Xm-15 Complete Upper W-bolt 450bm 16"bbl NS Black Fold out to fill

Fold out to fill

- Weight: 2

- Virtually unbreakable machined aircraft aluminum

50”x 2” x 2

- Surface Finish: Brown

Xm-15 Complete Upper W-bolt 450bm 16"bbl NS Black Fold out to fillThis drop in A3 upper will mount to virtually any standard AR 15 mil spec lower receiver. With a velocity of 2200 FPS, the Hornady 250 Grain SST FT bullet in the 450 Bushmaster "Thumper" is designed for all large North American game. Though not a long distance cartridge, accuracy has proved to be exceptional out to 200 yards with felt recoil similar to a 20 gauge shotgun. The tubular aluminum forend allows the barrel to free float from the nut