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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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 -
RCM HK G3 & M61 (7.62x51/.308) Barrel - Threaded 15x1 RH
RCM
$274.95RCM HK G3 & M61 (7.62x51/.308) Barrel - Threaded 15x1 RH Brand New Barrel for the Pre-G3 HK M61. The M61 was produced by H&K in Germany and has some aesthetic features that the final G3 rifles did not incorporate. A true piece of history can be...HKP-21353$274.95 -
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 -
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 -
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 -
H&K HK VP40 Barrel - Black
H&K Heckler & Koch
$229.95Brand New HK German Standard Length VP40 Barrel. Cold Hammer Forged & Make in Germany. Compatible With: HK VP40 VP40 Tactical ModelsHKP-18722$229.95 -
H&K UMP (.40 S&W) Conversion Kit - Used
H&K Heckler & Koch
$1,087.95HK UMP .40 Caliber Conversion Kit This UMP conversion kit provides the necessary components to convert .45 sub-guns to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub-guns. This is a simple, drop-in conversion requiring a...HKP-00729$1,087.95 -
H&L HK G36, HK SL8 Roll Pin for Gas Piston - Black
H&K Heckler & Koch
$9.95H&L HK G36, HK SL8 Roll Pin for Gas Piston - BlackHKP-16386$9.95 -
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 -
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 P30 & P30S 9mm Barrel - Non-Threaded
RCM
$206.25RCM HK P30 & P30S 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 P30 9mm pistol, ideal as...HKP-16687$206.25 -
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 -
HK MP5K .40 S&W 3-Lug Barrel Thread Protector - Threaded 9/16x24
HKP HK Parts
$299.95HK MP5K .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 MP5, 94 Trunnion 9mm - USA
HKP HK Parts
$54.95HKP MP5, 94 Trunnion 9mm - USA US made to exact factory HK specifications for the HK MP5, 94 type builds. Machined completely from ordnance grade steel and heat treated to factory specs. These are the best USA made trunnions on the market. Machined to HK...HKP-17934$54.95 -
MM HK UMP 9mm Conversion Kit
Michaels Machines
$1,293.95HK UMP & USC 9mm Conversion Kit US Made - 9mm UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The conversion parts are drop-in with...HKP-02286$1,293.95 -
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 -
H&K HK 93, HK 33 Barrel, NIW 1 in 7, RARE
H&K Heckler & Koch
$1,887.95Rare Barrel - NIW 1 in 7 - HK93, HK33: New HK93/33 NIW 1 in 7 twist (super rare) barrel with long flash hider pinned by HK to reach the legal 16" barrel length. Factory-installed sight tower with sight/sling eyelets and factory finish. These are...HKP-19344$1,887.95 -
H&K HK P2000 .40 S&W Barrel - Black
H&K Heckler & Koch
$239.95HK factory German P2000 .40 SW 3.62" Barrel This is a great spare or replacement barrel to have on hand. Specifications: .40 S&W Caliber 3.62 inches Genuine Heckler and Koch PartHKP-01127$239.95 -
H&K HK P2000SK .40 S&W - 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. Compatible With: HK P2000SK .40 S&WHKP-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 -
H&K MR556 Slimline Barrel, 16.5"
H&K Heckler & Koch
$779.95Genuine HK MR556 Slimline 16.5" Barrel. Non-chrome-lined for match accuracy. Compatible With: HK MR556HKP-21322$779.95 -
On Sale
HK G36, HK SL8, HK 416, HK MR556 Gas Piston - Black - Incomplete - BLEMISHED
USA
Now: $49.95Was: $79.95HK G36, HK SL8, HK 416, HK MR556 Gas Piston - Black - Incomplete - BLEMISHED INCOMPLETE LIKE SHOWN IN PICTURE. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL...HKP-14540-BNow: $49.95Was: $79.95 -
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 -
MI Blast Can 5/8-24 Thread
MI Midwest Industries
$38.95MI Blast Can 5/8x24 Thread Compatible With: HK 91/G3 HK MR762 HK 23/21/11 HK MSG90 HK PSG1 Specifications: Directs muzzle blast forward on short barrel rifles and pistols. Does not reduce recoil or flash. Constructed from 6061 aluminum, and hardcoat...HKP-21536$38.95 -
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 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 -
RCM HK MP5K & MP5KN 9mm Barrel – Threaded 1/2x32 – 3–Lug
RCM
$299.95RCM HK MP5K & MP5KN 9mm Barrel – Threaded 1/2x32 – 3–Lug Machined from a cold hammer forged blank, this MP5KN (PDW) barrel meets the latest specifications with factory-correct, updated 16 flutes in the chamber. Featuring a three-lug...HKP-20806$299.95 -
RCM MP5 & HK34 9mm Barrel - Threaded 1/2x28
RCM
$204.95RCM MP5 & HK34 9mm Barrel - Threaded 1/2x28 Each barrel is hand-selected from the finest cold hammer forged (CHF) 41V45 steel blanks, expertly profiled and chambered in the desirable 16 flute chamber profile. Finished with a durable...HKP-17762$204.95 -
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 P30, P30S 9mm Barrel - Black
H&K Heckler & Koch
$269.95New HK German P30, P30S Standard 9mm Factory Barrel Brand new factory German HK P30, P30S 9mm Standard Length Barrel - 3.85" Cold hammer Forged, date coded, and proofed barrel.HKP-01828$269.95 -
H&K HK P30L .40 Cal Barrel - Black
H&K Heckler & Koch
$234.95HK German P30L .40 S&W Factory Barrel - German HK Factory German P30L .40 Cal 4.45" barrel perfect for replacement or for that project barrel. Compatible With: HK P30L HK P30, P30S (will be extended from the slide)HKP-02411$234.95 -
H&K HK USPC .45 ACP Barrel - Black
H&K Heckler & Koch
$349.95HK USPC .45 ACP Barrel - Black This item is needed to make a USPC Tactical a standard-length barrel as found on the USPC .45.HKP-02064$349.95 -
Out Of Stock
HKP HK MR556/416 Upper 8" 416C Style Conversion Kit
HKP HK Parts
$1,285.95MR556 & HK416 Upper Conversion Kit - 8" - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 8" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18629$1,285.95 -
On Sale
HKP MP5 40/10 Trunnion - BLEMISHED
HKP HK Parts
Now: $78.95Was: $139.95HKP MP5 40/10 Trunnion - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Machined from ordnance-grade steel and heat-treated to factory specs. Each has...HKP-02737-BNow: $78.95Was: $139.95 -
PTR-32 (7.62x39) Barrel - 16 inch
PTR
$249.95PTR-32 (7.62x39) Barrel - 16 Inch Specifications: 16.25" overall length Chambered in 7.63x39mm Fully Fluted with 12 flutes Match grade Please Note: PTR barrels have a thicker profile, and your front sight tower must be reamed for proper...HKP-02200$249.95 -
RCM HK MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug
RCM
$279.95RCM HK MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug This is the ultimate US-made barrel for any new or conversion build for the MP5 .40 cal. Crafted from top-grade CHF 41v40 material, it’s machined to impeccable standards. With the correct...HKP-21582$279.95 -
RCM HK33/93 .300 BLK 16.1 Inch Barrel - Threaded 5/8x24
RCM
$234.95NCM HK33/93 .300 BLK 16.125 Inch Barrel - Threaded 5/8x24 Each barrel was designed for use with the wildly popular AAC style quick detach muzzle breaks and cans in the 5/8x24 thread pitch. Although, this barrel is perfect for just about any .300 BLK...HKP-17392$234.95