Parts
At HK Parts, we offer a wide range of high-quality Heckler and Koch accessories and components for your favorite firearms. Whether you are upgrading a Heckler and Koch pistol or rifle, or building with parts kits, we have you covered. Explore top-rated components for VP9, USP, P30, MP5, MP5K, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, find the parts you need to enhance performance, reliability, and function.
Popular upgrades include match triggers, threaded barrels, compensators, optic plates, and extended magazines. Rifle owners often add enhanced stocks, forearms, and ambidextrous controls.
MP5 and MP5K kits are top sellers, giving shooters authentic components for iconic builds. G36 and HK416 kits are also highly sought after by collectors and professionals alike.
HKP offers the world’s largest H&K-focused catalog, with better availability, faster fulfillment, and expert support compared to general retailers.
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HK Pistol O-Ring - Barrel - .40 S&W
H&K Heckler & Koch
$4.95New HK German Black .40 Cal Barrel O-ring For All .40 Caliber Threaded Barrels This factory part is a high wear and replacement item as the O-ring provides the seal between the slide and the barrel,...HKP-02126$4.95 -
Out Of Stock
B&T Sling Swivel - Universal Picatinny Attachment
B&T Brugger & Thomet
$15.95B&T Sling Swivel - Universal Picatinny Attachment Designed for H&K snap-hooks, and mounts to any M1913 Picatinny Rail. Strong non-marring silent attachment point. SpecificHKP-16893$15.95 -
Out Of Stock
HK MR556, MR762 A4 Safety Lever - Left
H&K Heckler & Koch
$12.95H&K MR556/MR762 A4 Safety Lever - Left Left-side selector lever for MR-series ambidextrous safety systems.HKP-21965$12.95 -
Picatinny - Dual Folding Adapter - Stabilizer
Strike Industries
$197.99Strike Dual Folding Adapter - Stabilizer This new stabilizer is the perfect option for the MP5 or MP5K platform that utilizes a 1913 picatinny back plate. For a quick and easy ambidextrous folding...HKP-21288$197.99 -
On Sale
HK USP Full Size Optic Plate - DeltaPoint Pro, Eotech EFLX - Red Dot Pistol Sight
Evolution Gun Works
Now: $41.21Was: $49.95DELTAPOINT PRO SIGHT MOUNT FOR HK USP (FITS SHIELD RMS / RMSC / SMS | JPOINT | REDFIELD ACCELERATOR | AND OPTIMA) Included: Mounting hardwareHKP-20046Now: $41.21Was: $49.95 -
HK UMP Barrel - .45 ACP - 7.87" - Threaded 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...HKP-02634$349.95 -
HK91, G3 Slimline Handguard - OD Green - Used
H&K Heckler & Koch
$14.95H&K 91/G3 (7.62x51/.308) Slimline Forearm - OD Green - Used This is a used German Military surplus OD green Slimline Forearm with a heat shield. Each forearm is in good condition and can be restored...HKP-16265$14.95 -
Out Of Stock
HK33, HK53, HK93, HK91, G3 Central Stock Section With Butt Pad
PTR
$99.95U.S. HK 91, G3, PTR Central Stock Section Black With Butt Pad Compliant parts are hard to find and are important for keeping your HK G3, HK 91, HK33, and 93 build 922r compliant. Compatible With:HKP-00379$99.95 -
On Sale
HK416, MR556, AR-15 Buffer Tube Castle Nut
USA
Now: $8.00Was: $9.99AR-15 Castle Nut for Buffer Tubes - US Made Steel Castle-nut for AR buffer tubes fits both mil-spec and commercial buffer tubes alike. Compatible With: HK416, MR556HKP-02729Now: $8.00Was: $9.99 -
On Sale
Firearm Cleaning Oil - Break Free CLP - .5 oz
Safariland
Now: $3.97Was: $4.95Break Free Cleaner, Lubricant and Preservative 1/2 OZ. Features: Penetrates and spreads along metal surfaces into every, crack, pit and crevice to undercut contamination and lift. carbon, fouling...HKP-15435Now: $3.97Was: $4.95 -
On Sale
Sig Sauer P320 Nitron Compensator - 9mm
HKP HK Parts
Now: $74.96Was: $189.95HKP SIG P320 Compensator - Nitron 9mm Our P320 Nitron compensator reduces recoil and muzzle flip. Each unit is 100% US made and finished in durable black cerakote. Our Nitron compensator features...HKP-21300Now: $74.96Was: $189.95 -
On Sale
Link Anchor Poly Handstop
Strike Industries
Now: $15.96Was: $19.95Strike Industries Link Anchor Poly Handstop The LINK Anchor Handstop is made from a heat-resistant polymer that allows comfortable grip in any shooting condition. It has a low profile design that...HKP-19645Now: $15.96Was: $19.95