Sons of Liberty Gun Works M4-EXO3 5.56 NATO AR-15 Rifle – 16" Nitrided Barrel, Free-Float M-LOK Rail, Collapsible Stock
The M4-EXO3 from Sons of Liberty Gun Works is a duty-grade AR-15 built for reliability and accuracy. A nitrided 16-inch 4150 CMV barrel with a mid-length gas system, a free-float EXO3 M-LOK handguard, and SOLGW’s nickel-PTFE-coated Liberty Fighting Trigger make this rifle stand out for both shooters and collectors seeking a hard-use platform.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling – Sharp lands and grooves.
Specific Condition Notes: This rifle shows only minimal handling marks; the bore remains bright and clean.
What’s Included
- Sons of Liberty Gun Works M4-EXO3 rifle
- One 30-round Magpul PMAG Gen M3 polymer magazine
- One 10-round Magpul PMAG Gen M3 polymer magazine
SOLGW machines the upper and lower receivers from 7075-T6 aluminum and protects them with a Type III hard-coat anodized finish for long-term corrosion resistance.
The 16-inch barrel is nitrided inside and out, paired with a 4140 steel barrel nut that uses anti-rotation tension screws to keep the EXO3 free-float handguard locked in place.
A mid-length gas system moderates recoil impulse, while the staked castle nut and HPT/MPI-inspected critical components underline the rifle’s duty-ready build quality.
The nickel-PTFE-coated single-stage Liberty Fighting Trigger breaks at roughly 6 lb for a clean, consistent pull, and the 6-position collapsible stock allows quick length-of-pull adjustments.
Both the upper and handguard feature M-LOK attachment slots for accessories, and the 1/2-28 threaded muzzle is ready for brakes, flash hiders, or suppressors.