From the onset, Windham Weaponry has had one goal: to build the finest AR type rifles in the country. All of their rifles are built with 4150 Chrome Moly Vanadium steel barrels which are chrome-lined for long wear and ease of maintenance and 7075 T6 aircraft aluminum receivers with a durable black hard coat anodize finish. Their MPC is available in a modified version designed to be compliant with state regulations in California. The MPC utilizes a gas-impingement system that's housed in an M4-A4 flattop upper receiver with a detachable carry handle. The rifle's bolt is made of Carpenter 158 Steel and its 16" M4 profile barrel has an A2 flash suppressor and a 1 in 9" right-hand twist. Other notable features include: a 6-position telescoping buttstock, windage and elevation adjustable sights, a bullet button, M4 double heat shield handguards, and an A2 black plastic grip. Each rifle ships with a hard plastic carrying case, a web sling, and one 10-round magazine and carries a lifetime warranty.