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 Stock or Brace Adapter - .22LR
HKP HK Parts
$99.95HKP - HK MP5 .22LR Brace/Stock Adapter Expertly crafted from a solid billet of CNC machined aircraft grade aluminum with QD sling attachment points. Buffered with factory correct “H” buffers to...HKP-21543$99.95 -
HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A3
Nefarious Arms
$594.95Nefarious Arms HK 416/MR556 10.4" A3 Barrel ***THE BARREL EXTENSION RIM IS MARKED "HAUS" DUE TO AN ERROR BY THE BARREL EXTENSION SUPPLIER. THE MARKING IS NOT VISIBLE ONCE INSTALLED. THESE BARRELS...HKP-21335$594.95 -
HK93 Trunnion
RCM
$65.00RCM HK93 Trunnion Made to exact factory HK specifications for the HK93, HK33 type builds. These are the best trunnions of their kind on the market. Machined to HK spec making the install painless...HKP-20807$65.00 -
Out Of Stock
HK VP40 Barrel - .40 S&W - 4.45" - Threaded 14.5x1 LH
RCM
$225.00RCM HK VP40 .40 S&W Tactical Barrel - Threaded 14.5x1 LH Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest...HKP-17369$225.00 -
Out Of Stock
HK MP7 Retractable Buttstock - 3-Position
H&K Heckler & Koch
$199.95H&K HK MP7 3-Position Retractable Stock New German HK Rare HK MP7 - 3 Position Retractable ButtstockCompatible with all MP7A1 and MP7A2 FirearmsHKP-18283$199.95 -
HK MP5 Locking Roller +4 - .40 S&W
HKP HK Parts
$11.95HK US MP540 Undersized Locking Roller, +4 The proper roller size is essential for proper headspacing of bolt gap. Please Note: The price listed is per roller. Order 2 (pair) for a compleHKP-17562$11.95 -
On Sale
HK USPC HD Night Sight - Yellow, Green
Trijicon
Now: $143.10Was: $159.00Trijicon HK USPC HD Night Sight - Yellow/Green The three-dot green tritium night sight set front sight features a taller blade and an aiming point ringed in photoluminescent paint, while the rear...HKP-14544Now: $143.10Was: $159.00 -
HK UMP, USC Sight Support Roll Pin - Rear
H&K Heckler & Koch
$9.95HK UMP & USC Rear Sight Support Roll Pin This is the axle pin that holds the rear sight assembly to the rear sight housing of the receiver on the USC or UMP firearm.HKP-02155$9.95 -
HK33, HK53, HK93 Stock or Brace Adapter - AR-15 Style
HKP HK Parts
$199.95HKP HK 93/53/33 (5.56/.223) AR-15 Style Brace/Stock Adapter PTR Manufactured AR15 to HK 93,33,53 series stock adopter assembly. Each adopter unit will allow the use of AR15 stocks on your HK...HKP-16255$199.95 -
On Sale
HK MP5, MKE AP5 Trigger Housing - 9mm - Contoured - ETS
MKE
$56.00 - $116.96MKE AP5, HK MP5 ETS-Style Contoured Trigger Housing This contoured trigger housing is manufactured by MKE for MP5 and AP5 pattern firearms and features an ETS selector configuration. Designed for...HKP-22496-M$56.00 - $116.96 -
On Sale
HK VP9, P30 Magazine Base Pad - Hard Duty
Grayguns
Now: $19.80Was: $22.00The Grayguns HK VP9 and P30 Magazine Base Pads are designed for hard-duty use. The base pads are manufactured from 6061 Aluminum and professionally finished with MIL-A-8625 Type III anodized coating...HKP-22344Now: $19.80Was: $22.00 -
On Sale
HKP Bench Mat - Bundesadler
HKP HK Parts
Now: $19.96Was: $24.95HKP Bench Mat - Bundesadler The HK Parts bench mat is the perfect cleaning & repair mat designed specifically for your Heckler & Koch. The soft top protects your gun from scratches while the rubber...HKP-21845Now: $19.96Was: $24.95