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M16 vs M4A1
Side-by-side technical comparison
Overview
Spec
M16
M4A1
Production
1959–present
1994–present
Units produced
Over 8,000,000
Unknown
Specifications
Spec
M16
M4A1
Overall length
1006mm (39.6 in)
756mm (29.8 in) stock extended, 673mm (26.5 in) stock retracted
Barrel length
508mm (20 in)
368mm (14.5 in)
Weight
3.6 kg (7.9 lb)
3.1 kg (6.8 lb) loaded
Magazine capacity
20 or 30 rounds standard
30 rounds standard
Action type
Gas-operated, direct impingement
Gas-operated, direct impingement
Trigger type
Single-stage
Single-stage
Sights
Adjustable iron sights, carry handle with rear aperture
Adjustable iron sights, MIL-STD-1913 rail for optics
Calibers
M4A1