Brownells 75th Anniversary - A Shooting Heritage

The SOLGW M4-EXO2 is a great entry level Complete AR-15 rifle that comes with all the features you want for a reliable, do-it-all carbine built for duty. This model features a 16” barrel machined from 4150 chrome moly vanadium steel and QPQ Nitride finished inside and out. The six groove 1/7 twist rate is optimal for heavy 62 grain 5.56 NATO surplus ammunition. The Mid-length gas system and appropriate gas port size ensures reliable function under any conditions and minimal recoil. The government profile barrel and gas system are protected by the EXO2 free float handguard with M-LOK slots for full customization potential. Build your duty rifle today with Sons of Liberty Gun Works.


  • 13.7” 5.56 NATO barrel
  • 4150 chrome moly vanadium steel
  • HPT and MPI
  • QPQ Nitride finish
  • 1/7 twist rate
  • Mid-Length gas system
  • 4140 steel .750” gas block
  • EXO2 M-LOK free float handguard
  • NOX Muzzle Device Pinned
  • 7075-T6 aluminum Cerra forged receivers
  • Type III Class 2 hardcoat anodized black
  • Mod 4 Charging Handle
  • Liberty Fighting Trigger
  • B5 System Grip
  • B5 Systems stock
  • H buffer system with Sprinco springs
  • T-Marked upper
  • Dry film lube bolt carrier channel

The EXO2 handguard features the pinch-lock barrel nut attachment system which is one of the most durable on the market. It also features 45° M-LOK slots at the front for more light and accessory mounting options. The upper receiver is made from 7075-T6 aluminum Cerra forgings and type III class 2 hardcoat anodized black. The upper receiver comes with the forward assist and dust cover assembled as well as an SOLGW BCG and Mod4  charging handle. The inside of the receiver has a dry film lube applied to decrease friction with the bolt carrier for smooth function.

The lower receiver is decked out with aftermarket furniture like the B5 systems carbine stock and pistol grip for better ergonomics than standard Mil-Spec equipment. It utilizes a heavy buffer system for optimal reliability and low recoil when combined with the mid-length gas system. It also features the Angry Patriot lower receiver engraving. *lower may change based on availability

Sons of Liberty Gun Works is a custom rifle manufacturer in the United States that specializes on the AR-15 platform. They began producing purpose-built weapons for law enforcement and civilians alike and are given a lot of praise for focusing on the details that make an AR reliable. Function over form is what their rifles are known for and they are guaranteed to get the job done. From full rifles to individual parts, you can’t go wrong with SOLGW.


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