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
HK416, MR556 Rail System - 10.5" - Super Modular - FDE
Geissele
Now: $449.95Was: $499.95Geissele HK416, MR556 10.5" Modular Rail - Desert Dirt Color (DDC) 9.7 " Extended HK 416 free float rail for use with all HK 416 & MR556 uppers.Please note: On the HK416 models the sling attachment point on the gas block will need to be...HKP-16460Now: $449.95Was: $499.95 -
HK USC Locking Lever Axle - .45 ACP
H&K Heckler & Koch
$29.95HK USC Lower Locking Lever Axle A great item to have on hand as spares. New German HK. Compatible With: All USC lowersHKP-16376$29.95 -
On Sale
HK UMP Barrel - 9mm - Threaded with 3 Lug
Michaels Machines
Now: $466.95Was: $549.95HK UMP 9mm Barrel - Threaded - 3-Lug Specifications: 3Lug Threaded Compatible With: UMP 9mmHKP-02278Now: $466.95Was: $549.95 -
HK91, G3 Match Trigger Group - Sniper
H&K Heckler & Koch
$749.95HK German SEMI .308 Trigger Group Complete For G3, 91 & PTR Models The HKP match trigger group starts life as a standard 12lb stock trigger pack before being carefully converted by the legendary trigger gunsmith, Bill Springfield. The result, a...HKP-17031$749.95 -
On Sale
PTR-32 Locking Piece - 65 degree
PTR
Now: $56.95Was: $67.95PTR-32 (7.62x39) Locking Piece - 65 degree New PTR Locking Piece For PTR-32. Marked "32" for the PTR-32 series of rifles and pistols. This is a 65 degree locking piece. New PTR manufacture. This locking piece will also work for custom HK builds as well.HKP-18520Now: $56.95Was: $67.95 -
Out Of Stock
HK MP5 Magazine Follower Bolt Catch Screw - Threaded - .40 S&W, 10mm
H&K Heckler & Koch
$34.95Heckler and Koch Threaded Bolt Catch for Magazine Follower for your HK MP5 40,10 This is the small threaded screw that fits into the bolt-hold-open axle and makes contact with the magazine follower to activate the bolt-hold-open. A small but...HKP-00454$34.95 -
HK MP5 Locking Roller -2 - .40 S&W, 10mm
H&K Heckler & Koch
$19.95H&K Heckler and Koch -2 roller HK German for HK MP5 40/10 Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production. Please Note: The price listed is per...HKP-00336$19.95 -
HK MP5 Barrel - .40 S&W - Threaded 9/16x24 with 3 Lug
HKP HK Parts
$249.95HKP HK MP5 .40 S&W Barrel - Threaded 9/16x24 - 3-Lug Newly manufactured US Made MP5 .40 S&W barrel that is 3-lugged and threaded with matching thread protector. This is a barrel offering that is made to the highest standards and tolerances and...HKP-16402$249.95 -
On Sale
HK MP5K, SP89, SP5K Handguard - KeyMod
HKP HK Parts
Now: $71.95Was: $89.95HK MP5K, SP89 Low Profile Forearm KEYMOD The Key MOD tactical hand guard easily installs on your firearm with minimal effort and locks up solid. No fitting required. Designed from the ground up by roller lock & HK enthusiasts with your shooting needs...HKP-17177Now: $71.95Was: $89.95 -
HK MP5 9mm Grenade Launcher Attachment - 3-Lug
H&K Heckler & Koch
$149.95H&K MP5 9mm Grenade Launcher Attachment - 3-Lug This is a rare part and hard to come by. Perfect for MP5 9mm series. Specifications: 3-Lug Compatible With: HK MP5/MP5K HK SP5/SP5K HK 94HKP-16975$149.95 -
On Sale
HK MP5 Barrel - 9mm - Threaded 1/2x32 with 3 Lug
B&T Brugger & Thomet
Now: $359.95Was: $449.95B&T HK MP5 9mm Barrel - Threaded 1/2x32 - 3-Lug New from B&T Switzerland, this cold hammer-forged (CHF) and nitrided barrel is manufactured to exact HK factory specifications exclusively for MP5 models. B&T, a trusted partner of H&K...HKP-17956Now: $359.95Was: $449.95 -
On Sale
HK MP5SD Brass Catcher - Quick Detach
B&T Brugger & Thomet
Now: $188.95Was: $210.00B&T MP5SD Brass Catcher For Use With B&T Handguard The B&T brass catcher for the MP5SD locks into perfect position when mounted to the matched B&T's HK MP5SD Tri-Rail Handguard. Features a quick disconnect mechanism for easy...HKP-18099Now: $188.95Was: $210.00