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 P30L Lightcomp™
HKP HK Parts
$387.95HKP P30L Lightcomp™ (Patent Pending) Traditionally, adding a compensator and a weapon light to your pistol would require purchasing the light and the comp. In a perfect world, that combo would optimally locate the weapon light switches for...HKP-21427$387.95 -
Out Of Stock
HK UMP Barrel - .45 ACP - 7.87" - Threaded .578x28
HDPS
$349.95HK UMP .45 ACP Barrel - Threaded .578x28 HDPS UMP barrels are perfect for the USC to UMP conversions and for a replacement UMP .45 ACP barrel. They are considered by many to be the finest US-made barrel available. This barrel is the same length as a...HKP-20872$349.95 -
HK USP Barrel - 9mm - 4.86" - Threaded 13.5x1 LH - Standard
H&K Heckler & Koch
$320.95H&K USP 9mm Standard Threaded Barrel - Threaded 13.5x1 LH This Heckler & Koch factory threaded barrel is a drop-in replacement for USP 9mm SD models. It can also be used on standard USP 9mm full-size models, but the O-ring should be removed for...HKP-17809$320.95 -
HK Firearm Cleaning Kit - 7.62x51 / .308
HKP HK Parts / Heckler & Koch
$89.95H&K (7.62x51/.308) Cleaning Kit New Factory HK German 91, G3, PTR, or other HK .308 cleaning kit for all .308 HK's or clones. Includes: Cleaning rod for short and long barrels Adapter for cleaning tools 8-32 Patch holder Bore brush Chamber...HKP-01549$89.95 -
HK Ambidextrous Sling Pin Locking Knob
H&K Heckler & Koch
$11.95New HK German Ambidextrous Sling Pin Locking Knob These are common replacement items, they can become loose as the O-ring wears and falls off. Be sure to order extra O-rings to avoid losing the locking nut. This is a common replacement part for those...HKP-01042$11.95 -
HK MP5SD Tri- Rail Mount for Suppressor - 9mm
B&T Brugger & Thomet
$158.95B&T MP5SD 9mm Tri- Rail Mount for Suppressor Can accommodate suppressors up to 1.60 inches in overall diameter. Specifications: Color: Black Diameter max: 57.5 mm Length max: 44.5 mm Length of right rail: 30 mm Length of left rail: 30 mm Length of...HKP-16880$158.95 -
B&T Ambidextrous Sling Pin - Small
B&T Brugger & Thomet
$58.95B&T Ambidextrous Sling Pin - Small Replaces the small push pin to allow a sling attachment point on either the left or right side of the firearm. Each measures: 6x29mm with rubber o-ring and net screw.HKP-16886$58.95 -
Out Of Stock
HK MP5, HK416 Barrel - .22LR - 8.5" - Threaded 8x.75
RCM
$229.95RCM HK MP5 / 416 .22LR Pistol Barrel The first and only replacement barrel for the HK .22LR platforms—this is a game-changer! Previously, replacing the barrel meant the hassle of sending the receiver to H&K and waiting for the assembly to be...HKP-21403$229.95 -
On Sale
Glock 19 Magazine Parts Replacement Kit
HKP HK Parts
Now: $7.95Was: $15.95Glock 19 Magazine Parts Replacement Kit Includes: 9 round coil spring Locking plate Floor plate. This replacement kit includes the new style magazine insert. All 3 components are factory Glock parts. Compatible With: Glock 19HKP-20854Now: $7.95Was: $15.95 -
B&T TP9/MP9/KH9/P26 Folding Stock Assembly Complete
B&T Brugger & Thomet
$190.00B&T TP9/MP9/KH9/P26 Folding Stock Assembly Complete Swiss B&T manufactured Tactical Folding Stock Assembly for the TP9, MP9, KH9 & P26. Includes: Main stock assembly (BT-30234) Folding stock axle (BT-30116) Release button (BT-30184) Locking...HKP-17298$190.00 -
HK MP5 1913 End Plate Adapter
MI Midwest Industries
$89.95MI HK MP5 1913 End Plate Adapter The Midwest Industries Picatinny end plate adapter opens up your stock and brace options to a myriad of off-the-shelf possibilities. The adapter installs in the same manner as the factory end cap with a single push pin...HKP-21493$89.95 -
HK MP5K/SP5K SEF Universal Housings - Clipped & Pinned - USED
H&K Heckler & Koch
$99.95H&K MP5K/SP5K SEF Universal Housings - Clipped & Pinned - USED Finally a solution everyone was looking for. A one size fits all approach for the MP5K and SP5K style semi-auto shelf. You can easily swap the lower trigger group assembly and install...HKP-21352$99.95