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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Out Of Stock
GSG-522, GSG-16 Drum Magazine - 50 Round - Translucent
HKP HK Parts
$79.95HKP 50 Round GSG-522/GSG-16 Drum Magazine - Translucent Compatible With: GSG-16 GSG5 GSG5PK GSG522 GSG5-SD ** Please note: This magazine will NOT FIT the HK Walther/Umarex MP5-A5 or SD models (we have one that works for the HK MP5 .22 in the MP5 .22...HKP-16234$79.95 -
Out Of Stock
HK416, MR556, HK417, MR762 Bolt Catch Spring
H&K Heckler & Koch
$6.95Heckler and Koch HK MR556/762/416/417 Bolt Catch Spring Compatible With: HK MR556 HK 416 HK MR762 HK 417HKP-16661$6.95 -
HK G36C, G36K Gas Piston
H&K Heckler & Koch
$99.95HK German G36C & G36K Gas Piston - Complete New HK German factory G36C and G36K gas piston complete with sealing rings installed. A great spare or replacement part. This is also a popular part for those upgrading to an SL8 to G36K or C barrel length...HKP-00352$99.95 -
HK91, G3, PTR Magazine - 10 Round - Steel
H&K Heckler & Koch
$73.9510 Round Magazine - Steel This part counts as 1 US-made part for 922r compliance for HK rifles. This magazine was made by Heckler and Koch and converted to ten rounds in the United States using the US-made floorplate. Compatible With: HK91 HK G3 HK...HKP-01607$73.95 -
On Sale
Folding Grip - Quick Detach - Low Profile
UTG
Now: $45.95Was: $54.95UTG Quick Detach Low Profile Folding Grip Features: Unique knurled surface for the most solid grip Smart Posi-Lock cross bolt and spring tensioned locking plate with steel insert for the most secure installation Fully adjustable quick detachable...HKP-15029Now: $45.95Was: $54.95 -
On Sale
HK MP5, SP5 Handguard - SD Style Conversion
HKP HK Parts
Now: $199.95Was: $279.95HK Parts Handguard Conversion HK MP5SD Convert your standard MP5 to the iconic SD-style look with this HKP MP5SD handguard conversion. Designed for aesthetics only, this drop-in handguard gives your MP5 the suppressed MP5SD appearance without requiring...HKP-22091Now: $199.95Was: $279.95 -
On Sale
HK MP5 Brace and HKP Adapter - Skeletonized
HKP HK Parts / SB Tactical
Now: $239.95Was: $299.95SB Tactical Side Folding Brace For The HK MP5, SP5 model Each brace comes assembled ready to install no assembly required. This complete brace will come assembled with our own HK Parts stock adapter. CNC machined aircraft grade aluminum with QD sling...HKP-21055Now: $239.95Was: $299.95 -
On Sale
HK VP9L Barrel - 9mm - 5.6" - Threaded 13.5x1 LH
RCM
Now: $222.95Was: $262.50RCM HK VP9L 9mm Tactical Barrel - Threaded 13.5x1 LH 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 VP9L 9mm...HKP-19202Now: $222.95Was: $262.50 -
HK VP9, VP9SK, VP40 Firing Pin Spring
H&K Heckler & Koch
$9.95H&K HK VP9/VP9SK, VP40 Main Spring For Firing Pin German HK. Compatible With: VP9 VP9 Tactical VP9SK VP40 VP40 TacticalHKP-16829$9.95 -
On Sale
HK45C, USPC Magazine Extension - 12 Round - Red
HKP HK Parts
Now: $67.95Was: $84.95HKP 12 Round HK 45C, HK USPC .45 ACP Magazine - Red HK Parts magazine extension +4 adds 4 additional rounds to the HK45C, 8 round magazine. Each unit is then fully assembled as a 12 round HK45C magazine. Ideal for competitive shooters, concealed carry or...HKP-18673Now: $67.95Was: $84.95 -
Out Of Stock
HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - LEO Marked - Like New
H&K Heckler & Koch
$199.95HK German MP5 30 Round Magazine Laser Etched LEO Markings This is a Like New H&K German MP5 9mm 30-round magazine in excellent condition. All MP5 magazines are police department trade-in items featuring laser-etched LEO/Restricted markings. These...HKP-20517$199.95 -
HK416, MR556, HK417, MR762 Clamping Sleeve
H&K Heckler & Koch
$5.95H&K HK 416/417/MR556/MR762 Clamping Sleeve Compatible With: HK416 HK417 MR556 MR762HKP-16618$5.95