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, G36, SL8 Gas Piston
Nefarious Arms
Now: $62.95Was: $74.95Nefarious Arms Gas Piston for HK G36, HK SL8, HK416 and HK MR556 A great spare, upgrade, or replacement part for your HK. Includes 3 piston rings for a complete drop in replacement part. TiN coated for corrosion resistance. Compatible...HKP-21364Now: $62.95Was: $74.95 -
On Sale
HK MP5K Folding Brace - Skeletonized
B&T Brugger & Thomet / SB Tactical
Now: $191.95Was: $239.95SB Tactical - B&T - HK MP5K Swiss Folding Brace - Skeletonized Factory Swiss B&T MP5K, SP5K folding pistol brace with the SB tactical/ B&T components assembled. A rare offering using the B&T Swiss manufactured folding polymer end cap with...HKP-21054Now: $191.95Was: $239.95 -
HK45 Thread Protector - .578x28 RH
HKP HK Parts
$19.95HKP HK45 .45 ACP Thread Protector - Threaded .578x28 RH U.S.-made titanium thread protector designed for .45 ACP barrels threaded .578x28 right-hand. Features a fully hooded profile that extends over the muzzle to protect exposed threads and the barrel...HKP-19514$19.95 -
HK45C, HK45CT Barrel - .45 ACP - 4.5" - Threaded 16x1 LH
H&K Heckler & Koch
$339.95Heckler and Koch HK45 Compact Tactical Barrel - Threaded 16x1 LH New HK German HK45C threaded tactical barrel. A drop in barrel for the HK45 compact firearm. Features: Heckler and Koch Genuine Part Threaded For Use With Suppressors Threaded 16x1 LH Cold...HKP-01036$339.95 -
Out Of Stock
HK P2000 Tactical Barrel - 9mm - 4.28" - Threaded 1/2x28 RH
RCM
$225.00RCM HK P2000 9mm Tactical Barrel - Threaded 1/2x28 RH Each P2000 tactical barrel is crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. It is the finest threaded replacement barrel for the HK P2000 9mm...HKP-16700$225.00 -
Out Of Stock
HK416, MR556 Piston Guide - Threaded - Upper Receiver
H&K Heckler & Koch
$19.95Heckler and Koch Upper Receiver Threaded Piston Guide for HK MR556 and HK416 Compatible With: HK416, MR556 M27HKP-02640$19.95 -
HK91, G3 Bolt Group, Complete - Full Auto - Used
H&K Heckler & Koch
$259.95Heckler and Koch Factory German Full Auto Bolt Group - Complete Used for HK G3, HK91, and PTR Everything you need as a spare or a direct replacement of your existing bolt group. This bolt group is a direct replacement of all HK G3, HK91, SAR3/8, PTR-91,...HKP-00356$259.95 -
Out Of Stock
HK MP5, HK33, G3 Optic Mount - Mid Range
B&T Brugger & Thomet
$129.95B&T MP5, HK33, G3, PTR - Mid Range Mount This scope mount will allow the the use of the HK fixed sights (through an oval opening) and also allowing the optic to sit higher thant the front sight tower for an unobstructed view. This will allow the use...HKP-16882$129.95 -
Out Of Stock
HK21, HK11 Trunnion
RCM
$274.95RCM HK21 Trunnion When RCM set out to make a replacement trunnion for the venerable HK21, they started the process by putting a factory unit through rigorous destructive metal testing. The end-product: a US-made trunnion blending the proper...HKP-21609$274.95 -
On Sale
HK VP9, P30 Magazine - 30 Round - 9mm
HKP HK Parts
MSRP: $119.99Now: $95.95Was: $119.9930 Round Magazine Complete - 9mm - HK PARTS - HK VP9, HK P30 Drop-in magazine ready to go! HK Parts takes an existing 15 round magazine and a +15 magazine extension to assemble them into a working 30 round magazine. Not only will you be adding double the...HKP-21304MSRP: $119.99Now: $95.95Was: $119.99 -
On Sale
HK P30L Tactical Barrel - 9mm - 5.06" - Threaded 1/2x28 RH
RCM
Now: $201.95Was: $225.00RCM HK P30L 9mm Tactical Barrel - Threaded 1/2x28 RH Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for the HK P30L 9mm pistol...HKP-20496Now: $201.95Was: $225.00 -
Out Of Stock
HK P7M8, P7M10, P7M13 Night Sights
Meprolight
$109.95Meprolight P7M8, P7M13, & P7M10 Night Sight Front & Rear Set Features: Unequaled Light Performance Brightest Night Sights Available Today Used by Military & Law Enforcement All Tru-Dot sights are covered by a 12-year usable illumination...HKP-01905$109.95