Product Description
10.5 MK-18 Upper M4A1 1/7 Chrome Lined MI Quadrail
We started with a 5.56 10.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with a phosphate finish and chrome lining. The upper receiver is T marked and is type 3 hard coat black. This does have M4 ramps. The Flash hider is a A2 this is for PISTOL OR SBR USE ONLY. It is also made of chrome-moly steel and HP tested. Our barrels are Mil-Spec or better. We recommend a 55gr or 62gr bullet for best accuracy. The front sight is a A2 F-Marked with bayonet lug and attached with taper pins. A Midwest Industries quad rail is included. Gas port size is .076.
Specs:
Upper: Cardinal, Performance Forge or Anchor Harvey Forged upper with M4 ramps
Barrel: 4150 10.5" 1/7 5.56 NATO M4A1 chrome lined button rifled barrel
Gas System: Carbine
Gas Block: F-Marked A2
Handguard: Midwest Industries Quad Rail
Flash Hider: A2
BCG: Optional
Charging Handle: Optional
