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 USP Fiber Optic Rear Sight - Red
Hi-Viz
$49.95Hi-Viz HK USP Fiber Optic Rear Sight - Red Fiber optic sights are becoming more and more popular as they never dim or become aged. Priced right and a great option for those that needs more from their sights. Compatible With: USP Compact 45, 40, 9mm USP...HKP-16941$49.95 -
HK SP5K Spec Only 9mm 2 Position (0,1 Pictogram) FBI Style Grip Trigger Housing
H&K Heckler & Koch
$194.95H&K SP5K Spec 9mm 2 Position (0,1 Pictogram) FBI Style Grip Trigger Housing Upgrade your HK SP5K with this authentic German FBI style grip housing, designed specifically for the SP5K model. Compatible with all HK German ambidextrous trigger packs and...HKP-18307$194.95 -
HK MP5K 3-Position Folding Adjustable Stock
B&T Brugger & Thomet
$494.95B&T HK MP5K 3-Position Folding Adjustable Stock Swiss made B&T folding and length adjustable stock for the HK MP5K and compatible. This is a military grade stock as supplied by B&T to military and law enforcement units world-wide. B&T AG...HKP-18243$494.95 -
HK MR556, MR762 H-Key 11 Rail Segment
HKP HK Parts
$34.95HKP HK MR556/CR556/MR762 H-Key 11 Rail Segment 11 slot rail segment for the new "HKey" style forearms. This rail section is designed to fit and attach to any of the new HKey style forearms now being shipped on the MR556, CR556, MR762 and similar models...HKP-17845$34.95 -
HK MR556 Bolt Head, Complete
H&K Heckler & Koch
$384.95H&K HK MR556 A1 Complete Bolt Head Brand new factory German bolt head with all the components to make the bolt head complete. Compatible With: HK MR556 A1/A4HKP-02712$384.95 -
Out Of Stock
HK416, MR556 M-LOK 9" Handguard
HKP HK Parts
$199.95HK MR556 & HK416 9" M-LOK Forearm Specifications: Weight: 10.2 oz MADE IN THE USA BILLET MACHINED MUCH LIGHTER THAN THE HK FACTORY FOREARM OFFERINGSHKP-17981$199.95 -
HK416, MR556 Firing Pin Catch - Titanium
HKP HK Parts
$49.95HKP HK Parts HK416 and HK MR556 Firing Pin - Titanium Made in the US from grade 6 Titanium. Get the lightest, strongest firing pin available for your HK firearm. Compatible With: HK416, MR556 HK M27HKP-17767$49.95 -
Out Of Stock
HK G36, SL8 Piston Rod Spring
H&K Heckler & Koch
$9.99HK G36 & SL8 Piston Rod Spring A must-have spare repair and replacement part. New HK German factory part. Compatible With: HK G36 HK SL8HKP-01863$9.99 -
Out Of Stock
HK G36 Magazine Spring - 30 Round
H&K Heckler & Koch
$9.95HK G36 30 Round Magazine Follower Spring New German HK G36 30 round magazine spring. A high wear and replacement item. Compatible With: G36 G36K G36C Sl8-G36 conversions that use the G36 magHKP-16363$9.95 -
HK G36K Handguard - Extended - Picatinny Rail
H&K Heckler & Koch
$149.95HK G36K German Factory Picatinny Extended Bottom Rail Fits all HK G36K newer style handguards with the rail attachment points. This is the full-length version for a full-length bottom rail for the G36K forearm. New HK German manufacture.HKP-01137$149.95 -
Out Of Stock
HK G36C, G36K Gas Piston - US Made
USA
$49.95HK G36C/G36K Gas Piston New Tom Bostic US Made G36C & G36K Gas Piston. Counts as one US made compliant part for your SL8 - G36C or G36K style conversion. This is one of the best parts to use on the conversion as it is one of the cheapest ways to get...HKP-17277$49.95 -
HK UMP Parts Kit - .45 ACP - De-Milled - Used
H&K Heckler & Koch
$3,429.95HK German UMP .45 Parts Kit- Used PD Trade-In UMP .45 German parts kit complete with all the factory HK parts minus the receiver. PD trade-ins are in good shape. Click this link to complete your build with an S5 Tactical receiver. Black Ops Defense...HKP-00589$3,429.95