UMP45 FRT Lower Kit

Ready to give your UMP build 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 is an all in 1 package to give your build its full UMP potential:

• Super Safety Compatible to Allow for Rapid Follow-Up Shots
• Single Breakdown Pin for Ease of Field Stripping

Included in Order is:

• UMP 45 AR Lower
• SS Lever Trip Bar
• Super Safety Lever, Cam, and Detent

Got a USC45? We got you covered. Select the stock block kit and we will send you everything needed to get your USC running and looking right. 

Included in the stock block kit is:

• Stock block with installed buffer
• Stock block axle pin
• Stock installation hardware
• Double stack mag cut jig

Lower ships fully assembled and ready to run.

This lower has been tested with factory HK UMP magazines. We cannot guarantee functionality with aftermarket magazines.

Lowers are compatible with factory backing plates and HDPS/HKP stock blocks.

This package serves as (4) 18 USC 922R compliant parts:

• Trigger Housing
• Trigger
• Hammer
• Disconnector

Stock not included.

It is highly recommended that you run a bolt with a firing pin safety. Some low quality bolts lack this feature and could cause out of battery discharges. See guide for more details.

Lead times are 6 - 8 weeks from order placement.