All size AR-15 GAS TUBE
304 stainless steel
• Pistol length - Suitable for 7.5 to 10.3 inch short barrel
• Carbine length - Standard for M4, suitable for barrels from 10.5 to 16 inches
• Mid-length - Suitable for barrels from 14.5 to 18 inches, a common configuration for modern civilian rifles.
• Rifle length - M16 standard configuration, with a barrel longer than 18 inches