Ready to give your HK USC 45 the functionality it has always deserved? Gone are the days of heavy factory trigger pulls, ridiculous looking fixed stocks, and lengthy field stripping. This US manufactured lower receiver (18 USC 922R Compliant) is an all in 1 package to give your USC its UMP potential:
AR15 FCG and Grip for Superior Ergonomics
Super Safety Compatible to Allow for Rapid Follow-Up Shots
Single Breakdown Pin for Ease of Field Stripping
Provision for Factory HK UMP Folding Stocks
Included in Order is:
USC 45 AR Lower
SS Lever Trip Bar
Folding Stock Adapter
Folding Stock Install Hardware
Breakdown Pin
Buffer
Super Safety Lever, Cam, and Detent
Lower ships fully assembled and ready to run (no modification upper receiver required).
This lower has been tested with GDI-3D 20 round magazines, factory HK USC magazines and Hera Arms magazines.
Pro-Mag produced feeding issues in forced reset mode.
This conversion kit is NOT compatible with UMP45/40/9 magazines.
