Quick view Bravo Company Machine Bravo Bcm, Bcm 4-ur-m4 Upper Assby Flattop M4 $165.41 $146.13 Bravo's bcm m4 upper receiver assembly is precision machined to correct mil-specs from 7075 t6 forgings extension, providing the user with superior strength when dropped or when mortaring malfunction clearance drills.It has mil-std 1913 rail for mounting... Compare Add to Cart