Infinite Arms is proud to now offer complete M4 uppers. These are built for us by a "well known company, but we can't tell you who due to the price.
Mil-spec certified 4140 chrome-moly vanadium steel M4 contour barrel
5.56x45 NATO chamber
1/9 twist
Hard chrome lined chamber and bore
M4 feed ramps
11 degree recessed target crown
Parkerized Barrel
A2 Flash hider installed with Peel washer
Forged A3 upper receivers are T marked and have extended feed ramp cuts (M4 ramps)
Semi Auto Bolt Assembly
Single or Quad railed gas block
Test fired