Midwest Industries MILRB Lower Receiver Block Blu Polymer for Mil-Spec AR-15 Lower

Designed to work with Mil-Spec AR15 forged lowers, High-strength polymer construction, Allows for gas block roll pin installation, Mounting holes for attachment to bench or alternative work surface, Parallel edges for vice use, Trigger guard installation section, Allows lower to be held for multiple aspects of assembly, Fire control pin assembly, Able to hold complete firearm for maintenance, Small parts tray