M4A1
M4A1 - M203
M4A1 - Scope
Img's from:
http://world.guns.ru/assault/as17-e.htm (It also shows any other stuff you possibly need about the gun including ammo)
Some Information:
Caliber: 5.56mm NATO
Action: Gas operated, rotating bolt
Overall length: 838 mm (stock extended); 757 mm (stock fully collapsed)
Barrel length: 370 mm
Weight: 2.52 kg without magazine; 3.0 kg with magazine loaded with 30 rounds
Rate of fire: 700 - 950 rounds per minute
Maximum effective range: 360 m
Their's your M4A1
If you can't see img's, I attached.