Lower Receiver Parts
Lower Parts Kit, Minimalist w/Grip
When you're planning a new build, some parts just beg to be customized. Components like the hammer & trigger, selector, and trigger guard are really ...
Lower Parts Kit, Billet
This Umbrella kit supplements the parts included with our billet lower but we purposely leave out the trigger--we expect most of you will want to go ...
Lower Parts Kit, Forged
While not strictly limited to Umbrella receivers, we put this kit together as a high quality option for customers looking to build-out their forged, ...
B5 QD End Plate
Enhanced Buffer Spring
Every rifle that we build for military/LE demo use, research and development, test and evaluation, or the occasional charity gun all use action sprin...