HK91 / G3 / HK51 Receivers / Uppers

G3 Magazine Catch High-quality HK German production units are brand-new. These also have the proper newer style cut in them and round shafts. Compatible With: HK G3 HK91 PTR91

H&K 90 Series Barrel Retaining Pin - 5.015mm Each barrel pin is used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel.  Compatible With:  HK MP5, SP5, MP5K,...

G3 Magazine Catch - HK 91, G3, PTR91 -.308/7.62 - USED The highest quality magazine catch available. High quality HK German production units are slightly used HK Parts from Heckler & Koch Germany. These also have the proper cut in them and do not...

HKP V51 Backplate HK Parts brings you a long lost part that was no longer available till now. The Vector Arms V51 firearms was one of the most aclaimed PDW of its time but replacement parts have become difficult to source. We now take like new G3...

H&K G3 Complete Parkerized Rear Receiver Section w/ Rear Sight - SURPLUS UNIT QUALITY MAY VARY - SEE PHOTOS FOR EXAMPLE OF CONDITION RANGE Genuine H&K parkerized steel rear receiver section with fully installed G3 rear sight assembly, two stock...

Flat Bending Jig Set For All HK Style Receiver Flats - RENTAL Receiver flat bending jig RENTAL for all HK receiver flats.  Our rental jigs are crafted in the US from billeted steel and include the latest revisions with proper dowel spacing for the...

H&K MP5, G3, PTR, HK93 Push Button for Magazine Catch - Used   Factory original HK push button replacement part. Limited quantity available.   This is a used part, sold AS-IS, and is not eligible for return.  Compatible...

G3 - Early Production CETME, G3 HK91 Backplate - Used  

Heckler and Koch Trunnion for HK91, G3 - New Old Stock Original Heckler and Koch trunnion for HK91 and G3 rifles. This is a new old stock, original-production component from older HK manufacturing runs and has not been previously installed. Ideal for...

Heckler and Koch Magazine Release Set (Left to Right) for HK91 and G3 HK-manufactured, used magazine release set for HK .308 pattern rifles. Complete left-to-right mag catch assembly with both push-button and paddle controls. Expect finish wear and...

H&K G3 Complete Parkerized Rear Receiver Section without Rear Sight - SURPLUS UNIT CONDITION WILL VARY  Steel rear receiver section manufactured by FMP on HK tooling. Does not include the rear sight.  Compatible with: HK G3, HK91 In-spec...

HK G3 - FMP Early Type Demilled Front End Early style G3 front end with no hanger. These are the perfect option for those doing custom builds. Good condition over all. Includes: Cocking tube Complete cocking handle assembly Trunnion Barrel pin