SOLGW M4-EXO2
Sons of Liberty Gun Works · Carbine · Discontinued · 2021
Also known as: Sons of Liberty M4-EXO2, SOLGW EXO2
Overview
The SOLGW M4-EXO2 is a duty-grade AR-15 carbine from Sons of Liberty Gun Works, built around a 16-inch government-profile 4150 chrome-moly-vanadium barrel with a 1-in-7 twist, QPQ nitride finish, and a mid-length gas system fed through an SOLGW Lo-Pro 4140 nitrided gas block. The rifle wears the free-floating EXO2 M-LOK handguard, premium SOLGW forged receivers, and an SOLGW bolt carrier group machined from Carpenter 158 steel with HPT/MPI testing. It served as SOLGW's value-focused patrol and home-defense rifle before being superseded by the EXO3 series in 2024.
Specifications
| Weight (empty) | 3005 g (106.0 oz) |
| Weight (loaded) | 3495 g (123.3 oz) |
| Overall Length | 914 mm (35.98") |
| Barrel Length | 406 mm (15.98") |
| Action Type | Gas Operated Direct Impingement |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Trigger Pull | 24 N (5.4 lbf) |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 930 m/s (3051 fps) |
| Muzzle Energy | 1730 J (1276 ft·lbf) |
| Effective Range | 500 m (547 yd) |
| Maximum Range | 3600 m (3937 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 178 mm (7.01") |
| Number of Grooves | 6 |
| Frame Material | Aluminum Alloy |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Qpq Nitride |
Calibers
- 5.56x45mm NATO · primary · 5.56x45mm NATO — also known as 5.56mm NATO, 5.56x45mm, .223 Remington
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety Selector
- Features: Free Floating Handguard, M Lok Attachment, Exo2 Rail, Mid Length Gas System, Government Profile Barrel, Qpq Nitride Barrel, Hpt Mpi Tested, Carpenter 158 Bolt, Lo Pro Gas Block, Flat Top Receiver, Picatinny Rail, Rotating Bolt
Variants
- SOLGW M4-EXO2 11.5" Pistol - Pistol
- SOLGW M4-EXO2 14.5" P&W - Pinned Welded
Production
Production years: 2021-2024
Civilian and law-enforcement market rifle; superseded by the M4-EXO3
Origin
Country of origin: United States
Discontinued: 2024
Notes
The EXO2 was replaced in SOLGW's lineup by the M4-EXO3, which introduced the slimmer seven-sided rail and A5 buffer system. Barrel is 1/2-28 threaded with an M4 feed ramp extension and .750 gas block journal. Offered in 16-inch rifle, 14.5-inch pinned-and-welded, and 11.5-inch SBR/pistol configurations. Lifetime warranty.
Background
The EXO2 established the SOLGW formula of full-auto-rated, torture-tested reliability at an approachable price point, earning a following among patrol officers and home defenders before the EXO3 refined the platform.