Luth-AR Mark 12 Complete Upper 5.56 18in Barrel 1:9 Twist Free Float KeyMod Rail

Luth-AR Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 PicatinnyKey MOD A2 Flash Hider Anodized. 56mm Lightweight barrel made from 4150 Chrome Molly with a 1-9 twist mated to Luth-AR A3 Flattop receiver which includes bolt carrier charging handle forward assist and ejection port cover. The upper is then topped off with Luth-AR Lo-profile gas system and ergonomic 15in Palm Handguard with KeyMod slots and a Picatinny top-rail. Specifications for Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly: Manufacturer: Luth-AR Caliber: 5.56x45mm NATO Overall Length: 27 in Barrel Length: 18 in Barrel Profile: Government Gas System Length: Rifle Length Barrel Twist Rate: 1-9 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: AR-15 Fabric/Material: 4140 Chrome Moly Gas Block Journal Size-Diameter: .750 in Handguard Length: 15 in Handguard Style: Round Rail Gun Rail: KeyMod Gun Make: AR Platform Barrel Material: 416R Stainless Steel Weight: 8 lb Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Magazine Included: No Country of Origin: USA Features of Luth-AR AR-15 MARK12 Complete Upper Barrel Receiver Assembly 18 inch Mark12 Barrel 5.56 mm 4140 Chrome Moly Threaded Barrel - Thread Pitch 1/2 x 28 1-9 RH Barrel Twist 6 Lands and Groves M4 Feed Ramp Button Broached Package Contents: Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly What firearm models does the manufacturer say Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly is compatible with? The manufacturer suggests that Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly is compatible with AR-15Luth-AR BAA3-M12: Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 Picatinny M-LOK A2 Flash Hider Anodized Manganese Phosphate Black