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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On Sale
HK G36, SL8 Cocking Handle Axle Pin - USA
USA
Now: $6.98Was: $10.95HK G36, SL8 Cocking Handle Axle Pin - US Made This is the rivet pin that is used to attach the swiveling cocking handle to the body of the carrier. These can be replaced as they break and wear...HKP-18367Now: $6.98Was: $10.95 -
Out Of Stock
HK91, G3 - 15 Round Magazine
H&K Heckler & Koch
$59.95HK G3, HK 91, PTR91 - 15 Round Magazine The HK G3, 91, PTR magazine is made by PTR from a German aluminum HK magazine and converted to 15 rounds. Perfect for states such as NJ that only allow a 15...HKP-17006$59.95 -
HK91, G3 Handguard - Slimline Style- Used Surplus
H&K Heckler & Koch
$14.95Used Authentic German Military Surplus Black Slim Line Forearm With Heat Shield In used condition. For the money, these are a nice addition to the collection. Compatible With: All full forearm...HKP-18315$14.95 -
Out Of Stock
PTR Standard Stock Buttpad
PTR
$39.95HK U.S. Made Standard Stock Butt pad Perfect for A2 fixed stocks. This item is hard rubber and softer than a factory standard butt pad - that is hard plastic only and prone to cracking. Super durable...HKP-00375$39.95 -
Out Of Stock
HK33, HK53, HK93 Magazine Spring - 25 Round
H&K Heckler & Koch
$11.95HK 93, 33, & 53 Magazine Replacement Spring For 25-Round Magazines Hard to find and a must-have spare for your HK mags. No longer in production.HKP-00483$11.95 -
HK MP5, SP5 4 Position 0,1 Trigger Group - Universal Trigger group
H&K Heckler & Koch
$1,999.95H&K MP5, SP5 4 Position 0,1 Trigger Group - Universal Trigger group New HK German MP5, SP5 9mm 4 Position Burst (0,1,3, F) Trigger Housing professionally clipped & pinned and paired with a factory...HKP-16725$1,999.95 -
HK MP5 Barrel - 9mm - 8.85" - 3 Lug
RCM
$149.95RCM HK MP5 9mm Barrel - Non-Threaded 3-LugHKP-02040$149.95 -
HK MP5 Handguard - Single Rail
B&T Brugger & Thomet
$199.95B&T Brugger and Thomet Single Rail Handguard for HK MP5 The MP5 from Heckler & Koch is one of the most widely used submachineguns. B&T offers a selection of handguards for the MP5, the MP5SD and...HKP-16903$199.95 -
HK MP5, SP5K Rear Sight Set, Complete - Used
H&K Heckler & Koch
$109.95HK Heckler and Koch German Rear Sight Set Complete - Used for HK MP5 and HK94 Taken from demilled MP5's. Includes the entire rear sight assembly and hardware set for the complete rear sight assembly...HKP-00671$109.95 -
HK MR556 A4 Hammer Spring
H&K Heckler & Koch
$5.95H&K MR556 A4 Hammer Spring Genuine H&K hammer spring for the MR556 A4. Compatible With: HK MR556 A4HKP-22083$5.95 -
HK VP9 Optic Plate - Holosun 509T - Red Dot Pistol Mount
H&K Heckler & Koch
$50.95H&K VP9 509T Optic Plate This precision-machined mounting plate allows secure attachment of the Holosun 509T red dot sight to the H&K VP9 optics-ready slide. Built from durable materials, it ensures...HKP-21913$50.95 -
HK USP Conversion Barrel - .40 S&W to 9mm - Threaded - 13.5x1
RCM
$214.95RCM HK USP .40 to 9mm Conversion Barrel - Threaded - 13.5x1HKP-21789$214.95