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, HK417, MR762 Buffer Retainer Spring
USA
Now: $4.95Was: $5.95HK MR556/MR762/416/HK417 Buffer Retainer Spring This item is the spring for the buffer retainer that is held in the rear of the lower receiver. Compatible With: HK MR556 HK 416 HK MR762 HK 417HKP-20036Now: $4.95Was: $5.95 -
HK UMP Folding Stock
HKP HK Parts
$119.95Folding Buttstock - GSG9 New UMP folding stock. This is a required part for the USC-UMP Conversion using the stock block B. Compatible With: UMP9 UMP40 UMP45 HK USC-UMP conversions Can also be used on B&T firearm and stock applications for a 1"...HKP-19910$119.95 -
HK MP5, HK90 Series Buttstock Push Pin - Sling Hook - Ambi
H&K Heckler & Koch
$43.95H&K Ambidextrous Stock Sling Pin - Large The ambidextrous sling hook push pin replaces the stock push pin on the rear stock of the HK firearm, to enable the use of an HK sling for both left and right hand use. This part will replace and work on any...HKP-00078$43.95 -
On Sale
HK USPC Flashlight Mount - Adapter
GG&G
Now: $58.95Was: $69.95GG&G HK USPC Pistol Flashlight Adapter With a large number of flashlights and lasers that fit on a Picatinny or MIL-STD-1913 rail, GG&G has designed and manufactured an HK USP compact flashlight mounting rail adapter meeting the Picatinny Rail...HKP-01106Now: $58.95Was: $69.95 -
Out Of Stock
HK416, MR556 ARC-Fire Trigger - 3-Position - Ambi Controls
AS Designs
$297.95HK416, MR556 3-Position ARC-Fire Trigger with Ambidextrous Controls AS Designs' ARC-Fire (Active Reset Clutch) trigger is an innovative take on forced reset triggers. The trigger is reset immediately after each shot, resulting in rapid follow-up...HKP-22429$297.95 -
HK USP Magazine Floorplate - .45 ACP - 12 Round - Extended
H&K Heckler & Koch
$10.50HK USP 45 12 Round Magazine Floor Plate - Extended A great spare to have on hand as these are prone to breakage if mags are dropped on hard surfaces. Compatible With: All HK USP 45 full size & USP 45 Tactical 12 round magazines.HKP-00920$10.50 -
On Sale
SL8, G36 Bolt Hold Open Lever - Extended - HKP
USA
Now: $50.95Was: $59.95SL8 & G36 Extended Bolt Hold Open Lever New SL8, G36, HK243 bolt hold open lever. A must have upgrade for your HK SL8, Sl8-G36 conversion or G36 firearm. The bolt hold open lever is a drop in replacement and requires zero gunsmithing or alterations...HKP-18775Now: $50.95Was: $59.95 -
HK MP5, HK90 Series Selector Lever - Ambi - Right Side
H&K Heckler & Koch
$89.95Heckler and Koch Ambidextrous Selector Lever - Right Side This is the right-side selector of the ambidextrous trigger packs. This part will only work on ambidextrous style or pictogram style housing and trigger packs. New HK German manufactured...HKP-00127$89.95 -
On Sale
HK VP9SK Tactical Barrel - 9mm - Threaded 1/2x28
RCM
Now: $201.95Was: $225.00RCM HK VP9SK 9mm Tactical Barrel - Threaded 1/2x28 Each VP9SK Tactical barrel is machined from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for the HK VP9SK 9mm...HKP-19258Now: $201.95Was: $225.00 -
Out Of Stock
HK USPC Pistol Light, Laser Adapter - Mount - Gen 2
USA
$27.95USP Compact Pistol Laser & Light Adapter This is the adapter needed for all HK USP Compact pistols to attach an aftermarket light or laser to the bottom rail of the firearm since HK USP's use a proprietary rail system. Made from hard coat anodized...HKP-00959$27.95 -
HK416, MR556 Handguard - 11" - Extended - Quad Rail
H&K Heckler & Koch
$445.95HK MR556/416 Extended 11" Quad Rail This drop-in unit offers two full inches in extra length, not the standard 9" rail that comes with the HK 416/MR556, but an extended 11" rail that allows for a longer sight radius and more rail space...HKP-01960$445.95 -
On Sale
HK33, HK53, HK93 Cocking Handle - Extended
HKP HK Parts
Now: $55.95Was: $69.95HKP HK 93, 53, & 33 (5.56/.223) Extended Cocking Handle Extended cocking handle for the HK93/33/53 family of firearms. Each handle is designed with the looks of the HK21E/HK23E style extended cocking handle. All steel handles with an enhanced...HKP-00196Now: $55.95Was: $69.95