Sons Of Liberty Gun Works Simple Jack 13.7 Rifle


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SOLGW M4-SIMPLEJACK-13.7 is one of Sons of Liberty Gun Works premier AR 15 Rifles, featuring a 13.7-inch barrel made from 4150 CrMoV steel with a 1:7 twist rate that’s been high-pressure tested and magnetic particle inspected. The upper receiver of the M4-SIMPLEJACK-13.7 also has a .750 inch gas block Journal and an appropriately sized gas port to ensure maximum efficiency. This rifle comes outfitted with B5 systems stock, pistol grip, a Magpul MOE SL handguard, Larue Tactical MBT-2S Flat Trigger, and a HRF Concepts Magwell!



  • 13.7″ Government contour
  • 5.56 NATO Chamber
  • 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)
  • 1:7 Twist Rate
  • 1/2×28 Threaded Muzzle
  • .750″ Gas Block Journal w/Appropriately sized gas port
  • Chrome Plated Stripes BCG
  • QPQ coated M4 Feed Ramp Barrel Extension
  • Sons of Liberty “F” marked Front Sight Block
  • Mid Length Melonited Stainless Steel Gas Block
  • Magpul SL Mid-length Hand guard
  • Pinned 9 Port NOX 5.56 Muzzle Device Keymo


  • Forged 7075-T6 Aluminum with Type II Hardcoat and Bright Dip
  • Machine finished to improve tolerances
  • Matte black hard-coat anodized finish
  • Compatible with Mil-Spec parts and receivers
  • SOLGW M4 Stripes Lower Receiver
  • HRF Concepts Enhanced Magwell
  • Larue Tactical MBT-2S Flat Trigger


  • Mil-Spec Buffer System
  • 6 Position Mil-Spec Receiver Extension Tube made from 7075-T6 Aluminum
  • H Buffer
  • Sprinco Blue Spring
  • Mil-Spec Receiver End Plate with staked Castle Nut


  • B5 Systems Aluminum Trigger Guard
  • B5 Systems Grip
  • B5 Systems Bravo Stock


  • SOLGW M4 Simple Jack 13.7 Rifle
  • Tactical Soft Case
  • (3) SOLGW 30rd Mags

Additional information

Weight 128 oz
Dimensions 48 × 12 × 6 in

1 review for Sons Of Liberty Gun Works Simple Jack 13.7 Rifle

  1. Ser Pico De Gallo (verified owner)

    Big THANKS to BIG TEX for what you guys do. I think the stars aligned on this one. I have been wanting a SOLGW rifle for some time and I like all of the models but the Patrol SL always got my attention when i’d scroll past. Then over Labor Day Mike from SOLGW said they were having a sale so I figured i’d snag some peripheral stuff like shirts and swag while the sale was going on. Saw they had the “Veil Solutions Tomahawk” in stock on their site and that the order would be fulfilled through Big Tex Ordnance which is where I first found you guys. Next day it went back out of stock so I went browsing on a few other distribution sites but went with BTO because I came across the “Simple Jack” which I had not heard anything about or that it had been released. Watched the video in the description of Chuck and Jack (ya boi AT) and I was sold, had to have it. It was my first time buying a firearm online and the experience with BTO was nothing short of amazing. Decided to change the FFL I wanted to use after my order was placed and BTO responded within a day and adjusted the order and I picked the rifle up within this past week. Great selection, great customer service, already placed another order, will be coming back, will be spreading the word. Pleasure doing business ya’ll, God Bless.

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