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

The Midwest Industries MILRB Lower Receiver Block is a heavy-duty bench fixture purpose-built for working on Mil-Spec AR-15 forged lower receivers. Molded from high-strength polymer in a distinctive blue finish, this multi-function block combines a traditional lower receiver block, a gas block roll pin installation support, and a magazine vice block into a single compact unit. The result is a purpose-built cradle that securely supports the receiver on its side for cleaning, disassembly, and component installation without improvising with wood blocks or spare magazines.

The MILRB is sized at 6.5" tall x 5.0" long x 1.25" wide and weighs just 12 oz, giving it a stable, low-profile footprint on the bench. The high-density polymer stands up to repeated punch and hammer work, and the integrated magazine-well cavity doubles as a vice for magazine maintenance or component assembly. Made in USA by Midwest Industries, the MILRB is the kind of tool you leave on the bench year-round because it earns its space.