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 MP5 Replacement Buffer - Folding Stock or End Cap
HKP HK Parts
$3.49HKP MP5 Replacement Buffer for Folding Stock or End Cap Spare replacement buffer for choate folding stocks or end caps. Compatible With: Choate MP5 and MP5K Stocks or End Caps (NOT compatible with MP5 .22 LR)HKP-18735-M$3.49 -
HK MP5, SP5 Stabilizing Pistol Brace
SB Tactical
$265.95SB Tactical HK MP5, HK SP5 Retractable Pistol Stabilizing Brace - Black The HK MP5 and HK SP5 pistol stabilizing brace is 3-position fully adjustable pistol brace and is comprised of a billeted 6061 alloy hard-coat anodized aluminum adapter, steel...HKP-19161$265.95 -
HK VP9, VP9L Optic Plate Screw - Red Dot Mount Screw
HKP HK Parts
$1.95Replacement Screw For VP9, VP9L Optics Plate & Optics Filler Cover Torx head plus T20 steel replacement screw for any HK German or USA made VP9 optics ready slide filler plate or optics plate. **Each screw is sold separately/individually. Please...HKP-19709$1.95 -
Out Of Stock
HK USP Magazine - .45 ACP - 12 Round - Extended Floorplate - Red Follower
H&K Heckler & Koch
$54.95HK German Production USP .45 - 12 Round Magazine - Red Follower Compatible With: HK USP .45 Full-Size Pistols HK USP 45 Tactical USP Expert, USP Elite Please Note: This will not fit the HK Mark 23 without swapping the floorplate to the Mark 23...HKP-21418$54.95 -
HK Roller Retainer Pin - New Style
H&K Heckler & Koch
$6.95HK Roller Retainer Pin, Clamping Sleeve- New Style This part works with all roller retainer plates and springs. HK started this change of roller retainer pins starting in all 2011-produced bolt heads. Works with all styles of roller retainer plates...HKP-01954$6.95 -
HK VP9, VP40 Magwell - Low Profile - Tactical
HKP HK Parts
$44.95 - $59.95HKP HK VP9/VP40 Tactical Low Profile Magwell Low Profile, every day carry magwell for the HK VP9/VP40 pistol. The low profile mag-well is designed for the average every day VP owner. Whom would like the enhancements and competitive advantage a magwell...HKP-17802-M$44.95 - $59.95 -
HK90 Series Ejector Lever Axle - US
HKP HK Parts
$9.95US Ejector Lever Axle This US ejector lever axle pin holds the ejector lever in place in the trigger pack. Made out to HK spec for the best US replacement part on the market. The best replacement for your worn out or broken axle. A must have replacement...HKP-20630$9.95 -
HK MP5 Pistol Stabilizing Brace - .22LR
SB Tactical
$149.95SB Tactical - HK MP5 .22LR Pistol Stabilizing Brace The SBT5-22 Pistol Stabilizing Brace® enhances your HK MP5 .22LR with an integral, side-folding polymer endplate. The SBT5-22 gives you all of the advantages of a pistol with improved control by...HKP-21226$149.95 -
HK MP5 .22LR Match Trigger Upgrade Spring Kit
HKP HK Parts
$17.49H&K MP5 .22 Match Trigger Spring Kit - Set of 3 Enhanced Springs The HK Parts Match drop-in spring upgrade set will enhance your MP5-22's trigger pull to an even smooth, crisp, and lighter pull that will promote better control, which in turn promotes...HKP-17335$17.49 -
HK MP5 Magazine - 9mm - 30 Round
AC-Unity
$22.95AC-Unity 30 Round HK MP5 9mm Magazine CLICK ON THE "Bulk Pricing" LINK ABOVE (UNDER THE SKU NUMBER) FOR OUR BULK PRICING SCHEDULE The AC-Unity 30 round MP5 magazine is a lightweight, impact resistant and reliable magazine for all 9mm HK MP5, SP5,...HKP-20155$22.95 -
HK MP5, SP5 Stock - A2 Fixed
Michaels Machines
$179.95HK MP5, SP5 Stock - A2 Fixed - US Made Each stock counts as one US-made compliant part. Perfect for that build where you US-made component is required for compliance. This is the finest US-made MP5 stock as it includes a rubberized backplate to mitigate...HKP-02314$179.95 -
HK MP5 Handguard - MLOK
MI Midwest Industries
$124.95MI MP5 M-LOK Forearm Compatible professional grade one piece design Simple installation, include all tools Mil-spec top rail. Features 15 full and 5 half M-LOK slots. Features two anti-rotation QD sling swivel sockets. Constructed of 6061 aluminum, hard...HKP-18472$124.95