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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
H&K .45 ACP Tactical Texas Style Thread Protector - Threaded 16x1 RH
H&K Heckler & Koch
$24.95H&K .45 ACP Tactical Texas Style Thread Protector - Threaded 16x1 RH The Texas Style thread protector features raised knurling, distinguishing it from the standard HK style, which does not have this raised texture. This design ensures a secure grip...HKP-20406$24.95 -
H&K HK USP Elite .45 ACP Barrel - Black
H&K Heckler & Koch
$499.95HK USP Elite .45 ACP Barrel - Black The finest HK USP .45 barrel available and used in the HK Elite line of firearms from hand-selected barrel blanks. Compatible With: HK USP Elite .45 ACP Also fits the USP .45 Full Size & Tactical models but...HKP-01524$499.95 -
HKP .40 S&W Enhanced Titanium Thread Protector- Threaded 9/16x24 - Silver
HKP HK Parts
$24.95HKP .40 S&W Enhanced Titanium Thread Protector- Threaded 9/16x24 This solid titanium .40 S&W tactical thread protector is designed for barrels threaded 9/16x24. It’s an essential accessory for safeguarding your threaded barrel,...HKP-17976$24.95 -
HKP .40 S&W Thread Protector - Threaded 9/16x24 RH
HKP HK Parts
$14.95HKP .40 S&W Thread Protector - Threaded 9/16x24 RH The HK Parts 9/16x24 Thread Protector is specifically designed for .40 S&W handgun barrels with 9/16x24 right-hand threading, compatible with HK, Glock, Sig, SW, and more. Essential...HKP-17032$14.95 -
Out Of Stock
HKP HK G36K Barrel
HKP HK Parts
$499.95HKP HK G36K Barrel Brand new HK G36K barrel made from 416 stainless steel and nitrided, uninstalled & unfired. The G36K barrel uses a factory German or USA spec G36K/G36C gas block. Counts as one USA made complaint part. Perfect for the SL8/G36 style...HKP-18194$499.95 -
Out Of Stock
MM HK UMP (9mm) Barrel - 16.5 Inch
Michaels Machines
$549.95MM HK UMP (9mm) Barrel - 16.5 Inch Fluted just like the factory HK barrels with 16 flutes.HKP-02282$549.95 -
PTR-32 (7.62x39) Barrel - 12.7 inch
PTR
$179.95PTR-32 (7.62x39) Barrel - 12.7 inch PTR-91 US made 12.7" barrel. Factory production perfect for new builds. Counts as one US made compliant part. Compatible With: Short length G3K cocking tubes with no modificationHKP-17404$179.95 -
RCM HK P30 .40 to 9mm Conversion Barrel - Threaded - 1/2x28
RCM
$214.95RCM HK P30 .40 to 9mm Conversion Barrel - Threaded - 1/2x28 This 9mm conversion barrel is a drop-in replacement that allows your P30 to shoot the popular 9mm cartridge. The conversion barrel features a standard 1/2x28 thread pitch and includes a...HKP-21791$214.95 -
RCM HK23E Barrel - CHF
RCM
$699.95RCM HK23E Barrel RCM HK23E light profile barrels are made from mil-spec 41V50 CHF blanks that are fully salt bath nitrided for optimal wear and corrosion resistance. These barrels are the finest out there to complete your HK23E or HK13 build. These are...HKP-21837$699.95 -
H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare
H&K Heckler & Koch
$987.95H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare Factory German date coded with H&K logo. This new old stock 3-lug threaded item is incredibly rare and in pristine condition. An absolute gem in the market. We only have a limited number...HKP-21662$987.95 -
$139.95 -
H&K HK USP Elite 9mm Barrel - Black
H&K Heckler & Koch
$699.95HK USP Elite 9mm Barrel - BlackHKP-01760$699.95 -
H&K MP5K PDW 10mm Barrel - Threaded 9/16x24 - 3-Lug
USA
$299.95H&K MP5K PDW 10mm Barrel - Threaded 9/16x24 - 3-Lug This US-made MP5KN PDW 10mm barrel features a 9/16x24 thread pitch and a 3-lug design. It is a rare and hard-to-find barrel, with only a few available. Ideal for enhancing your MP5K PDW, this barrel...HKP-02317$299.95 -
HK P30, P30S .40 Barrel - Black
H&K Heckler & Koch
$274.95HK P30, P30S .40 Barrel - Black New HK German P30 standard factory length.HKP-02412$274.95 -
HKP HK MP5/K Thread Protector - Threaded 1/2x32 RH
HKP HK Parts
$14.95HKP HK MP5/K Thread Protector - Threaded 1/2x32 RH This MP5/K thread protector is designed to safeguard your barrel threads from damage when a muzzle device is not in use. Made in the USA from high-quality steel, it offers durability and a precise fit...HKP-21829$14.95 -
RCM HK G3/91 Threaded Barrel - 5/8x24 - CHF
RCM
$264.99RCM HK G3/91 Threaded Barrel - 5/8x24-CHE Machined by RCM from a Mil-Spec 41V50 Hammer Forged Blank. These blanks are considered to be one of the finest made. 1:10 twist, Nitride finish. Perfect for that HK build or to replace that shot out barrel. Each...HKP-21838$264.99 -
RCM HK MP5K 10mm Barrel - Threaded 14x.75
RCM
$279.95RCM HK MP5K 10mm Barrel - Threaded 14x.75 Upgrade your MP5K with the RCM HK MP5K 10mm Barrel, featuring a precise 14x1.75 threading for optimal accessory compatibility. Expertly crafted to enhance performance and reliability, this barrel is perfect for...HKP-21155$279.95 -
RCM HK MP5K 10mm Barrel - Threaded 9/16x24
RCM
$279.95RCM HK MP5K 10mm Barrel - Threaded 9/16x24 Enhance the performance of your MP5K with the RCM HK MP5K 10mm Barrel. This barrel is precision engineered for superior accuracy and durability, making it an essential upgrade for firearm enthusiasts...HKP-21157$279.95 -
RCM HK P2000 .40 S&W Barrel - Threaded 14.5x1 LH
RCM
$225.00RCM HK P2000 .40 S&W Barrel - Threaded 14.5x1 LH Each P2000 .40 tactical 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 threaded...HKP-16942$225.00 -
RCM HK USPC 9mm Barrel - Non-Threaded
RCM
$199.95RCM HK USPC 9mm Barrel - Non-Threaded Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest replacement barrel for the HK USPC 9mm pistol, ideal as a spare or for...HKP-16704$199.95 -
RCM HK VP40 to 9mm Conversion Barrel - Threaded - 13.5x1
RCM
$214.95RCM HK VP40 to 9mm Conversion Barrel - Threaded - 13.5x1 This 9mm conversion barrel is a drop-in replacement that allows your VP40 to shoot the popular 9mm cartridge. Comes with a thread protector. Each barrel is made from ordnance-grade steel,...HKP-21790$214.95 -
RCM HK53K (5.56/.223) Barrel - Threaded 15x1 RH
RCM
$164.95RCM HK53K (5.56/.223) Barrel - Threaded 15x1 RH These are the finest US-made barrels available and come highly recommended by HKParts. Specifications: Made In The USA Threaded 15x1 RH Counts As 1 US Made 922r Compliant Part Cold Hammer Forged...HKP-02400$164.95 -
Out Of Stock
H&K 21E/23E (7.62x51/.308) & (5.56/.223) Barrel Case w/ Sling - 18 inch Barrels
H&K Heckler & Koch
$0.00HK German 21/23 Barrel Carrying Case W/ Sling (All Steel Heavy Duty) For All HK21/23 17.75 (18&) Inch Barrels. Rare and now out of production.HKP-00586$0.00 -
Out Of Stock
H&K 21E/23E (7.62x51/.308) & (5.56/.223) Barrel Case With Sling - 22 inch
H&K Heckler & Koch
$0.00HK German 21/23E Barrel Case With Sling (All Steel Heavy Duty) For All HK21/23E - 22 Inch BarrelsHKP-01151$0.00 -
H&K HK 940 .30-06 Rifle Barrel
H&K Heckler & Koch
$948.95H&K HK 940 .30-06 Rifle Barrel We understand how challenging it can be to find rare and hard-to-find components for your firearms, which is why we are pleased to present an exceptional opportunity to acquire a replacement barrel for the HK940 in ...HKP-21605$948.95 -
H&K HK USC 45 Barrel - Used
H&K Heckler & Koch
$695.95Barrel - HK USC 45 in Exc + shape HK German factory USC 45 barrel in excellent + condition. Rare and hard to find.HKP-20471$695.95 -
Out Of Stock
H&K HK USP .45 ACP Barrel - Match - Black
H&K Heckler & Koch
$0.00H&K HK USP .45 ACP Barrel - Match - Black The real deal factory HK Match barrel. This barrel will fit all HK USP .45 full size models. If you want a longer barrel for your HK USP 45 or USP 45 Tactical this is a great option for an extended length or...HKP-17508$0.00 -
Out Of Stock
H&K HK USPC .357 SIG Barrel
H&K Heckler & Koch
$0.00HK USP Compact .357 SIG Barrel This barrel is a direct replacement part for all HK USPC .40 or .357 or if you want to convert your .40 USPC to a .357. It comes 3.58" in overall length.HKP-01902$0.00 -
Out Of Stock
H&K MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug
H&K Heckler & Koch
$599.95H&K MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug German HK Barrel that is threaded and three lugged with the factory correct thread pitch 14x.75 and thread protector. Pulled out from demilled MP5 .40 S&W, this is a rare part, and only a few...HKP-01638$599.95 -
H&K MP5 .40 S&W Factory Barrel - Threaded - 3-Lug
H&K Heckler & Koch
$1,495.00H&K MP5 .40 S&W Factory Barrel - Threaded - 3-Lug New MP5 .40 S&W barrel. Factory-installed sight tower with sight/sling eyelets and factory finish. Specifications: Threaded 3-Lug Compatible With: HK MP5 .40 S&W Rare & hard to find...HKP-19349$1,495.00 -
Out Of Stock
H&K MP5 40/10 Thread Protector Cap
H&K Heckler & Koch
$0.00HK German Factory Thread Protector For All MP5 40/10 Factory HK Barrels. The Thread Pitch Is Metric 14 X.75HKP-00422$0.00 -
Out Of Stock
H&K MR556 & HK416 (5.56x45/.223) Upper Conversion Kit - Threaded 1/2x28
HKP HK Parts
$699.95H&K MR556 & HK416 (5.56x45/.223) Upper Conversion Kit - Threaded 1/2x28 Finally an answer for all of those that have been wanting a 14.5" upper for an HK416 or MR556. This conversion kit adds an upper or a barrel option for your MR556, CR556...HKP-17877$699.95 -
On Sale
H&K SL8 Complete Barrel w/ Trunnion
H&K Heckler & Koch
Now: $639.95Was: $1,099.95H&K SL8 Complete Barrel w/ Trunnion Complete factory HK SL8 barrel with trunnion. Compatible With: HK SL8 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL.HKP-99031Now: $639.95Was: $1,099.95 -
Out Of Stock
H&K UMP (.45 ACP) Barrel - Used
H&K Heckler & Koch
$0.00HK UMP 45 ACP 8 Inch Barrel - German German HK Cold Hammer Forged Barrel- UsedUsed PD trade in authentic German HK UMP .45 barrel. Polygonal and cold hammer forged. A rare part as the barrel is not a part that can be bought from HK separately. The only...HKP-14955$0.00 -
On Sale
H&K UMP .40 S&W Threaded Barrel - USED
H&K Heckler & Koch
Now: $359.95Was: $624.95H&K UMP .40 S&W Threaded Barrel - USED UNKOWN THREAD PITCH. We do not have compatible gauges on site and therefore cannot easily check. Enhance your HK UMP with this threaded barrel. This barrel is specifically designed for the ...HKP-99026Now: $359.95Was: $624.95 -
Out Of Stock
H&K USP 9mm Tactical Barrel - Threaded 13.5x1 LH
H&K Heckler & Koch
$0.00H&K USP 9mm Tactical Barrel - Threaded 13.5x1 LH This barrel is a drop-in replacement barrel for standard full-size USP 9mm Pistols. Cold hammer forged, polygonal rifled, and made in Germany. Specifications: Threaded 13.5x1 LH Overall Length 4...HKP-00797$0.00 -
Out Of Stock
HK G36E Barrel
USA
$499.95Barrel - USA - HK G36E Brand new HK G36E barrel. Specifications: Barrel length 19"HKP-19273$499.95 -
On Sale
HK MP5 Barrel with Trunnion
USA
Now: $139.95Was: $209.95HK MP5 Barrel with Trunnion US made barrel with attached trunnion for the HK MP5. Compatible With: HK MP5 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL.HKP-99100Now: $139.95Was: $209.95 -
On Sale
HK MP5 Trunnion - Gunsmith Special
USA
Now: $24.95Was: $54.95HK MP5 Trunnion - Gunsmith Special US made HK MP5 trunnions sold as-is. Will require work before being functional. We recommend the work be performed by a professional gunsmith. The condition will vary from part-to-part vs. the pictured unit. Compatible...HKP-99089Now: $24.95Was: $54.95 -
On Sale
HK MP5K Trunnion - Gunsmith Special
USA
Now: $24.95Was: $54.95HK MP5K Trunnion - Gunsmith Special US made HK MP5 trunnions sold as-is. Will require work before being functional. We recommend the work be performed by a professional gunsmith. The condition will vary from part-to-part vs. the pictured unit. Compatible...HKP-99090Now: $24.95Was: $54.95