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 MP5 Flash Hider - 3 Lug - .40 S&W, 10mm
H&K Heckler & Koch
$199.99HK Heckler and Koch's Flash Hider with 3-Lug Connection Fits all factory in-spec 3 Lug MP5 40,10 Barrels. Specifications: Made In Germany 3-Lug Compatible With: MP5HKP-00442$199.99 -
HK MP5 A3 Retractable Buttstock Bushing
H&K Heckler & Koch
$14.95HK MP5 A3 Retractable Stock Cap, Bushing- MP5 Navy Stock Newer 2 generation stock cap bushing for the factory MP5-N series of A3 stocks.Not for use on the 1st generation all metal (70-80's) A3 retractable stocks. Not for use on the 3rd generation of MP5...HKP-16405$14.95 -
HK91, G3 Magazine Release Set, Complete - USED
H&K Heckler & Koch
$24.95Heckler and Koch Magazine Release Set (Left to Right) for HK91 and G3 This HK German manufactured, used magazine release set for HK .308 pattern rifles consists of 6 pieces. Complete left-to-right mag catch assembly with both push-button and paddle...HKP-22466$24.95 -
On Sale
HK MP5, MP5K Locking Piece - 100 Degree - Gunsmith Special - BLEMISHED
HKP HK Parts
Now: $9.95Was: $33.95HKP MP5, HK94 & MP5K 100 Degree Locking Piece - Gunsmith Special - BLEMISHED GUNSMITH SPECIAL. THESE UNITS WILL NEED RE-WORK BEFORE USE. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Please Note: Will...HKP-18049-BNow: $9.95Was: $33.95 -
Out Of Stock
HK USP Conversion Barrel - .40 S&W to 9mm - Threaded - 1/2x28
RCM
$214.95RCM HK USP .40 to 9mm Conversion Barrel - Threaded - 1/2x28 This 9mm conversion barrel is a drop-in replacement that allows your USP to shoot the popular 9mm cartridge. It has the standard 1/2x28 thread and comes with a thread protector...HKP-21787$214.95 -
Out Of StockOn Sale
HK21 Drum Hanger
HKP HK Parts
Now: $164.95Was: $195.95HKP HK21 Drum Hanger Our HK21 drum hanger is precisley machined from 4140 billet steel, heat-treated to 50 Rockwell, and parkerized for a durable finish. A lower cost alternative to the discontinued factory hanger, the HK Parts drum hanger is built for...HKP-21453Now: $164.95Was: $195.95 -
On Sale
HK Single Point Leather Sling - Black
HKP HK Parts
Now: $39.95Was: $49.95Single Point Leather Sling - Black Our leather sling utilizes two HK style sling hooks to attach to a single mounting point. Designed to replicate the original, out of production, German HK offering. Each sling is handcrafted in the US by a German...HKP-20151Now: $39.95Was: $49.95 -
On Sale
HK VP9, OR International Holster - Button Comp Carry
Comp-Tac
$63.95 - $67.95Comp-Tac HK VP9/OR International Button Comp Carry Holster At last a custom made Comp-Tac International OWB holster for your HK pistol that allows you to have the Rail Mount Compensator, Comp Weight, or Match Weight installed. Manufactured by the best...HKP-20053-M$63.95 - $67.95 -
Out Of Stock
Picatinny Rail Cover - 45mm
H&K Heckler & Koch
$14.95H&K 45mm Picatinny Rail Cover - Universal New factory HK rubberized picatinny rail cover. Specifications: Rail cover dimensions: 45x26x7 mm Compatible With: HK picatinny rails Other Picatinny railed applicationsHKP-18857$14.95 -
On Sale
HK VP9SK Compensator - Quick Detach
HKP HK Parts
Now: $92.95Was: $149.95Comp Weight™ Compensator- Quick Detach - HK VP9SK - HKP Easy on, easy off- Quick Detach technology The HK Parts VP9SK Comp Weight™ is the world's first quick detach Comp Weight™, compensator. That slides effortlessly onto your pistol...HKP-18151Now: $92.95Was: $149.95 -
HK416, MR556, HK417, MR762 Handguard Locking Screw
H&K Heckler & Koch
$16.95HK416, MR556, HK417, MR762 - Handguard Locking Screw Replacement handguard locking screw that secures the handguard to the upper receiver. Compatible With: HK HK416 HK MR556 HK HK417 (2 required per handguard) HK MR762 (2 required per handguard)HKP-16601$16.95 -
Out Of Stock
HK VP9, P30, HK45C HD XR Night Sight Set - Orange Front Outline
Trijicon
$169.95Trijicon HK VP/45C/P30 HD XR Night Sight Set - Orange Front Outline The Trijicon HD XR Night Sights were specifically designed with the ever-evolving challenges of law enforcement agencies in mind. Building on the features of the current HD Night Sights,...HKP-18270$169.95