrel available for the HKVP9 or VP9 Tactical pistol...HKP-17995$284.95 -
H&K HK P30L 13.5x1 9mm Threaded Barrel - Black
H&K Heckler & Koch
$299.95H&K HK P30L 13.5x1 9mm Threaded Barrel - Black 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 -
H&K HK 9mm Barrel Thread Protector O-Ring - Black
H&K Heckler & Koch
$4.95HK 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 -
Out Of Stock
H&K Barrel Retaining Pin - 5.15mm
H&K Heckler & Koch
$0.00H&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 trunion. Each pin is slightly oversized for...HKP-01662$0.00 -
H&K UMP/USC (.40 S&W/.45 ACP/9mm) Barrel Roll Pin
H&K Heckler & Koch
$11.94HK 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 -
H&K HK USP/USP Tactical Threaded Barrel - Black
H&K Heckler & Koch
$310.99HK USP .45 Tactical Threaded Barrel - 16 X 1 Left-Hand Threaded HK USP 45 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 pistols. No gunsmith is required as this is an...HKP-00319$310.99 -
HKP 16x1 LH .45 Cal Thread Protector
HKP
$14.95HKP 16 x 1 LH .45 Cal Thread Protector USA manufactured .45 caliber thread protector, cap fits all .45 cal full size & compact barrels threaded 16mm X 1mm left hand thread. A must have item to protect your threaded barrels, exposed threads & your...HKP-19669$14.95 -
90 Series Barrel Pin Jig
HKP HK Parts
$119.9590 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 -
H&K HK .40 O-ring for Barrel - Green
H&K Heckler & Koch
$4.95HK 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 -
B&T MP5-SD CHF Barrel
B&T Brugger & Thomet
$449.95B&T MP5-SD CHF Barrel New from B&T Switzerland, cold hammer forged (CHF), properly factory specification fluted, ported & nitrided MP5SD barrels manufactured exclusively for MP5's. The firearms community has long known of the close...HKP-17957$449.95 -
HK G36/SL8 (5.56/.223) Barrel Wrench
$129.95Barrel 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 -
Out Of Stock
RCM HK VP9SK 1/2x28 9mm Threaded Barrel - Black
RCM
$249.95Threaded Barrel - 9mm - 1/2x28 - HK VP9SK Each VPSK-T barrel machined from ordnance grade steel, heat treated then nitrided inside and out. This is the finest threaded replacement barrel available for the HK VP9SK 9mm pistol. The perfect barrel...HKP-19258$249.95 -
HKP HK UMP (.45 ACP) Barrel - 3 Lug - Threaded 16x1 LH
HKP HK Parts
$399.95HK UMP, Omega .45 Cal 3 -Lug & Threaded Barrel - 16 x 1 Left Hand New USA made .45 cal 8" barrel for the UMP or Omega firearms. Each barrel is threaded 16 x 1 LH and 3 lug tipped. The finest barrel for the UMP .45 on the market.HKP-18678$399.95 -
RCM HK VP9 1/2x28 9mm Tactical Threaded Barrel - Black
RCM
$229.95RCM HK VP9 1/2x28 9mm Tactical Threaded Barrel - Black Each barrel is finely & painstakingly made from ordnance grade steel, heat treated & finished inside & out in the ultra- desirable nitride finish. This is the finest threaded barrel...HKP-16849$229.95 -
HK G36/SL8 (5.56/.223) Barrel Mandrel
$99.95Barrel Mandrel For Removal & Installation of HK G36 & SL8 Barrels The mother of invention comes the state-of-the-art H&K SL-8 and G-36 barrel wrench. Will fit everything from the 9" G-36c to the 20" SL-8. The barrel mandrel...HKP-02608$99.95 -
Out Of Stock
SilencerCo HK VP9 9mm 1/2x28 Threaded Barrel
SilencerCo
$189.95SilencerCo, Threaded Barrel, 9MM, For H&K VP9, Black 1/2x28, Includes Thread Protector High-quality components and precise manufacturing make SilencerCo parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent...HKP-19434$189.95 -
HDPS HK UMP/USC (.45 ACP) Flanged Barrel - 8"
HDPS
$329.95HDPS HK UMP 45 ACP 8 Inch Barrel - Flanged HDPS UMP barrels are perfect for the USC to UMP conversions and for a replacement UMP .45 barrel. Each barrel is an exact reproduction with all HK German specs. As a bonus, this item counts as 1 of the 3...HKP-02130$329.95 -
RCM HK VP9L 1/2x28 Threaded Barrel - Black
RCM
$239.95Threaded Barrel - 1/2x28 - VP9L - RCM Each barrel is finely and painstakingly made from ordnance grade steel, heat treated & finished inside & out in the ultra-desirable nitride finish. This is the finest threaded replacement barrel available for...HKP-19203$239.95 -
Barrel Nut - HK 416, MR556 - Stainless Steel
$39.95HK 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 -
RCM HK USP .45 ACP .578x28 Threaded Barrel - Black
RCM
$289.95RCM HK USP .45 ACP .578x28 Threaded Barrel - Black HK USP .45 & HK USP .45 Tactical threaded barrel for use with a wide variety of flash hiders & sound suppressors. This is a special offering as a factory USP .45 Tactical barrel is threaded...HKP-17447$289.95 -
HKP MP5 9mm Barrel Extension
HKP HK Parts
$49.95HKP MP5 9mm Barrel Extension MP5 3-Lug Barrel Barrel Extension, Fake Suppressor US made MP5, HK94 solid aluminum fake suppressor, barrel extension. That slips over the 3-lug 9mm MP5 barrel and then pinned in place to meet the overall 16" barrel length...HKP-18000$49.95 -
HDPS HK UMP (.45 ACP) Threaded Barrel - 16x1 LH
HDPS
$349.95HK UMP & USC 45 ACP 8" Threaded Barrel HDPS UMP barrels are perfect for the USC to UMP conversions and a replacement UMP .45 barrel. They are considered by many to be the finest US-made barrel available. This barrel is the same length as a factory HK...HKP-02634$349.95 -
H&K HK P30/P30S 13.5x1 9mm Threaded Barrel - Black
H&K Heckler & Koch
$299.95H&K HK P30/P30S 13.5x1 9mm Threaded Barrel - Black New factory OEM German barrel mande at the HK factory from HK German Cold Hammer Forged barrel blanks, heat treated and finished to HK specs. This is the finest threaded barrel available for the HK...HKP-16851$299.95 -
RCM HK USPC .40 S&W to .357 SIG Caliber Conversion Barrel - Black
RCM
$239.95RCM HK USPC .40 S&W to .357 SIG Caliber Conversion Barrel - Black Each barrel is finely and painstakingly made from ordnance grade steel, heat treated and finished inside and out in the ultra-desirable nitride finish. This is the finest replacement...HKP-17747$239.95 -
HK Parts HK MP5 1/2x28 Knurled Micro Comp
HKP HK Parts
$26.95HK Parts MP5 Micro Comp - Knurled - 1/2x28 Our new MP5 micro comp has the appearance of a standard factory-style thread protector but is now extended and slotted to provide a micro comp feature. With the added slots, it will help mitigate gasses...HKP-21176$26.95 -
B&T MP5K, SP5K, SP89 - 3 Lugged & Threaded Barrel - 1/2x28
B&T Brugger & Thomet
$349.95B&T Manufactured MP5K, SP89 & SP5K - PDW Barrel 3 Lug - 1/2x28 New from B&T Switzerland, cold hammer-forged (CHF), properly fluted & nitrided MP5K/SP5K barrels manufactured exclusively for the HK SP5K. New Swiss manufactured from...HKP-17894$349.95 -
H&K HK USP .40 Tactical Full Size 14.5x1 LH Threaded Barrel
H&K Heckler & Koch
$299.95New HK factory German USP .40 Tactical Threaded Barrel Tactical Threaded Barrel 14.5x1 left-hand thread .40 S&W Caliber Drop in replacement for your full-size USP .40 or .40 tactical pistol Genuine Heckler & Koch Part Please Note: This barrel...HKP-00328$299.95 -
RCM HK USPC 9mm 1/2x28 Tactical Threaded Barrel
RCM
$249.95HK USPC 9mm 1/2x28 Threaded Barrel- RCM Each USPC 9mm tactical barrel is made from ordnance grade steel, heat treated, and finished inside and out in the ultra-desirable "nitride" finish. It is the finest threaded replacement barrel for the HK USPC 9mm...HKP-01705$249.95 -
H&K HK 45C/45C Tactical Threaded Barrel - Black
H&K Heckler & Koch
$339.95HK45C, HK45CT Tactical Threaded Barrel New HK German HK45C threaded tactical barrel. A drop in barrel for the HK45C. Features: Heckler & Koch Genuine Part Threaded For Use With Suppressors Threaded 16 x 1 Left Hand Twist Cold hammer-forged 4.5"...HKP-01036$339.95 -
Out Of Stock
HK VP9SK 1/2x28 9mm Fluted Threaded Barrel - Black
USA
$229.95HK VP9SK 1/2x28 9mm Fluted Threaded Barrel - Black Each barrel is finely and painstakingly made from ordnance grade steel, heat treated and finished inside and out in the ultra-desirable "nitride" finish. Each enhanced barrel is machined with an...HKP-18419$229.95 -
RCM HK USPC .45 ACP .578x28 Threaded Barrel - Black
RCM
$279.95RCM HK USPC .45 ACP .578x28 Threaded Barrel - Black HK USP .45 Compact & HK USP Compact .45 Tactical threaded barrel for use with a wide variety of flash hiders & sound suppressors. This offering is for an HK USPC & USPC .45 Tactical barrel...HKP-17448$279.95 -
RCM HK VP40 To .357 Sig Conversion Barrel - Black
RCM
$239.95RCM HK VP40 To .357 Sig Conversion Barrel - Black Each barrel is finely & painstakingly made from ordnance grade steel, heat treated & finished inside & out in the ultra- desirable nitride finish. This is the finest barrel available for the...HKP-17373$239.95