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 Handguard - SL - .22LR
Magpul
$99.95Magpul HK MP5 .22LR SL Handguard This forearm has been CNC machined to fit the HK MP5 .22 model specifically. The factory unit will not fit. HK parts took the time and made the modification possible using a CNC machine that was dedicated to removing...HKP-20480$99.95 -
HK MP5K, SP89 Bolt Carrier - Full Auto - 9mm - USA
RCM
$149.95MP5K Full Auto Bolt Carrier - US- Made - RCM This part is machined from billet ordnance steel. Our US-made MP5K carrier is made to the most updated and latest MP5K F specs. Tungsten filled, heat treated, and factory fresh production. Providing the finest...HKP-01190$149.95 -
HK MP5, HK94, SP5K Rear Sight Drum and Base - US
HKP HK Parts
$53.47HKP MP5, HK94 & SP5K Rear Sight Drum & Base Finally an affordable factory correct rear sight that does not break the bank or lead to settling for inferior 3rd world produced pot metal cast MP5 rear sights. We offer the only set that includes an...HKP-17512$53.47 -
HK Mark 23 Picatinny Rail Adapter - Gen 2
HKP HK Parts
$99.95HK Mark 23 Picatinny Rail Adapter (SOCOM) - Gen 2 The original Mark 23 rail adapter mount provides for a seamless attachment point of any tactical light, laser setup that attaches by way of a Picatinny rail. These units have been tested in the harshest...HKP-01470$99.95 -
HK UMP 45, SMG 45 Magazine Loader
HKP HK Parts
$39.95HKP HK UMP 45, SMG 45 Magazine Loader The enhanced loader is the finest loader available for UMP 45 magazines. Speed up your load time and save your thumb in the process. Made in the USA. Compatible With: H&K UMP & USC 45 magazines LWRC SMG 45...HKP-19662$39.95 -
HK MP5 A3 Retractable Stock Buffer
HKP HK Parts
$6.74MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable Stocks The A3 stock buffer is a high wear and common replacement items that does need to be replaced when they become torn, cracked, brittle, discolored & worn. These units are made from...HKP-18160$6.74 -
HKP Range Bag - Large
HKP HK Parts
$34.95HK Parts Range Bag - Large Get your hands on our new premium range bags. Main cover has loop fastener panel for hook and loop patches and name tape and a top hook and loop fastener loop for securing hearing protection for easy access when at the shooting...HKP-20741$34.95 -
HK MP5 Extractor Spring - .40 S&W / 10mm, .357 SIG
USA
$9.95HK MP5 40/10 & .357 - Extractor Spring The extractor spring is the most common wear item on an MP5 and a must-have spare and replacement part. HK Germany no longer makes the MP5 40/10 extractor spring, and they are no longer available. Our offering...HKP-00409$9.95 -
HK MP5 Fixed Stock
AC-Unity
$69.95AC-Unity HK MP5 Fixed Buttstock - Gen 2 with Removable Butt Pads The AC-Unity HK MP5 fixed buttstock delivers superior performance and comfort. Featuring soft, shock-absorbing rubber recoil pads, it effectively replaces the outdated fixed but-pad,...HKP-21640$69.95 -
HKP +4 HK 45C, USPC .45 ACP Magazine Extension
HKP HK Parts
$49.95 - $54.95HKP +4 HK 45C, USPC .45 ACP Magazine Extension HK Parts magazine extension +4 adds 4 additional rounds to the HK45C, 8 round magazine. Each unit can then be fully assembled into a 12 round HK45C magazine. Ideal for competitive shooters, concealed carry,...HKP-18654-M$49.95 - $54.95 -
HKP HK MP5 .22LR Handguard - M-LOK
HKP HK Parts
$169.95HKP/H&K MP5 .22LR Forearm - M-LOK HK Parts brings you a long over due option for all the MP5 .22LR owners. Our new forearm takes the classic MP5 plastic forearm aesthetics from the MP5 .22LR and combine it with M-LOK compatible features for all sorts...HKP-21260-M$169.95 -
HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - Bundesadler
H&K Heckler & Koch
$93.00Heckler and Koch 30 Round HK MP5 Bundesadler Magazine The Bundesadler laser-etched into a factory German H&K magazine. Heckler and Koch German magazine 9mm 30 round curved all steel magazine. German HK MP5, MP5K mags are the finest HK...HKP-20914$93.00