Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle Black. 308 A3 Upper Receiver is machined from 6061-T6 aluminum extrusion for excellent strength and features black hard coat anodized finish for wear resistance. Specifications for Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle: Manufacturer: Luth-AR Color: Black Finish: Hard-Coat Anodized Fabric/Material: 7075-T6 Aluminum Caliber: .308 Winchester Gun Make: AR Platform Gun Model: DPMS LR-308 Included Accessories: Charging Handle Condition: New Projectile Caliber: .308 Caliber Weight: 1.5 lb Features of Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle: Charging handle Ejection port door installed Hard Coat Anodized Black 6061-T6 Aluminum Extrusion .275 Takedown pin holes 1913 Picatinny Rail is .151? low profile DPMS (Gen1) A3 low receiver height Package Contents: Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle What firearm models does the manufacturer say Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle is compatible with? The manufacturer says that Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle is compatible with DPMS LR-308Luth-AR 308-FTT-EA1: DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle Black