Troy Upper Receiver Assembly AR-15 A3 223 Wylde 14.5in Barrel Ultra-Low Profile 12.5in SOCC Handguard Black. Developed specifically for todays war fighter and Law Enforcement led by Special Operations field requirements. The M-Lok Battlerail handguard is machined from hardened aircraft aluminum with stainless steel components and finished in MIL-SPEC hardcoat anodizing the SOCC MLOK rails are light and sleek. The M-LOK slots make for mounting your favorite M-LOK accessories quick and easy. Specifications for Troy AR-15 A3 14.5in 223 Wylde Upper Receiver Assembly: Manufacturer: Troy Caliber: .223 Wylde Barrel Length: 14.5 in Barrel Twist Rate: 1-7 Finish: MIL-SPEC hardcoat anodizing Color: Black Gun Model: AR-15 Condition: New Fabric/Material: Hardened Aircraft Aluminum Handguard Length: 12.5 in Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Magazine Included: No Mount Type: M-LOK Package Contents: Troy AR-15 A3 14.5in 223 Wylde Upper Receiver Assembly What firearm models does the manufacturer say Troy AR-15 A3 14.5in 223 Wylde Upper Receiver Assembly is compatible with? The manufacturer says that Troy AR-15 A3 14.5in 223 Wylde Upper Receiver Assembly is compatible with AR-15Troy SUPG-A3S-14BT-01: Upper Receiver Assembly AR-15 A3 223 Wylde 14.5in Barrel Ultra-Low Profile 12.5in SOCC Handguard Black