Ar Lower Receiver Blocks - Ar .308 Lower Receiver Block Polymer

Lower Receiver Blocks high strength polymer construction! AR-15 Lower Receiver Block Weight: 12 oz AR-15 Height: 6.5" Length: 5.0" Width: 1.25" AR .308 Lower Receiver Block Weight: 12.2 oz AR .308 Height: 6.5" Length: 5.0" Width: 1.25" Allows for gas block roll pin installation Mounting holes for attachment to bench or alternative work surface 4 points of contact for vice use Trigger guard installation section Allows lower to be held for multiple aspects of assembly Fire cont