From the onset, Windham Weaponry has had one goal: to build the finest AR type rifles in the country. All of their firearms are built with 4150 Chrome Moly Vanadium steel barrels which are chrome-lined for long wear and ease of maintenance and 7075 T6 aircraft-grade aluminum receivers with a durable black hard coat anodize finish. Their RP11SFS-7 Pistol is built just like their rifles with a gas-impingement system that's housed in an M4-A4 flattop upper receiver. The pistols 11.5" heavy profile barrel with a 1 in 7" twist is housed in a Midwest Industries 10" SS Key Mod free float handguard with a 2" rail segment bolt. The handguard and full-length picatinny top rail ensure that the RP11SFS-7 is ready for any optics or accessories. The receiver tube is an AR pistol type with a foam sleeve that tucks comfortably in the crook of a shooter's arm. The pistol is shipped in a hard plastic gun case with one 30-round magazine.