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 CC9 Firing Pin Spring Retainer
H&K Heckler & Koch
$5.95H&K CC9 Firing Pin Spring Retainer Manufactured in Germany by H&K, this part secures the firing pin spring to the firing pin assembly, ensuring proper striker function during cycling. Compatible With: HK CC9HKP-22139$5.95 -
HK VP9 Slide Release Lever - Left - Anti-Skid
H&K Heckler & Koch
$74.95H&K VP Anti-Skid Slide Release Lever - Left Left side extended slide release lever. Can be combined with 260498, 50254710, 50239708. Compatible with: VP9 VP9L VP9 Match VP9 Tactical VP9SK VP9A1 VP40HKP-22011$74.95 -
On Sale
HK416, MR556 Stabilizing Brace - SBA3 5 Position Adjustable
SB Tactical
Now: $92.95Was: $109.95SB Tactical SBA3 5 Position Adjustable Stabilizing Brace The SBA3™ is a minimalist, 5-position adjustable stabilizing brace designed for platforms that accept a mil-spec carbine receiver extension (not included). It features an integral...HKP-21927Now: $92.95Was: $109.95 -
On Sale
HK MP5 Trunnion - Gunsmith Special
USA
Now: $24.95Was: $54.95HK MP5 Trunnion - Gunsmith Special US made HK MP5 trunnions sold as-is. Will require work before being functional. We recommend the work be performed by a professional gunsmith. The condition will vary from part-to-part vs. the pictured unit. Compatible...HKP-99089Now: $24.95Was: $54.95 -
On Sale
HK USP Magazine Extension - 9mm - +7 Round
HKP HK Parts
$55.95 - $69.95HK Parts Magazine Extension for your HK USP or HK USPT 9mm +7 Magazine Extension Easy to install. Simply add the mag extension to your existing mag body and follower. No gunsmithing required. Made in the US from aircraft-grade hard coat anodized aluminum...HKP-21841-M$55.95 - $69.95 -
Out Of StockOn Sale
HK417, MR762 Double Magazine Pouch
H&K Heckler & Koch
Now: $29.21Was: $129.95H&K HK 417 Double Magazine Pouch Factory HK double magazine pouch for the HK 417 and MR762 platforms chambered in .308/7.62x51. Compatible With: HK 417 MR762HKP-21800Now: $29.21Was: $129.95 -
On Sale
HK MP5 QD End Cap with Buffer - Black - BLEMISHED
HKP HK Parts
Now: $49.95Was: $99.95HK MP5 QD End Cap with Buffer - Black - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. With this MP5 QD end cap upgrade you will get a heavier buffer...HKP-20118-BNow: $49.95Was: $99.95 -
Picatinny Optic Mount - 39mm - Skeleton Mount - Aimpoint ACRO
B&T Brugger & Thomet
$150.00B&T 39mm QD Skeleton Mount for Aimpoint ACRO The B&T QD "Skeleton" mount for Aimpoint® Acro offers a 39mm elevated profile for improved sight alignment, ideal for night vision setups requiring clearance over forward-mounted IR devices. Its...HKP-21730-M$150.00 -
On Sale
Carbon-Cleaner - 150 ml Pump
SchleTek
Now: $14.95Was: $16.95SchleTek Carbon Cleaner 150 ml Pump SchleTek Carbon Cleaner is a powerful, fast-acting solution designed to remove stubborn carbon buildup from firearms, suppressors, bolts, gas systems, and other precision components. Its advanced formula penetrates...HKP-21729Now: $14.95Was: $16.95 -
On Sale
HK MP5 Stock With Direct Fit Adapter
HKP HK Parts / Magpul
Now: $149.95Was: $189.95HK MP5 Stock With Direct Fit Adapter MP5 DT Magpul stock ready to install on any in-spec MP5 receiver or clone. We take our AR MP5 Adapter and attach it onto a mil-spec buffer tube before combining it with the new Magpul DT Carbine stock. This is a great...HKP-21402-MNow: $149.95Was: $189.95 -
On Sale
B&T Angled Foregrip - Picatinny
B&T Brugger & Thomet
Now: $63.95Was: $71.99B&T Angled Foregrip - Coyote Tan - Picatinny Mount For those shooters who prefer an angled foregrip, this grip is the perfect solution. The lugs at the end of the grip assure a firm rest for the supporting hand. The grip can be mounted easily onto...HKP-21392Now: $63.95Was: $71.99 -
Out Of Stock
HK MP5 Magazine Locking Plate - 30 Round
KCI
$3.49KCI HK MP5 Locking Plate Spare locking plate for KCI MP5 30 round magazines. Compatible With: HK MP5HKP-21377$3.49