Luth-AR RKM12-18 AR-15 5.56 Complete Mark 12 Barrel Kit 18" 1:9 KeyMod

Overview

Luth-AR 5.56 Complete Mark 12 Barrel Kit for AR-15.

Kit includes a fully assembled Mark 12 upper with an 18" Mark 12 5.56 barrel and a 15" KeyMod palm/vinted handguard, plus a buttstock assembly and a complete lower parts kit.

Barrel & Handguard

• Caliber: .223 Remington / 5.56x45mm NATO
• Barrel length: 18 in
• Barrel profile: Government
• Gas system length: Rifle length
• Twist rate: 1:9 RH
• Lands & grooves: 6
• Feed ramps: M4
• Thread pitch: 1/2 x 28
• Handguard: 15 in free-float, KeyMod (palm/vinted)

Muzzle Device

• A2 flash hider

Finish & Materials

• Barrel steel: 4140 chrome-moly steel
• Finish: manganese phosphate
• Upper forging: 7075-T6 forging (hardcoat anodized)
• Color: Black

Fitment / Interfaces

• Barrel journal size: .750 in
• Gun rail: KeyMod

Package Contents (as listed)

• Fully assembled Mark 12 5.56mm upper with 15in KeyMod palm handguard
• Buttstock assembly (black): fixed or collapsible
  • 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: bolt carrier group, standard gas tube, A2 flash hider, A3 upper receiver assembled, .750 gas block, 15" KeyMod/MLOK/smooth handguard with barrel nut