One of Bushmaster's most popular carbine models, the M4 type features a distinctive military barrel profile and six position telescoping buttstock - great for 3 Gun Match shooting, home defense and law enforcement use. The Bushmaster A3 type Patrolman carbines are modeled after the M4 type carbines, but with additional barrel length to make them legal for sale to individual officers. Features a chrome-lined barrel, birdcage flash suppressor, A3 upper receiver with picatinny rail, and removable carry handle and rear sight. Shipped with a 30 round magazine. The A3 Type Patrolman's Carbine includes a removable carry handle - adjustment range is from 300 to 600 meters (1/2 M.O.A. elevation and 1/2 M.O.A. windage). Once the carry handle is removed, a wide variety of scopes, red dot or holographic sights, or night vision equipment may be mounted on the upper receiver's integral picatinny rail. Iron sight zero is completely repeatable when the handle is reattached by means of its knurled knobs.