Description M249 Shoulder Spacer Sleeve Fits the M249 and 5.56 mm Machine Gun This M249 shoulder spacer sleeve makes it possible to make repairs to your weapon. Black cylindrical metal piece, 1 inch wide with a 1/4 inch tapered end. Overall Diameter is: 1.5 inches at the taper and 1.56 inches on non-tapered end. No threads on either end. Part Number: 12956146 NSN: 5365-01-396-4043
