The Luth-AR 5.56 Complete Mark 12 Barrel Kit features an 18 inch Mark 12 5.56mm barrel and a 15in KeyMod short mid-length rail, so you can build a customized upper to add onto your stripped lower receiver. These AR15 Upper Receivers by Luth-AR are built tough with 4140 Chrome Moly steel with a 1-9 twist rate to ensure the accuracy you need from your rifle. This Luth-AR 5.56 Complete Mark 12 Barrel Rifle Upper Receiver Kit is also designed with 6 lands and groves, so you can use a variety of accessories and optics with this barrel. Button broaching adds extra strength and prevents the parts from corroding over time. You can also mount a suppressor or any other device you desire with this kit. The Luth-AR 5.56 Complete Mark 12 Barrel Mid-Length RH Barrel Kit features an attachment rail on the handguard, so you can easily install an A2 flash suppressor or other device that requires a mountable rail. Specifications for Luth-AR 5.56 Complete Mark 12 Barrel Kit: Manufacturer: Luth-AR Cartridge: .223 Remington, 5.56x45mm NATO Overall Length: 27 in Number of Sling Points: 2 Barrel Length: 18 in Barrel Profile: Government Gas System Length: Rifle Length Barrel Twist Rate: 1-9 Threads per Inch: 1/2×28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Manganese Phosphate 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 Type: Rifle Gun Make: AR Platform Additional Features: Will need GT-CUP Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Weight: 12 lb, 11 lb Magazine Included: No Features of Luth-AR 5.56 Complete Mark 12 Barrel Kit Upper Specs: 7075-T6 Forging Hardcoat anodize Black Bolt Specs: Bolt: Carpenter 158 steel Extractor: 4140 Alloy steel Army Spec Heat Treatment Manganese Phosphate Bolt Carrier Specs: Carrier: 8620 steel Cam pin: 4340 Alloy steel Carrier key: 4130 Alloy steel Army Spec Heat Treatment Manganese Phosphate Barrel Specs: 18″ Mark 12 5.56 mm Barrel 5.56 mm 4140 Chrome Moly Threaded Barrel – Thread Pitch 1/2 x 28 1-9 RH Barrel Twist 6 Lands and Grooves M4 Feed Ramp Button Broached Package Contents: Luth-AR 5.56 Complete Mark 12 Barrel Kit Fully assembled Mark 12 5.56mm Upper with 15in Keymod Palm Handguard Buttstock Assembly (Black)- Fixed Buttstock OR Collapsible Buttstock MBA-1 Fixed Rifle Buttstock Assembly MBA-3 Adjustable Carbine Buttstock Assembly Complete Lower Parts Kit (LRPK-1 Complete .223/5.56 Lower Receiver Parts Kit) Includes: BAA3-M12 – 18″ Mark12 5.56 mm Barrel BC-A-223 – Fully Assembled Bolt Carrier BL-04 – Standard Gas Tube BL-06-A2 – A2 Flash Hider FTT-EA1 – A3 Upper Receiver Assembled GB-LP750 – Gas Block .750 HG-V-15K – Palm Handguard® – Vented 15″ KeyMod/MLOK/Smooth with Barrel NutFeatures of Luth-AR AR-15 Complete MARK 12 Barrel Kit
3 reviews for Luth-AR 5.56 Complete Mark 12 Barrel Kit
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IOVVOI –
Bought this for my first AR build and I gotta say was very pleased with Luth-AR 5.56 Complete MARK12 Barrel Kit. Shipping was fast and packaged nicely. Comes with the MBA3 stock, which btw looks and feels right because, of the adjustments one can make with the cheek riser and shoulder rest. The picatinny rail on the stock makes mounting a sling on it easy and convenient along with the GrovTec Heavy Duty Push Button Swivel Assy. Excellent customer service. When I first took it to the range the hammer pins were walking and a few light primer strikes so, I called Luth-AR and talked to Paul (Thanks Paul), he asked me if the hammer spring was in upside down and sure enough it was. Flipped around and now works great.
Mick –
Unboxing review: Items were packaged properly and securely. There was no excessive packing grease, YAY! All parts were in good condition including the bolt and bolt carrier. The bore of the barrel was clean and the grooves looked flawless to the naked eye. Only negative complaint I have is that the handguard was off center when the manufacture assembled it. I loosened the hand guard screws and took the hand guard off to re-center it in proper position. You may have to wiggle and work the hand guard into proper position with the use of some standardized tools…. a flat head screw driver and a small file to clean up some of the burrs on the inside of the hand guard… pretty simple stuff if you come from the AK community haha. Within a few minutes I had the hand guard back on and secured back into proper position. One more thing to mention, the BARREL!! Idk if it's standard for 18" barrels to be so thick, but this barrel is thick… its not one of those pencil thin barrels you get with your standard AR platform.
Chad –
Ordered and received on time. Everything was in perfect condition. put everything on my lower and went and shot. No problems what so ever. top-notch barrel and receiver. the bolt is military-grade. Will purchase another.