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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Out Of Stock
H&K HK P9S 9mm Barrel
H&K Heckler & Koch
$899.95H&K HK P9S 9mm Barrel No longer made or available. Last call on this rare and no longer made offering. We have the last of these barrels to ever be offered.HKP-17655$899.95 -
H&K HK USP .45 ACP Expert Barrel - Black
H&K Heckler & Koch
$399.95HK USP .45 ACP Expert Barrel - Black 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 use with an HK Comp Weight.HKP-01525$399.95 -
H&K HK VP9SK Standard Barrel - Black
H&K Heckler & Koch
$234.95H&K HK VP9SK Standard Barrel - Black Brand new HK German Standard Length VP9SK Barrel. Marked HK 9mmx19 Brand new cold hammer forged & made in Germany. Compatible With: HK VP9SK modelsHKP-18320$234.95 -
On Sale
HKP AR-15 Low Profile Gas Block
HKP HK Parts
Now: $14.95Was: $29.95AR15, M4 Billeted Low Profile Gas Block - Stainless Steel Made to strict military specifications. These high quality components will provide excellent fit and reliable function in your AR series platforms. These AR-Stoner parts are perfect for upgrading...HKP-18088Now: $14.95Was: $29.95 -
On Sale
HKP Glock 17 9mm Fluted Barrel - Threaded 1/2x28
Now: $139.95Was: $239.95HKP Glock 17 9mm Fluted Barrel - Threaded 1/2x28 The Adams Arms Glock 17 9mm Match Grade Box Fluted Barrel is designed as an improved, drop-in barrel for the Glock 17. The barrel is machined to tighter fitment tolerances to increase accuracy potential...HKP-18871Now: $139.95Was: $239.95 -
HKP HK Mark 23 .45 ACP Thread Protector - Threaded 16x1 RH
HKP HK Parts
$19.95HKP HK Mark 23 .45 ACP Thread Protector - Threaded 16x1 RH Specifically designed for all H&K Mark 23/SOCOM barrels threaded 16x1 RH, this essential accessory offers superior protection for your threaded barrel. Featuring a durable nitride...HKP-21267$19.95 -
Out Of Stock
PTR HK G3/91 (7.62x51/.308) Match Grade Barrel - Threaded 15x1
PTR
$199.95PPTR HK G3/91 (7.62x51/.308) Match Grade Barrel - Threaded 15x1 Each barrel is current PTR production and has the proper number and depth of flutes for optimum functionality. This barrel is a medium contour barrel that is larger in diameter than a...HKP-00873$199.95 -
RCM HK VP9 Match 9mm Barrel - Threaded 13.5x1 LH
RCM
$262.50RCM HK VP9 Match 9mm Barrel - Threaded 13.5x1 LH Each barrel is made from ordnance grade steel, heat treated, and finished inside and out in the ultra-desirable nitride finish. The perfect barrel for use as a spare or for adding muzzle devices such as...HKP-21068$262.50 -
H&K USP .40 Expert 5.19" Barrel - Black
H&K Heckler & Koch
$299.95New HK German Factory USP Expert .40 Barrel This barrel will fit a stock USP .40 full-size pistol but will extend out the front of the slide for those who want to use a Comp Weight? or need a longer barrel for the USP .40 firearm. Made in Germany with a...HKP-01472$299.95 -
H&K USPC 9mm Barrel
H&K Heckler & Koch
$234.95H&K USPC 9mm Barrel Compatible With HK USPC 9mmHKP-01526$234.95 -
On Sale
HKP Glock 19 9mm Fluted Barrel - Threaded 1/2x28
HKP HK Parts
Now: $139.95Was: $239.95HKP Glock 19 9mm Fluted Barrel - Threaded 1/2x28 The Adams Arms Glock 19 9mm Match Grade Box Fluted Barrel is an improved drop-in fit designed for enhanced accuracy with no gunsmith fitting required. Machined to tighter tolerances, it features a SAAMI...HKP-18872Now: $139.95Was: $239.95 -
H&K G36/SL8 (5.56/.223) Barrel Retaining Nut
H&K Heckler & Koch
$29.95HK G36 & SL8 Barrel Retaining Nut - German HK Compatible With: SL8 (all models and variants) G36E G36K G36C All other G36 VariantsHKP-16341$29.95 -
H&K HK P2000 9mm Barrel - Black
H&K Heckler & Koch
$234.95New HK German HK P2000 Barrel 9mm Brand new cold hammer forged 9mm P2000 barrel. Perfect for those who want to have a spare or for caliber conversion swaps.HKP-01570$234.95 -
HKP HK 53/51 (5.56/.223) Urbach Style Fluted Barrel Extension - Threaded 15x1 RH
HKP HK Parts
$149.95HKP HK 53/51 (5.56/.223) Urbach Style 8 inch Fluted Barrel Extension - Threaded 15x1 RH This 8" long fluted barrel extension is designed to extend the overall length of a 51 or 53 barrel to meet the 16" legal requirement. Ideal for those using an 8"...HKP-17638$149.95 -
Nefarious Arms HK 416/MR556 14.5" A5 Barrel
Nefarious Arms
$694.95Nefarious Arms HK 416/MR556 14.5" A5 Barrel Each Nefarious Arms barrel is cold-hammer-forged and chrome-lined for years of accurate shooting. Grab this expertly crafted barrel for your next SBR or pistol build. Compatible With: HK 416 (A5,...HKP-21590$694.95 -
On Sale
PTR PDW (7.62x39) 9 inch Barrel
PTR
Now: $99.95Was: $149.95PTR PDW 7.62X39 Pistol or SBR Barrel- USA PTR Industries manufactured PTR PDW Barrel. As a bonus, each barrel counts as one US-made part for 922r compliance. Comes new in the white, never installed, and ready for an HK project. Features: 7.62 X 39mm...HKP-14530Now: $99.95Was: $149.95 -
RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded 16x1 RH
RCM
$269.95RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded 16x1 RH US made HK Mark 23 tactical threaded barrel for use with a wide variety of flash hiders & sound suppressors. Specifications: Made In The USA Double Stress Relieved Nitrided Finish To...HKP-20606$269.95 -
RCM HK MP5 10mm Barrel - Threaded 9/16x24
RCM
$279.95RCM HK MP5 10mm Barrel - Threaded 9/16x24 Enhance the performance of your MP5 with the RCM HK MP5 10mm Barrel. This barrel is precision engineered for superior accuracy and durability. This barrel features a 9/16x24 thread and includes a thread protector...HKP-21158$279.95 -
RCM HK51K (7.62x51/.308) Barrel - Threaded 15x1 RH
RCM
$164.95RCM HK51K (7.62x51/.308) Barrel - Threaded 15x1 RH Made to exact HK51K specifications from cold hammer forged steel, this barrel matches the quality of HK German barrels. Ideal for custom builds and HK51K style projects. Specifications: Made In The...HKP-02392$164.95 -
H&K UMP (.40 S&W) Barrel - Used
H&K Heckler & Koch
$499.95HK German Used Factory UMP .40 S&W Barrel These are police department trade-in barrels in good shape and perfectly usable.HKP-00600$499.95 -
PTR HK 93/33 (5.56/.223) Barrel - Threaded 15x1 RH
PTR
$163.95PTR HK 93/33 (5.56/.223) Barrel - Threaded 15x1 RH New US made Barrel by PTR for the HK93,33 style of firearms. Specifications: Made In The USA 922r Compliant Counts as 1 US Made Part Overall length 16.1" 4140 Ordnance Grade Steel Threaded 15x1 RH 1:9...HKP-16458$163.95 -
RCM HK 33/93 (5.56/.223) Barrel - Threaded 15x1
RCM
$234.95RCM HK 33/93 (5.56/.223) Barrel - Threaded 15x1 New Cold Hammer Forged Steel HK33/93 16.1" barrel, nitrided and US-manufactured. These barrels are among the finest available and come highly recommended by HKParts. Specifications: Made In The...HKP-01052$234.95 -
Out Of Stock
RCM HK MP5 / 416 .22LR Pistol Barrel
RCM
$229.95RCM HK MP5 / 416 .22LR Pistol Barrel This is the first and only offering of a replacement barrel for the HK .22LR platforms. Replacing the barrel previously required sending the receiver to H&K and having the assembly returned to an FFL. ...HKP-21403$229.95 -
RCM HK P2000 .40 S&W Tactical Barrel - Threaded 9/16x24 RH
RCM
$225.00RCM HK P2000 .40 S&W Tactical Barrel - Threaded 9/16x24 RH Each P2000 .40 S&W tactical barrel is crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. It is the finest threaded replacement barrel available...HKP-16709$225.00 -
RCM HK P2000SK .40 S&W Barrel - Threaded 14.5x1 LH
RCM
$225.00RCM HK P2000SK .40 S&W Barrel - Threaded 14.5x1 LH Each P2000 SK tactical barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for...HKP-16943$225.00 -
RCM HK33K (5.56/.223) Barrel - Threaded 15x1
RCM
$234.95RCM HK33K (5.56/.223) Barrel - Threaded 15x1 Enhance your HK33K with the RCM 12.7" barrel, crafted from cold hammer-forged steel. The nitride finish provides exceptional corrosion and wear resistance, and the fully fluted chamber meets stringent HK...HKP-02319$234.95 -
GSG9 HK G36/SL8 (5.56/.223) Barrel Retaining Nut
GSG9
$53.00HK G36 & SL8 Barrel Retaining Nut - USA Made in the USA. Compatible With: SL8 (all models & variants) G36E G36K G36C All other G36 VariantsHKP-18252$53.00 -
H&K HK P2000SK .40 S&W - Conversion Barrel - Black
H&K Heckler & Koch
$239.95HK German Factory P2000SK .40 S&W Barrel Brand new HK P2000SK .40 Cal factory cold hammer forged polygonal rifled barrel. This barrel measures 3.25" and is drop-in ready.HKP-01569$239.95 -
Out Of Stock
H&K HK USP Full Size .40 Barrel - Black
H&K Heckler & Koch
$0.00HK German USP Full Size .40 Caliber Barrel Great idea to have a spare, factory cold hammer forged, polygonal HK barrel on hand. Compatible With: USP .40 Full Size USP .40 TacticalHKP-01528$0.00 -
HK MP5/K & UMP .40 S&W 3-Lug Barrel Thread Protector - Threaded 9/16x24
$299.95HK MP5/K & UMP .40 S&W 3-Lug Barrel Thread Protector - Threaded 9/16x24 This is 3-lugged Barrel with a 9/16x24 thread protector. It is rare hard to find, there are only a few available. Specifications: 3-Lugged Barrel Includes Thread Protector...HKP-02318$299.95 -
Out Of Stock
HKP G36K Barrel Front End Kit
HKP HK Parts
$889.95G36K Barrel Front End Barrel Kit - 223/556 New production HK G36K style barrel conversion and front end kit. Each kit will include the necessary parts to build a G36/SL8 variant into the G36K barrel length variant as pictured. All you need is this kit to...HKP-18225$889.95 -
HKP HK PSG1/93/33 (5.56/.223) MSG90 Style Match Barrel
HKP HK Parts
$499.95HK PSG-1, MSG-90 Style 556,223 HK 93, HK 33 Match Barrel: This is the finest PSG1 barrel you can get for your custom HK93, SG1, PSG1 style build in .556. Built on trusted tooling to HK specifications. Perfect for that custom build or the for the...HKP-17008$499.95 -
HKP MP5 40/10 Fake Suppressor/Barrel Extension - 3-Lug
HKP HK Parts
$69.95HKP MP5 40/10 Fake Suppressor/Barrel Extension - 3-Lug This fake suppressor is used as a barrel extension to bring your H&K MP5 40/10 8.85" barrel to legal conforming standards of 16" so you do not have to register the weapon as an SBR. This fits...HKP-00889$69.95 -
Out Of Stock
MM HK 23E (5.56/.223) Heavy Rifle Barrel
Michaels Machines
$1,437.95MM HK 23E (5.56/.223) Heavy Rifle Barrel Brand new US-made custom rifle barrel. Quick change HK23E, MM23E or HK13 Barrel. A must-have spare for your HK rifle or MG. Factory Barrels are hard to find and expensive, but these barrels are of great...HKP-02513$1,437.95 -
MM HK UMP (.40 S&W) Conversion Kit
Michaels Machines
$999.95HK UMP 40 Caliber Conversion Kit With this UMP Conversion kit, UMP .45 sub guns can be converted to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub guns. This is a simple drop-in conversion. The time required to change...HKP-18754$999.95 -
RCM HK MP5N 9mm Barrel - Threaded 1/2x32 - 3-Lug
RCM
$179.95RCM HK MP5N 9mm Barrel - Threaded 1/2x32 - 3-Lug This MP5N barrel delivers exceptional value, crafted from premium Cold Hammer Forged Steel and treated with a durable nitride process. It easily accommodates suppressors and other muzzle attachments. Brand...HKP-16967$179.95 -
RCM HK P30L 9mm Barrel - Non-Threaded
RCM
$206.25RCM HK P30L 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 P30L 9mm pistol, ideal as a spare or for...HKP-16686$206.25 -
B&T TP9 130mm 9mm Barrel - Black
B&T Brugger & Thomet
$449.95Swiss B&T manufactured 130mm TP9 9mm Barrel Assembly Factory B&T replacement barrel for the TP9. Made in Switzerland. Compatible With: TP9HKP-17305$449.95 -
GSG9 UMP 9mm Barrel - Threaded 1/2x28 - 3-Lug
GSG9
$349.95GSG9 UMP (9mm) Barrel - Threaded 1/2x28 - 3-Lug This barrel is the perfect addition to your UMP conversion as it includes the 3-lug and threaded 1/2x28 end of the barrel for use with suppressors or factory HK 3-lug flash hiders. Specifications: Threaded...HKP-02281$349.95 -
H&K HK SL8 German Barrel
H&K Heckler & Koch
$999.95H&K HK SL8 German Barrel A rare find. Brand new unfired, uninstalled. German CFH HK proof marked HK SL8 barrel. For those that want a brand new replacement barrel or a new HK barrel for a custom project this is the barrel to have. Only a few...HKP-16355$999.95