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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Out Of Stock
Picatinny Optic Mount - RMR, SRO
Trijicon
$109.95Trijicon Low Picatinny Rail Mount for RMR/SRO - RM33 Low Picatinny rail mount for RMR/SRO. Includes: Mount Optic mounting screws Distance From Top of Mounting Rail to Optical Axis: RMR: 0.768" SRO: 1.009" Slimline mounts, fits Picatinny railHKP-20335$109.95 -
On Sale
HK VP9, VP40 Competition Magwell Extension
HKP HK Parts
Now: $69.95Was: $129.95HKP HK VP9, VP40 Competition Magwell Extension Our 2-piece, steel insert competition VP9/VP40 extended flared magwell is CNC made from heat treated 4140 billet nitrided steel. The upper portion of the magwell is machined from aircraft-grade aluminum and...HKP-21079-MNow: $69.95Was: $129.95 -
HK MP5K Folding Stock w/ Adapter
$269.95German Folding Stock with HK Parts Adapter - MP5K German folding stock with MP5K HK Parts Adapter. The HK Parts adapter offers a QD attachment point and is made from hard coat anodized aluminum. Compatible With: MP5K SP5K In spec clonesHKP-19550$269.95 -
Out Of Stock
HK USPC, P2000 Magazine Housing - .40 S&W - 12 Round
H&K Heckler & Koch
$29.95H&K 12 Round HK P2000/USPC .40 S&W Magazine HousingHKP-16538$29.95 -
HK USPC, USPCT Barrel - .45 ACP - 4.46" - Threaded 16x1 LH
H&K Heckler & Koch
$301.95H&K USPC .45 ACP Barrel - Threaded 16x1 LH This H&K USPC .45 ACP barrel features a threaded 16x1 LH design, ideal for enhancing your firearm. Made from cold hammer-forged steel with polygonal rifling, it ensures durability and precision. The...HKP-00320$301.95 -
HK UMP, USC Recoil Rod Assembly, Complete
H&K Heckler & Koch
$79.95HK USC/UMP 45/40/9mm Recoil Spring/Rod Assembly New HK German. This is great to have as a spare as this is a repair and replacement item. Compatible With: HK UMP 45 HK USC 45 HK UMP 40 HK UMP 9mmHKP-00610$79.95 -
HKP HK G3 Operator Depot Level Repair Manual
HKP HK Parts
$23.95HKP HK G3 Operator Depot Level Repair Manual This is an older repair manual and the difference is the sections on field and depot repair. This manual has 124 pages, 35 pages of explanations, instructions, and pictures of the depot-level repair and...HKP-15223$23.95 -
HK CC9 Grip Frame
H&K Heckler & Koch
$29.99Heckler and Koch CC9 Grip Frame Factory HK CC9 grip frame. Made from high-strength polymer with molded texturing for durability and enhanced control. Compatible With: HK CC9HKP-22206$29.99 -
HK MP5, SP5 Handguard - SD Style Conversion
HKP HK Parts
$279.95HK Parts Handguard Conversion HK MP5SD Convert your standard MP5 to the iconic SD-style look with this HKP MP5SD handguard conversion. Designed for aesthetics only, this drop-in handguard gives your MP5 the suppressed MP5SD appearance without requiring...HKP-22091$279.95 -
HK SL8, G36 Magazine Release Spring - US
GSG9
$4.95HK G36 & SL8 Magazine Release Spring - USA Mag release spring for all G36 & Sl8 models. A must have spare part. Made in the USA. G36 G36K G36K SL8 Other custom G36 type buildsHKP-18254$4.95 -
HK MP5, HK91, G3 Binary Trigger Group - SEF Navy - BFSIII
FA Franklin Armory
$849.95Franklin Armory BFSIII HK-C1 - Trigger Group - SEF Navy Style - HK91, G3, PTR91 3 Position HK Binary Trigger Group Binary triggers count as 4 922r compliant components. The components that count towards 922r compliance include the trigger pack box,...HKP-19646-CP$849.95 -
HK USP Adjustable Rear Sight
H&K Heckler & Koch
$135.95H&K HK USP Adjustable Rear Sight HK German adjustable rear sight for use with HK USP full size pistols Compatible With: HK USP .45 HK USP .40 HK USP 9mm HK USP Tactical .45 HK USP Tactical .40 HK USP Tactical 9mm All HK USP full size models All HK...HKP-17361$135.95