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 MP5K 9mm SEF Navy Style Trigger Housing - Push Pin
H&K Heckler & Koch
$159.95H&K MP5K 9mm SEF Navy Style Trigger Housing - Push Pin HK German factory SEF grip frame that has been cut to MP5K factory German specs. This style of housing is for push-pin firearms that do not require clipped and pinned housing...HKP-02463$159.95 -
HK MP5K, SP89, SP5K Modular Handguard - M-LOK - 9mm
DTAC Dakota Tactical
$159.95DTAC Dakota Tactical 9mm Modular M-LOK Handguard for HK MP5K, SP89, SP5K DTAC Dakota Tactical modular M-LOK handguard for HK MP5K pattern firearms. Made in the USA from T6 aluminum, this lightweight handguard features a slim 1.64 inch diameter, six...HKP-17808-M$159.95 -
Out Of Stock
HK MP5 Bolt Carrier - Semi Auto
RCM
$184.95RCM HK MP5 Semi Auto Carrier New RCM manufactured MP5, 94 F/A carrier with all current "F" style upgrades and tungsten filled for the best performance and the utmost reliability. Machined completely from billet ordnance grade steel to exact HK German...HKP-20981$184.95 -
HK UMP 2 Position Lower Grip Frame
HKP HK Parts
$184.95HKP HK UMP 2 Position Lower Grip Frame Lower grip frame configured for two-position operation. Designed for use with user-supplied internals and suitable for replacement or build use on HK UMP pattern firearms. Commonly used for USC to UMP conversion...HKP-19384-M$184.95 -
HK VP9, VP9SK, VP40 Firing Pin Spring
H&K Heckler & Koch
$9.95H&K HK VP9/VP9SK, VP40 Main Spring For Firing Pin German HK. Compatible With: VP9 VP9 Tactical VP9SK VP40 VP40 TacticalHKP-16829$9.95 -
B&T APC9, APC45 Stock or Brace Adapter - Telescopic
B&T Brugger & Thomet
$650.00B&T APC9 & APC45 Telescopic Brace/Stock Adapter The B&T telescopic brace adapter is an essential accessory to attach your favorite brace to your B&T firearm. Features: Complete adapter solution- no extra parts to buy except the brace...HKP-18989$650.00 -
HK MP5K QD End Cap with Buffer
HKP HK Parts
$44.95Quick Detach MP5K, SP-89 Steel End Cap With Replaceable Rubber Buffer Compatible With: MP5K SP89 Clone or other custom buildsHKP-20117$44.95 -
HK G36C, G36K Gas Piston
H&K Heckler & Koch
$99.95HK German G36C & G36K Gas Piston - Complete New HK German factory G36C and G36K gas piston complete with sealing rings installed. A great spare or replacement part. This is also a popular part for those upgrading to an SL8 to G36K or C barrel length...HKP-00352$99.95 -
Out Of Stock
HK MP5, SP5K Optic Mount - Trijicon RMR - 6.5 MOA
Trijicon
$619.95RMR Optic Mount - Bundle - HK MP5 Includes: (1)Trijicon RMR Type 2 Red Dot Sight 6.5 MOA Red Dot, Adjustable LED (1) MP5 RMR Optic Mount The finest mounting solution to properly mount your RDS on your MP5 or any other receiver that utilizes the...HKP-20734$619.95 -
HK USP Barrel - .45 ACP - 5.09" - Threaded 16x1 LH
RCM
$250.00RCM HK USP .45 ACP Barrel - Threaded 16x1 LH HK USP .45 ACP & HK USP Tactical .45 ACP threaded barrel for use with a wide variety of flash hiders & sound suppressors. This is a special offering as a factory USP Tactical.45 ACP barrel is threaded...HKP-20130$250.00 -
HK P30SK, P2000SK Hammer Spring
H&K Heckler & Koch
$9.95HK German Hammer Spring This spring is used with LEM and all standard models. Compatible With: P2000SK P30SKHKP-02598$9.95 -
HK P30, HK45, USPC Recoil Spring
H&K Heckler & Koch
$18.95New HK German Pistol Recoil Spring This part is ideal for repair or a replacement item as this is a high-wear item. This spring is the factory-correct flat-style compression spring. Compatible With: HK 45C, HK45C Tactical HK USPC .45, USPC Tactical HK...HKP-01673$18.95