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,. The Carbon Fiber SRC utilizes a gas-impingement system that's housed in an M4-A4 flattop upper receiver with a picatinny rail gas block. The receiver is molded from a carbon fiber composite material and given a matte black finish. The SRC is free of sights and handles, leaving it open for optics and other accessories. 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: 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 magazine and carries a lifetime warranty.