ProMag Armorer's Lower Receiver Action Block AR-10 Polymer

Building or maintaining an AR-10 gets a lot easier with a dedicated lower receiver action block. The ProMag Armorer's AR-10 Lower Receiver Action Block is a simple, indispensable gunsmithing tool that clamps into your workbench vise and securely holds your lower receiver while you install parts or perform detailed cleaning and maintenance. Whether you're assembling your first .308 rifle or working through a collection, this block frees up both your hands for precision work — a luxury when you're fitting trigger groups, installing buffer tubes, or doing thorough post-range cleaning.

Made from injection-molded polymer and manufactured in the USA, this action block is built to take the daily wear of the armorer's bench. The design accommodates popular AR-10 lower receivers, including Armalite, DPMS, Remington, SR-25, and other standard variants. Its straightforward clamping system means setup is quick and tear-down even quicker — no special vise hardware needed beyond the bench vise you probably already have.

If you're serious about keeping your rifles tuned or getting builds done right, a good vise block pays for itself in time saved and frustration avoided. This one handles the job without fuss.

Key Features

• Injection-molded polymer construction for durability and long bench life
• Secures AR-10 lower receivers for hands-free parts installation and maintenance
• Clamps into standard workbench vise for solid, stable mounting
• Compatible with Armalite, DPMS, Remington, SR-25, and similar AR-10 lower receivers
• Made in the USA
• Frees both hands for precision gunsmithing tasks

Specifications

Frequently Asked Questions

Will this AR-10 action block work with my lower receiver?

The ProMag block is designed to accommodate popular AR-10 lower receivers including Armalite, DPMS, Remington, SR-25, and similar models. If you have a standard AR-10 pattern lower from one of those manufacturers, it should fit securely.

What vise do I need to use this block?

Any standard workbench vise will work. The action block clamps into your existing vise using its clamping mechanism — no special hardware required beyond the vise you likely already have on your bench.

Is this tool suitable for both rifle assembly and maintenance?

Yes. The block provides a stable, hands-free holding point for both building AR-10s from the ground up and performing detailed cleaning, maintenance, and parts work on existing rifles.

Is this made in the USA?

Yes, the ProMag Armorer's AR-10 Lower Receiver Action Block is manufactured in the USA.