Build a Complete 18″ MARK 12 5.56 mm Barrel, AR Carbine Kit
This kit contains everything you need to build your own AR except the stripped lower receiver.
The Kit Contains:
- Fully assembled 18″ MARK 12 5.56 mmUpper with 15″ Keymod Palm Handguard®
- MBA-3 Adjustable Carbine Buttstock Assembly
- Complete Lower Parts Kit
Add to your build with optional add-on parts such as a Velocity Drop-in trigger, or The Lower Enhanc-AR® Kit.
This Kit does not come with the lower receiver. You will have to supply a lower receiver purchased elsewhere. We recommend that you look for a Mil-Spec stripped lower.
Includes:
- MBA-3 Adjustable Carbine Buttstock Assembly
- LRPK-1 Complete .223/5.56 Lower Receiver Parts Kit
18″ Mark 12 5.56 mm Complete Upper Barrel Assembly
Includes:
- HG-V-15K – Palm Handguard® – Vented 15″ KeyMod with Barrel Nut
- BAA3-M12 – 18″ Mark12 5.56 mm Barrel
- FTT-EA1 – A3 Upper Receiver Assembled
- BC-A-223 – Fully Assembled Bolt Carrier
- BL-04 – Standard Gas Tube
- GB-LP750 – Gas Block .750
- BL-06-A2 — A2 Flash Hider
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 Groves
- M4 Feed Ramp
- Button Broached
SKU: RKM12-18-3
