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 Dual Folding Stock and Adapter
HKP HK Parts / Strike Industries
$319.95Strike Industries Dual Folding Stock with HKP MP5K Adapter The Strike Industries Dual Folding Stock paired with the HKP MP5K picatinny adapter is one of the best options on the market for those looking for a light, compact folding stock configuration...HKP-21428-M$319.95 -
HK 416, MR556, G36, SL8 Gas Piston
Nefarious Arms
$74.95Nefarious Arms HK G36/SL8/HK 416/MR556 Gas Piston A great spare, upgrade, or replacement part for your HK. Includes 3 piston rings for a complete drop in replacement part. TiN coated for corrosion resistance. Compatible with: HK G36 HK416 HK...HKP-21364$74.95 -
Out Of Stock
HK VP9 Match Barrel - 9mm - Threaded 1/2x28
RCM
$262.50RCM HK VP9 Match 9mm Barrel with Thread Protector - Threaded 1/2x28 Precision replacement barrel produced by RCM for the HK VP9 Match pistol. This barrel features a threaded muzzle for suppressors or other muzzle devices. Installs as a direct...HKP-21069$262.50 -
HK UMP, USC, G36 Flat Trigger
HKP HK Parts
$99.95HKP HK UMP/USC & G36 Flat Trigger Our flat trigger has spaced out serrations at the face of the trigger for a superior grip. Chamfered edges prevent the trigger face serrations from cutting into the operator's hands over prolonged range sessions...HKP-20766-M$99.95 -
HK G36C Quad Rail Handguard
B&T Brugger & Thomet
$269.95B&T handguard Quad Rail for HK G36C Swiss made B&T quad-rail (4 picatinny rails one for each side) handguard for HK G36C. Aluminum version with rail cover and sling swivel. This is the absolute best quality railed handguard available for the HK...HKP-16896$269.95 -
HK MP5, MP5K Semi Auto Ambidextrous Trigger Pack
HKP HK Parts / Heckler & Koch
$299.95H&K MP5/K 9mm Semi-Auto Ambidextrous Trigger Pack Each Trigger pack is fully assembled and ready to drop in your Ambi FBI, Navy pictogram housing. All parts are German HK with the exception of the trigger pack box and the 9mm ejector lever...HKP-19867$299.95 -
HK USP Magazine Locking Plate - 9mm / .40 S&W - High Capacity
H&K Heckler & Koch
$6.95HK USP 9mm / .40 S&W High Capacity Magazine Locking Plate Compatible With: HK USP 9mm HK USP .40HKP-02165$6.95 -
HK G36C, G36K Gas Piston - US
GSG9
$74.95GSG9 complete gas piston for HK G36C and G36K - US made This is a popular part for those upgrading to an HK SL8 to HK G36K or HK36C barrel length. Each piston counts as one 922r compliant part. Made in the USA. Features: New USA manufactured gas piston...HKP-18253$74.95 -
HK33, HK33K, HK93 Recoil Spring
H&K Heckler & Koch
$8.95HK German factory HK 93, 33 & 33K Replacement Recoil Spring Compatible With: HK 93 HK33 HK33K Clones or other custom buildsHKP-02097$8.95 -
HK MP5K Trigger Group - Burst 0,1,3,F
H&K Heckler & Koch
$3,299.95Heckler and Koch HK MP5K 4 Position (0,1,3,F) Burst Trigger Group New HK German factory fresh 9mm MP5K 4 position burst trigger group. Each unit comes just as it comes from the factory in Germany and is complete with trigger pack, left and right selector...HKP-00403$3,299.95 -
HK MP5, MP5F Recoil Rod Assembly
HKP HK Parts
$49.95MP5 F, MP5 40/10 Recoil Spring Rod Assembly Complete - Extra Power This is the correct MP5F or MP5 40/10 Recoil Rod assembly with the proper parts and size. Most commonly used for MP5's that are using +P or +P+ ammunition or any high impulse 9mm. Or for...HKP-17833$49.95 -
HK Extended Right Side Ambidextrous Selector Lever
H&K Heckler & Koch
$59.95HK German Right Side Ambidextrous EXTENDED (ESSL) Lever New German HK extended selector lever for the right side of all ambidextrous trigger packs. Works with all ambi left side HK selector levers. Compatible With: MP5, 94 MP5 clone and custom...HKP-18875$59.95