ProMag PM123A AR-15 Lower Receiver Vise Block Set - 3 Piece Kit

The ProMag PM123A Lower Receiver Vise Block Set provides secure, non-marring support for AR-15 and M16 lower receivers during assembly, maintenance, and repair work. This three-piece polymer kit eliminates the need for improvised clamping methods that can damage expensive receivers.

What Makes This Different

Unlike generic vise blocks that rely on magazine well insertion alone, this system distributes clamping pressure across multiple contact points on the lower receiver. The black polymer construction resists marring and scratching compared to aluminum alternatives. Each piece features precision-molded contact surfaces that match AR-15/M16 receiver geometry exactly.

Key Features

• Three-piece design provides multiple clamping configurations for different procedures
• High-impact polymer construction prevents receiver damage during clamping
• Compatible with standard bench vises and specialized gunsmithing vises
• Precision-molded contact surfaces match mil-spec receiver dimensions
• Magazine well block accommodates both .223/5.56 and larger caliber lowers
• Non-slip surface texture maintains secure grip under torque loads
• Compact storage design takes minimal bench space

This vise block set handles tasks from basic field stripping to complete lower receiver rebuilds. The primary magazine well block secures receivers for stock installation, trigger group work, and barrel nut removal. Secondary blocks provide additional support points for complex procedures requiring multiple contact areas. The polymer material maintains grip even when contaminated with cleaning solvents or lubricants.

Technical Specs

• Material: High-impact black polymer
• Compatibility: AR-15, M16, and mil-spec derivatives
• Pieces included: 3-piece complete set
• Magazine well block accommodates standard and magwell-modified lowers
• Vise jaw compatibility: Standard 4-6 inch bench vises
• Weight: Approximately 8 ounces total
• Manufacturer: ProMag Industries

Professional gunsmiths and serious enthusiasts recognize that proper receiver support prevents costly damage during maintenance procedures. This block set delivers that protection at a fraction of the cost of damaged components.