
Availability: In Stock
The ProMag PM123A AR-15/M16 lower receiver vise block set is a three-piece clamping system built to keep your receiver stable and damage-free during assembly, disassembly, and maintenance. Whether you're working on your flat-top or carry-handle upper and lower receivers, these polymer blocks secure your components firmly in a bench vise so you can focus on the work—not holding things steady. The set's impact-resistant design handles the rigors of the gunsmith's bench and the home shop alike.
Made from glass-filled nylon, each block is engineered to distribute clamping pressure without marring your receiver's finish. Unlike steel clamps that can ding and scratch, these polymer blocks cradle AR-15 and M16 components with the security you need and the protection your firearm deserves. The three-piece configuration gives you flexibility to support both upper and lower receiver work, making this a practical addition to any AR platform builder's toolkit.
This is the kind of accessory that makes the difference between a clean, professional job and one marked by vise marks and frustration. If you're serious about keeping your AR-15 or M16 in top condition, or you're building and customizing with precision, these blocks are worth having in your shop.
| Brand | Pro Mag |
| Model | PM123A |
| Piece Count | 3 |
| Material | Glass-filled nylon polymer |
| Color | Black |
| Compatibility | AR-15/M16 receivers (flat-top and carry-handle) |
Yes. The three-piece set is designed to support both upper and lower receiver components on AR-15 and M16 platforms with either flat-top or carry-handle configurations.
The PM123A is a three-piece set of polymer vise blocks designed to work together to clamp and stabilize receiver components.
No. The blocks are made from impact-resistant glass-filled nylon, which is softer than metal and designed to protect your receiver from marring or scratching during vise clamping.
You'll need a standard bench vise to secure the blocks and receiver together. The blocks themselves require no special tools to use.

SKU: 115680862 • Width: 10.9in • Height: 2.5in • Depth: 11.6in • Weight: 2.15oz





Availability: In Stock
The ProMag PM123A AR-15/M16 lower receiver vise block set is a three-piece clamping system built to keep your receiver stable and damage-free during assembly, disassembly, and maintenance. Whether you're working on your flat-top or carry-handle upper and lower receivers, these polymer blocks secure your components firmly in a bench vise so you can focus on the work—not holding things steady. The set's impact-resistant design handles the rigors of the gunsmith's bench and the home shop alike.
Made from glass-filled nylon, each block is engineered to distribute clamping pressure without marring your receiver's finish. Unlike steel clamps that can ding and scratch, these polymer blocks cradle AR-15 and M16 components with the security you need and the protection your firearm deserves. The three-piece configuration gives you flexibility to support both upper and lower receiver work, making this a practical addition to any AR platform builder's toolkit.
This is the kind of accessory that makes the difference between a clean, professional job and one marked by vise marks and frustration. If you're serious about keeping your AR-15 or M16 in top condition, or you're building and customizing with precision, these blocks are worth having in your shop.
| Brand | Pro Mag |
| Model | PM123A |
| Piece Count | 3 |
| Material | Glass-filled nylon polymer |
| Color | Black |
| Compatibility | AR-15/M16 receivers (flat-top and carry-handle) |
Yes. The three-piece set is designed to support both upper and lower receiver components on AR-15 and M16 platforms with either flat-top or carry-handle configurations.
The PM123A is a three-piece set of polymer vise blocks designed to work together to clamp and stabilize receiver components.
No. The blocks are made from impact-resistant glass-filled nylon, which is softer than metal and designed to protect your receiver from marring or scratching during vise clamping.
You'll need a standard bench vise to secure the blocks and receiver together. The blocks themselves require no special tools to use.
SKU: 115680862 • Width: 10.9in • Height: 2.5in • Depth: 11.6in • Weight: 2.15oz
