[CTS]

M16 and M16A1 also did not have the built in brass deflector and the rear sight was adjustable for windage only. didn't have the knob for elevation like the A2. 20 inch barrel, triangle shaped handguards. Fixed stock that was about an inch shorter than the A2 stock. Had a hinged metal cap on bottom of the pistol grip for storage. Also didn't have the finger ledge on the pistol grip, grip was smooth.