We couldn't ignore the potential of running UMP mags in your USC, so we had to release the double stack version for converting your USC 45 into a UMP 45. This US manufactured lower receiver is an all in 1 package to give your USC its UMP double stack 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:
UMP45 Magazine AR Lower
SS Lever Trip Bar
Folding Stock Adapter
Folding Stock Install Hardware
Breakdown Pin
Buffer
Super Safety Option: Super Safety Lever, Cam, and Detent
Standard Safety Option: Comes with standard AR-15 Safety
This lower has been tested with only genuine HK magazines. We cannot guarantee functionality with aftermarket magazines.
This package serves as (4) 18 USC 922R compliant parts:
Trigger Housing
Trigger
Hammer
Disconnector
This conversion kit is compatible with UMP45/40/9 magazines. Prepare to dump some double stack mags.
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Please Note: Due to state/local regulations, we cannot ship to the following locales: CA, CO, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NV, NY, OR, RI, WA, D.C, PR.
For additional shipping information, please reference the shipping section of our terms and conditions.
The customer is responsible for confirming that the parts purchased are compatible with their firearm prior to purchase. If the customer identifies post purchase that the purchased item is not compatible with their specific firearm then they must submit an RMA to receive a partial refund per our Terms and Conditions. Note: Damaged items will not be eligible for refund.
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