H&K Heckler & Koch

New HK German Non-LE/Mil Marked UMP .45 ACP 25 Round Magazine The UMP .45 magazines will fit all UMP factory firearms as well as the USC's that have been converted to accept UMP magazines. Compatible...

HK German Factory 10 Round USC .45 Magazine This is the only magazine that HK offers for HK USC unless you want to upgrade to the USC-UMP style of conversions. Compatible with all HK USC Carbines.

HK USC .45 10 Round Magazine Body. This is the only magazine body that HK offers for the HK USC. Compatible With: HK USC Carbines

US Made HK21 Trunnion By Michael's Machine (MM) These are the finest US-made trunnions available on the market.

HK 21E & HK 23E Recoil Rod All Steel Guide Ring

HK 21E & M13 Feed Mechanism Pawl

New German HK Factory 21E & 23E Recoil Spring

New HK Factory 21 Recoil Spring

New HK23E & HK13E Factory German Firing Pin. Rare as these are no longer made. Perfect spare to have on hand. This will also fit the HK13E and MM23 clones.

HK23E Factory German Extractor Spring Rare and hard to find. This is a new HK German part.

HK23E 70 Degree 20T Locking Piece - German HK New This is hard to find as the HK23E or the parts for the HK23E are no longer in production.

New HK German Front Vertical Battle Grip This vertical grip mounts directly to the front shroud and can be mounted at several angles depending on the shooter's option. This item is no longer...