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 G36C Gas Piston Rod and Spring
H&K Heckler & Koch
$89.95HK German G36C Gas Piston Rod & Spring Assembly - Complete A must-have item for HK G36C conversions from G36 to SL8's or for spares for your G36C. New HK German factory OEM part. A high wear and replacement part and a must-have for spare parts.HKP-00353$89.95 -
HK G36/SL8 Quad Rail Handguard
B&T Brugger & Thomet
$379.95B&T Handguard Quad Rail For HK G36 and SL8 New B&T Swiss manufactured G36 and SL8 quad rail system. Each unit comes with the complete quad rail as well as the rail covers and sling swivel for a sling. Compatible With: HK G36 (Not...HKP-16897$379.95 -
HK91, G3 Buffer Spring - Surplus
H&K Heckler & Koch
$4.95HK G3, 91 Buffer Spring - Surplus This is the factory buffer spring for the rear stock buffer found on the G3, HK91, 93 A2 style stocks. This is a used excellent shape spring. A great replacement to have on hand for your worn out buffer spring...HKP-20319$4.95 -
HKP HK MP5 40 Locking Roller +4
HKP HK Parts
$11.95HK US MP540 Undersized Locking Roller, +4 The proper roller size is essential for proper headspacing of bolt gap. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to remember the size you need...HKP-17562$11.95 -
HK45, HK45 Compact, P30, P30L Hammer Bearing
H&K Heckler & Koch
$14.95HK 30, P30L, 45, & 45C Hammer Bearing Compatible With: HK P30 HK P30L HK45 HK45 Compact Please Note: This item does not have the lockout device built in for those that prefer NOT to have the lockout feature.HKP-01800$14.95 -
Streamlight TLR-4 Tactical Light & Laser Combo - Red
Streamlight
$209.95Streamlight TLR-4 Tactical Light & Laser Combo - Red Features: Features C4 LED technology and a 640-660nm red laser 5300-candela peak beam intensity; 170 lumens Runs 1.5 hours to the 10% output level (LED only or LED and laser); 11 hours...HKP-08538$209.95 -
HK45, HK45 Compact, USP, USP Compact .45 ACP Trigger Bar
H&K Heckler & Koch
$44.95New HK German Factory Trigger Bar Compatible With: HK USP 45, USP .45 Tactical HK USP Compact .45 HK 45, HK45 Tactical HK45C, HK45C TacticalHKP-01255$44.95 -
HK USP Decocking Lever - Left Side V1/5/9
H&K Heckler & Koch
$59.99H&K HK USP Left Side V1/5/9 Decocking Lever A Heckler and Koch genuine part. This item allows a right-handed shooter to have the safety and or decocking functions on the LEFT side of the firearm. This is to be used in conjunction with the correct...HKP-01169$59.99 -
HK USP Raised Tactical Front Sight
H&K Heckler & Koch
$29.95H&K HK USP Raised Tactical Front Sight Compatible With: USP 9mm USP .40 USP .45 USP Tactical models USP Expert modelsHKP-01403$29.95 -
HK UMP Release Lever
H&K Heckler & Koch
$9.95HK UMP Catch Release Lever Or Trip Lever For All UMP LowersHKP-01890$9.95 -
Out Of Stock
HK G3 Operators Manual
HKP HK Parts
$21.95HK G3, 91, PTR Operators Manual The G3 Operators Manual is for the Full Auto version of the HK91. Page-by-page translation of the original German Army instruction manual for the G3 family of firearms. With 120 pages and six full-color illustrations...HKP-15211$21.95 -
Handguard Rail Screw - Tactical
PTR
$0.69PTR Tactical Handguard Rail Screw The 6, 4, 3 & 2 inch rail sections use these screws to attach themselves to the tactical forearm. This is the screw that is used on all the tactical forearm rails (2 inch, 3 inch, 4 inch, 6 inch). A great spare to...HKP-16744$0.69