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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HK53 Frangible Ammunition Adapter - 15x1
H&K Heckler & Koch
$149.95New HK 53 Factory 4 Prong Frangible Ammunition Adapter - 15x1 RH Get your hands on one of the last HK factory frangible adapters while we still have remaining inventory of this limited item. This part is no longer in production so once they are...HKP-16978$149.95 -
On Sale
HK MP5K Bolt Carrier - Full Auto - .40 S&W, 10mm
RCM
Now: $125.95Was: $157.95MP5K 40/10 Full Auto Bolt Carrier - Latest Upgraded Version This part is built from billet ordnance steel. This US-made MP5K 40,10 style carrier is made with Tungsten and is heat-treated, providing the finest American-made carrier...HKP-01826Now: $125.95Was: $157.95 -
On Sale
HK MP5 Parts Kit - .40 S&W
HKP HK Parts
Now: $2,367.95Was: $2,959.95HK MP5 .40 Pistol German Parts Kit - Used. Genuine German HK MP5 40 parts kit in the pistol configuration Includes: Barrel - 3 lugged & threaded, cold hammer-forged Trigger Group - Ambidextrous Navy 0,1, F Trigger Group or SEF Navy your choice A1...HKP-16719Now: $2,367.95Was: $2,959.95 -
On Sale
HK MP5 German Parts Kit - .40 S&W - A2 Stock
HKP HK Parts
Now: $3,581.95Was: $3,979.95HK MP5 40 S&W A German Parts Kit - Used Includes: Barrel - 3 lugs, threaded, and cold hammer-forged Trigger Group - Ambidextrous Navy 0,1, F Trigger Group A2 Fixed Stock Bolt Group Mp5 40 F/A Forearm - Standard wide black polymer Rear Sight...HKP-00891Now: $3,581.95Was: $3,979.95 -
Out Of Stock
HK MP5K Trigger Housing - 3 Position Navy Style - Clipped and Pinned - .40 S&W, 10mm
H&K Heckler & Koch
$0.00H&K MP5K 40/10 3 Position Navy Style Housing - Clipped & Pinned This lower housing is clipped and pinned for use on a semi-auto receiver shelves. For more information on our clipping and pinning, see our services section. We offer the best...HKP-15454$0.00 -
On Sale
HK MP5F Bolt Group - Complete
H&K Heckler & Koch
Now: $2,448.95Was: $2,999.95H&K MP5 F Bolt Group Complete The bolt head, bolt carrier, and all F/A-related parts have been restricted by HK and will become increasingly harder to find. The F in the MP5F designation was added after the French Military asked HK to "beef"...HKP-00953Now: $2,448.95Was: $2,999.95 -
On Sale
Tikka 412, 512 Optic Mount, Aimpoint
B&T Brugger & Thomet
Now: $99.95Was: $199.95B&T TikKa Valmet 412 Scope Mount Specifications: Color: Black Height max: 11 mm Length max: 157 mm Length of top rail: 157 mm Material: Aluminum NATO Accessory Rails: 1 Part number: BT-10178 Treatment: Hardcoat anodized Weight: 78 g Width max: 25 mmHKP-17432Now: $99.95Was: $199.95 -
Out Of StockOn Sale
HK USP Magazine with Standard Floorplate - .45 ACP - 10 Round - USED
H&K Heckler & Koch
Now: $44.95Was: $54.95HK USP Magazine with Standard Floorplate - .45 ACP - 10 Round - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Perfect for those who live in states that require 10-round magazines or those that...HKP-02366-USEDNow: $44.95Was: $54.95 -
On Sale
HK91, G3 Trigger Pack - Semi-Auto - Ambi
HKP HK Parts / Heckler & Koch
Now: $262.95Was: $349.95HKP Ambidextrous Semi-Auto Trigger Pack for HK91 and G3 - .308 HKP ambidextrous semi-auto trigger pack for HK91 and G3 pattern rifles in .308. Built from USA and German components, this steel trigger pack comes assembled and ready to install for...HKP-22855Now: $262.95Was: $349.95 -
On Sale
HK416, MR556 Buffer Spring - Enhanced - USED
H&K Heckler & Koch
Now: $9.95Was: $23.95HK416, MR556 Buffer Spring - Enhanced - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. It is a high-wear item and a...HKP-00039-USEDNow: $9.95Was: $23.95 -
On Sale
HK21, HK21E, HK11A1 Extractor Rebuild Kit - 21E and RCM 21-H Bolt Head
RCM
Now: $67.95Was: $79.95RCM Extractor Rebuild Kit for HK21, HK21E, HK11A1 and RCM 21-H Bolt Heads Extractor rebuild kit for RCM HK21, HK21E, and HK11A1 21-H bolt heads. Made in the USA from steel, this kit is designed to refresh extractor-related wear components...HKP-22834Now: $67.95Was: $79.95 -
Out Of StockOn Sale
Sig MCX Carbine Handguard - Suppressor Compatible
Sig Sauer
Now: $87.97Was: $179.00SIG MCX Carbine Suppressor Compatible Handguard - KeyMod - Black SIG MCX carbine handguard built for suppressor-compatible setups. Constructed from aluminum, this discontinued KeyMod handguard offers a lightweight, factory-style option for carbine builds...HKP-99493Now: $87.97Was: $179.00