ProMag PM123 AR-15/M16 Lower Receiver Vise Block - Black Polymer

The ProMag PM123 Lower Receiver Magazine Well Vise Block is a purpose-built gunsmithing tool that gives you a reliable "third hand" while working on AR-15 and M16 lower receivers. The block slides directly into the rifle's magazine well, locking the stripped or assembled lower in place so you can install and service parts with both hands free.

Constructed from black injection-molded polymer, the PM123 is tough enough for repeated bench use while remaining lightweight and non-marring to your receiver's finish. The block is purpose-shaped to fit the AR-15/M16 magazine well, letting you mount the lower securely in a bench vise for punch work, spring and detent installation, trigger and hammer service, and other lower-parts maintenance.

Made in the USA to ProMag's quality standards, the PM123 is the single-piece lower receiver block from ProMag's AR vise block line and is ready to drop straight into a standard gunsmithing vise. Whether you are building a lower from a stripped receiver or performing routine maintenance on an existing one, the PM123 keeps the receiver stable, properly oriented, and protected at the mag well throughout the job.