ProMag manufactures the PM123 as an affordable gunsmithing tool designed specifically for AR-15 and M16 lower receiver assembly, maintenance, and parts installation. This magazine well vise block provides secure clamping in a bench vise to give shooters and builders a stable third hand when working on lower receiver components.
Key Features
- Platform compatibility: AR-15 and M16 lower receivers
- Construction: Heavy duty black polymer
- Design: Magazine well insert style vise block
- Installation: Inserts into magazine well and clamps in bench vise
- Made in the USA
- Mil-Spec dimensions for standard forged and billet lower receivers
- Parallel edges for secure clamping in vise jaws
Special Features
- Heavy duty polymer construction provides durability while protecting aluminum lower receivers from marring and damage
- Magazine well insert design secures lower receiver by its strongest and most rigid point
- Black polymer material will not scratch or damage anodized finishes during assembly work
- Simple installation requires only inserting block into magazine well and clamping in standard bench vise
- Parallel edges ensure secure grip in vise jaws without slipping during parts installation
- Lightweight design makes storage and transport convenient for home workshops and range bags
- Universal fit works with all Mil-Spec AR-15 and M16 pattern lower receivers regardless of manufacturer
Practical Benefits
- Provides secure third hand support when installing trigger groups, buffer tubes, pistol grips, and other lower receiver components
- Holds lower receiver steady when driving roll pins and installing takedown pins
- Protects lower receiver finish from vise jaw damage during assembly and maintenance work
- Allows both hands free operation when staking castle nuts and installing safety selectors
- Economical alternative to expensive aluminum vise blocks for occasional builders and home gunsmiths
- Lightweight polymer construction prevents accidental damage to lower receiver compared to metal blocks
- Ideal for AR-15 builders, home gunsmiths, hobbyists, and shooters performing their own maintenance and upgrades
- Works equally well for complete builds, parts swaps, and routine maintenance tasks
The ProMag PM123 Lower Receiver Vise Block is a solid fit for AR-15 builders and owners seeking an affordable, protective tool for lower receiver assembly and maintenance work.
| MANUFACTURER | PROMAG |