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
B&T APC10, SPC10 Magazine - 30 Round
B&T Brugger & Thomet
$100.00B&T 30 Round APC10/SPC10 Magazine - 10mm Compatible with any G pattern 10mm B&T firearm. Compatible With: B&T APC10 B&T SPC10HKP-21720$100.00 -
On Sale
HK VP9, P30 Enhanced Magazine Extension Kit +7
HKP HK Parts
Now: $51.95Was: $64.95Magazine Extension Kit +7 - HK VP9, HK P30 Our enhanced magazine extension takes our proven design to the next level with innovative grip cuts, ensuring you maintain a secure grasp during rapid magazine swaps even in slippery conditions. Experience the...HKP-21592-MNow: $51.95Was: $64.95 -
On Sale
Harris Bipod Adapter - Picatinny - US
HKP HK Parts
Now: $9.95Was: $33.95Harris Bipod Adapter This mounts to any Picatinny rail and proves a stable platform to add a Harris bipod or other similar-mounting bipods. This will fit any Picatinny spec rail or rail system. Made in the US out of aircraft-grade aluminum and...HKP-21528Now: $9.95Was: $33.95 -
On Sale
HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A3
Nefarious Arms
Now: $504.95Was: $594.95Nefarious Arms HK 416/MR556 10.4" A3 Barrel ***THE BARREL EXTENSION RIM IS MARKED "HAUS" DUE TO AN ERROR BY THE BARREL EXTENSION SUPPLIER. THE MARKING IS NOT VISIBLE ONCE INSTALLED. THESE BARRELS ARE GENUINE NEFARIOUS BARRELS AS NEFARIOUS...HKP-21335Now: $504.95Was: $594.95 -
On Sale
HK416 Gas Block Assembly Tool
Nefarious Arms
Now: $84.95Was: $94.95Nefarious Arms HK 416 Gas Block Assembly Tool A Nefarious Arms creation for those that like to service or replace their 416 gas block. This assembly tool will effortlessly help you assemble or disassemble your 416 gas block by simply aligning the two...HKP-21273Now: $84.95Was: $94.95 -
HK45, HK45C Detent Plate - Variant 5,6,9
H&K Heckler & Koch
$54.95H&K Detent Plate New HK German manufacture safety ONLY detent plate. This detent plate will convert the firearm to safety only with no decocking functions. Compatible With: HK45 HK45 Tactical HK45C HK45C TacticalHKP-02079$54.95 -
HK Mark 23 Firing Pin Block Spring
H&K Heckler & Koch
$9.99HK Mark 23 Firing Pin Block Spring Compatible With: Mark 23 Socom .45HKP-01599$9.99 -
Out Of Stock
HK USP Jet Funnel Floorplate - 9mm, .40 S&W - Steel
H&K Heckler & Koch
$49.95Heckler and Koch Steel Jet Funnel Floor Plate for HK USP 9mm and .40 S&W A great spare and replacement part to have on hand. The HK USP jet funnel floorplate will fit the original style and the new style magazines. Compatible With: USP Please...HKP-01204$49.95 -
HK416, MR556 Threaded Pin for Buttstock Release Inserts - E1, E2
H&K Heckler & Koch
$9.99Heckler and Koch HK MR556/416 Threaded Pin for E1/E2 Buttstock Release Lever Insert New HK German manufactured E1/E2 stock release and tightening screw that takes the slack and slop out of the stock when in desired position. Compatible With: HK MR556 HK...HKP-16604$9.99 -
On Sale
HK G36, SL8 Firing Pin
GSG9
Now: $22.95Was: $28.95HK G36, G36K, G36C & SL8 Firing Pin - USA A must have spare part for all G36 models. Made in the USA. Fully machined and nitrided for superior strength. Compatible With: G36 G36K G36C SL8HKP-18256Now: $22.95Was: $28.95 -
On Sale
HK53 Barrel - .300 BLK - 8.20" - Threaded 5/8x24
RCM
Now: $203.95Was: $239.95RCM HK53 .300 BLK Barrel - Threaded 5/8x24 Each barrel was designed for use with the wildly popular AAC style quick detach muzzle breaks and suppressors with the 5/8x24 thread pitch. Although, this barrel is perfect for just about any .300 BLK suppressor...HKP-13907Now: $203.95Was: $239.95 -
On Sale
HK MP5K Barrel Extension and Faux Suppressor - 9mm - 3 Lug - US
HKP HK Parts
Now: $47.95Was: $59.95HKP MP5K 9mm Fake Suppressor/Barrel Extension - 3-Lug MP5K 3-Lug Barrel Barrel Extension, Fake Suppressor US made MP5K solid aluminum fake suppressor, barrel extension. Slips over the 3-lug MP5K PDW barrel and then pinned in place to meet the overall 16"...HKP-18001Now: $47.95Was: $59.95