MIL-S-63348 Revision A, August 20, 1981
SUBMACHINE GUN, 5.56MM, PORT FIRING, M231
Includes all amendments and changes through Validation Notice 3, November 26, 2013
Additional Comments: INACTIVE FOR NEW DESIGN
This specification contains requirements, quality assurance provisions, and packaging for the Submachinegun, 5.56MM, Port Firing, M231.