LBE READY BUILD KIT 7.5 CHF BBL. 5 CHF BBL - Specifications for LBE AR75RBK READY BUILD KIT 7.5 CHF BBL: Manufacturer: LBE Unlimited Caliber: 5.56x45mm NATO .223 Remington Color: Black Gun Model: AR-15 Gun Type: Semi-Automatic Rifle Gun Make: AR Platform Length: 7.5 in LBE AR75RBK READY BUILD KIT 7.5 CHF BBL What firearm models does the manufacturer say LBE AR75RBK READY BUILD KIT 7.5 CHF BBL is compatible with? The manufacturer suggests that LBE AR75RBK READY BUILD KIT 7.5 CHF BBL is compatible with AR-15