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 Mark 23 Magazine Spring - 12 Round
H&K Heckler & Koch
$8.95HK German Mark 23 Magazine Spring - 12 Round A must have repair and replacement spring for your HK Mark 23 Socom Mags. Compatible With: HK Mark 23 12 round magazines &nbsHKP-01427$8.95 -
On Sale
HK UMP, USC, USP, HK45 Flash Hider - 4 Prong - Threaded .578x28 RH
HKP HK Parts
Now: $35.96Was: $74.95HK Parts .45 ACP 4 Prong Pistol Flash Hider - Threaded .578x28 RH This flash hider adds a neat look & feel that provides outstanding flash hiding capabilities. Perfect for adding a unique look to...HKP-02188Now: $35.96Was: $74.95 -
On Sale
Dummy Rounds - .45 ACP - Set of 5
Strike Industries
Now: $8.06Was: $8.95Set of 5 .45 ACP Dummy Rounds Strike Industries dummy rounds will let you safely test the feeding, extraction, and magazine function of your firearms without the worry of accidental discharge. They...HKP-17384Now: $8.06Was: $8.95 -
HK UMP Magazine Locking Plate - .45 ACP
H&K Heckler & Koch
$9.95H&K UMP (.45 ACP) Magazine Locking PlateHKP-16338$9.95 -
On Sale
HK91, G3 Tactical Handguard
PTR
Now: $134.96Was: $149.95New 2nd Generation- HK Black Matte Finish PTR, HK91, G3 Forearm Made from aircraft-grade aluminum, rock-solid, and lightweight. This forearm allows you to add up to 3 rails on your firearm. That...HKP-00368Now: $134.96Was: $149.95 -
HK33, HK91, G3 Complete Triple Frame Front Sight Tower
H&K Heckler & Koch
$29.95NEW HK German Front Sight Tower Triple Frame G3 triple frame in. Comes complete with sight blade and roll pin. Compatible With: HK G3 HK G3KHKP-18777$29.95 -
On Sale
HK MP5, MP5K, HK93, HK91 Handguard Retainer Screw - Tactical, Keymod, and M-LOK
PTR
Now: $3.97Was: $4.95PTR Tactical, Keymod & M-LOK, Retainer Handguard Screw This is the screw that is used on all the Tactical, Keymod, and M-LOK forearms (MP5K, MP5, HK93, HK91). A great spare to have in case the...HKP-16743Now: $3.97Was: $4.95 -
HK MP5 Parts Kit - 10mm - Pistol
HKP HK Parts
$1,879.95HKP HK Parts HK MP5 Parts Kit - 10mm - Pistol With Flat, Top Rail, and Weldment Set - 10mm HK Parts MP5 Build Kit is the best priced value available anywhere. There is a limited supply and they will...HKP-18409$1,879.95 -
HK416, MR556 Buffer Tube - Enhanced
H&K Heckler & Koch
$199.95FDE HK 416, MR556 OTB (over the beach) Buffer Tube, Receiver Extension - Commercial Genuine HK German manufactured 416 & MR556 latest generation, marine environment & over the beach buffer tube...HKP-18499$199.95 -
On Sale
HK MP5, MP5K Faux Suppressor - KAC Style - 1/2x28
MFI
Now: $111.16Was: $138.95MFI HK MP5K, SP5K KAC-Navy Faux Suppressor - 1/2x28 The MFI faux KAC-Navy suppressor is designed to thread onto any 1/2x28 barrels and fully enclose the 3-lugs, ensuring an authentic-looking fit and...HKP-22364Now: $111.16Was: $138.95 -
On Sale
HK MP5 Locking Piece - 100 Degree - Sold As Is - Gunsmith Special
USA
Now: $7.46Was: $33.95HK MP5 100 Degree Locking Piece - Sold As Is - Gunsmith Special This US-made MP5 100 degree locking piece is the correct locking piece for all HK MP5-style forearms. This locking piece has also now...HKP-99117Now: $7.46Was: $33.95 -
On Sale
HK45 Railok™ Threaded Barrel Compensator
HKP HK Parts
Now: $101.21Was: $189.95HK Parts Railok™ Mounting System Threaded Barrel Compensator: H&K HK45 The HK Parts Railok™ mounting system compensator strikes a seamless balance of form and function. Users will immediately notice...HKP-21440Now: $101.21Was: $189.95