HK Rifle / SMG Parts
Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!
Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.
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On Sale
HK MR762 A4 Gas Vent Screw - 1.7mm
H&K Heckler & Koch
Now: $26.95Was: $29.95H&K MR762 A4 1.7mm Gas Vent Screw German 1.7mm gas vent screw for MR762 A4. Provides more venting than the factory-installed 1.3mm screw. Compatible With: MR762 A4Now: $26.95Was: $29.95 -
On Sale
HK MR556 A4 Complete Upper - F/A & Ejection Door
H&K Heckler & Koch
Now: $761.36Was: $845.95H&K HK MR556 A4 Complete Upper w F/A Ejection Door The H&K MR556 A4 Complete Upper is a superior factory assembly that comes fully equipped with a forward assist and an ejection port door, providing unparalleled reliability and precision. This...Now: $761.36Was: $845.95 -
On Sale
HK G3/91 (7.62x51/.308) 15 Round Steel Magazine - Refinished
H&K Heckler & Koch
Now: $76.45Was: $84.95HK G3/91 (7.62x51/.308) 15 Round Steel Magazine - Refinished HK G3 factory steel 15-round magazine, expertly restored to its former glory. This magazine has been meticulously refinished inside and out, featuring a polished follower along with a fully...Now: $76.45Was: $84.95 -
On Sale
HK416, MR556 Barrel - 5.56 - 9" - Threaded 1/2"x28 - PDW - A1 and A3
Nefarious Arms
Now: $535.46Was: $594.95Nefarious Arms HK 416C 9" Barrel The Nefarious Arms HK416/MR556 Barrel is built for shooters who demand precision, durability, and consistent performance. Made in the USA from 4150 chromoly steel, cold-hammer-forged, and chrome-lined for enduring...Now: $535.46Was: $594.95 -
On Sale
HK MP5K .40/10mm Folding Stock with Adapter
HKP HK Parts
Now: $191.96Was: $239.95HKP HK MP5K .40/10mm Folding Stock with Adapter Genuine H&K UMP folding stock completely assembled with the HK Parts stock adapter. CNC machined aircraft grade aluminum with QD sling attachment point. Available exclusively at HK Parts. Compatible...Now: $191.96Was: $239.95 -
On Sale
HK416, MR556 Complete Buffer Tube
H&K Heckler & Koch
Now: $159.25Was: $176.95H&K HK416, MR556 Complete Receiver Extension/Buffer Tube Genuine German complete receiver extension for the 416 based 5.56 / .223 platforms. Compatible With: HK416 MR556Now: $159.25Was: $176.95 -
On Sale
HK MP5K Carrier Weldment Tube
USA
Now: $14.96Was: $44.95HK MP5K Carrier Weldment Tube The MP5K carrier weldment tube houses and supports the carrier assembly in the HK MP5K firearm. Each tube ships raw/unfinished and is ready to weld into your build. Compatible With: HK MP5K THIS CLOSEOUT PART IS NOT...Now: $14.96Was: $44.95 -
On Sale
HK21E, HK23E Compression Springs - Inner Buffer, Outer Buffer
H&K Heckler & Koch
Now: $53.96Was: $59.95H&K HK21E/23E Inner & Outer Buffer Compression Springs An unissued set of inner and outer buffer compression springs for your HK21E/23E buffer, sourced directly from HK Germany. Most HK21E/23E buffers in the U.S are first-generation, which use...Now: $53.96Was: $59.95 -
On Sale
HK33, HK53, HK93 Unfinished Polymer Trigger Piece - USED
USA
Now: $11.21Was: $79.95HK 93/53/33 Unfinished Polymer Trigger Piece - USED This unfinished trigger piece is compatible with HK 90 series firearms. Ideal for those looking to complete or customize their build. Compatible With: HK 93/53/33 THIS CLOSEOUT PART IS NOT ELIGIBLE...Now: $11.21Was: $79.95 -
On Sale
HK MP5K Stock or Brace Adapter - 10mm / .40 S&W - Picatinny Rail
HKP HK Parts
Now: $103.96Was: $129.95HKP HK MP5K .40/10 Picatinny Rail Brace/Stock Adapter Open your MP5K up to a vast range of brace and stock options with our Picatinny rail stock adapter. Designed specifically for the MP5K 40 cal and 10mm platforms. Available exclusively at...Now: $103.96Was: $129.95 -
On Sale
HK MP5F Bolt Group - Complete - BLEMISHED
H&K Heckler & Koch
Now: $1,421.96Was: $4,399.95H&K MP5 F Bolt Group Complete - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The bolt head, bolt carrier, and all F/A-related parts...Now: $1,421.96Was: $4,399.95 -
On Sale
HK G36 Helmet Stock
B&T Brugger & Thomet
Now: $252.00Was: $280.00B&T HK G36 Helmet Stock The B&T G36 helmet stock was designed to clearance the operator's helmet when viewing the target through the rifle's sights. This military derived design is precision made in Switzerland. Compatible With: HK G36Now: $252.00Was: $280.00