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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Sling Pin O-Ring - Ambi
H&K Heckler & Koch
$1.95H&K Ambidextrous Sling Pin O-Ring HK ambidextrous sling pin replacement O-ring for all ambidextrous sling pins. This item is a common wear/breakage part that does need to be replaced from time to...HKP-01090$1.95 -
M-LOK Cantilever Rail - Light Mount
Magpul
$19.95Magpul Rail Light Mount M-LOK Designed for use with all M-LOK mounting surfaces, the M-LOK polymer cantilever rail/light mount allows the attachment of various MIL-STD-1913 Picatinny spec...HKP-20689$19.95 -
HK91, G3 Magazine Release Set
H&K Heckler & Koch
$34.95Heckler and Koch Magazine Release Set (Left to Right) for HK91, G3 This HK German manufactured magazine release set for HK .308 pattern rifles consists of 4 pieces. Includes: Magazine CatchHKP-00929$34.95
HK416, MR556 Magazine - 20 Round
H&K Heckler & Koch
$74.95Heckler and Koch HK 20 Round HK MR556 and HK416 5.56/.223 Magazine New HK416 and HK MR556 Factory 20 Round Steel Maritime Coated Magazine. Will fit and work in all AR-15/M16 weapons. Perfect for...HKP-00029$74.95
HK91 Polymer To Metal Trigger Group Conversion Kit
HKP HK Parts
$225.95HK 91/PTR 91 Polymer To Metal Trigger Group Conversion Kit. This is everything you will need to convert the lower trigger group on your HK 91 from polymer to metal housing with contoured grip. Just...HKP-17362$225.95
HK UMP, USC Buttstock Axle Pin
H&K Heckler & Koch
$30.95HK German UMP Rear Stock Axle Pin This is the HK factory German stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those that are doing the USC to UMP...HKP-00604$30.95
Grip Cap Spring - HK Navy Style
H&K Heckler & Koch
$4.95H&K Grip Cap Replacement Spring This is the replacement spring that is used on both the US and German made grip caps that can become damaged and broken with use. A great idea to have on hand as the...HKP-16408$4.95
HK UMP, B&T APC Folding Stock
B&T Brugger & Thomet
$140.00B&T Brugger and Thomet Folding Stock for HK UMP and B&T APC Swiss manufactured B&T APC & UMP Folding stock. (NFA rules apply) <HKP-17441-M$140.00Out Of Stock
HK VP9, VP9SK, HK VP40 Disassembly Safety
H&K Heckler & Koch
$14.99Dismounting Or Disassembly Safety HK VP9, VP40 Compatible With: HK VP9 HK VP9A1 FHKP-16792$14.99
HK P7 Series Drop Safety Catch Spring
H&K Heckler & Koch
$9.95HK P7 Drop Safety Catch Spring This is one of the most common wear items on the P7 series of firearms—a must-have spare part and hard to find. Compatible With: PSPHKP-01353$9.95
HK USP Magazine - 9mm - 10 Round
H&K Heckler & Koch
$49.95H&K 10 Round HK USP 9mm Magazine Perfect for those that live in magazine restrictive states or for those that require a 10 round mag capacity. Compatible With:HKP-01239-M$49.95Out Of Stock
HK SP5K Bench Mat
HKP HK Parts
$13.95HK MP5K, SP5K, SP89 Gunsmithing Bench Mat This isn't your ordinary gun cleaning mat. Show your pride for your HK SP5K firearm while using our high quality neoprene rubber backed and cloth topped gun...HKP-18213$13.95