M4 CA Compliant Header RSR


Getting these in the hands of more Americans, who are liked minded like us, regardless of where they geographically lived, was something that was important to us. The rifle specifications are pretty standard but for them to get behind enemy lines, we’d had to team up with the folks at CompMag. CompMags Specs:

  • 10 Round Capacity
  • Locks into the magazine well with an expandable insert built right into the side of it
  • Two minutes to install. To minutes to remove, should you decide to shoot outside of California
  • 17-7 stainless steel magazine spring
  • Holds the bolt open after the last round is fired
  • Allows for easy clearing of type 3 malfunctions (such as double feeds)
All other features of the rifle are the same and can be made in any variant SOLGW has to offer: Patrol SL or M-89
  • Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel
  • Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)
  • Twist Rate: 1/7 Twist Six Groove
  • Thread Pitch: 1/2-28 Threaded Muzzle
  • Gas Block: .750″ Gas Block Journal with appropriately sized gas port
  • Barrel Finish: QPQ Corrosion Resistant Finish
  • Barrel Extension: QPQ coated M4 Feed Ramp Extension
  • High Pressure (proof) Tested (HPT)
  • Magnetic Particle Inspected (MPI)
Available in the following models and barrel lengths (Patrol SL and M-89):

  • 13.7″ 5.56 (Midlength Gas System with P/W Nox & B5 Stock)
  • 16″ 5.56 (Midlength Gas System with A2 muzzle device & B5 Stock)