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This block allows the user to work on and install parts to AR-15/M16 lower receivers. The block slips into the rifle's magazine well and is held in place by the rifle's magazine catch. It is constructed of black injection molded polymer.
| Manufacturer | Promag |
| Pricing Unit | EA |
| Model | Lower Receiver |
| UPC | 708279007576 |
| SKU | PM123 |
| Width | 2.2000 |
| Length | 5.0000 |
| Height | 0.7000 |
| Weight | 0.4000 |



FFL Required