(pictured with upgraded CMC trigger, Ambi Charging Handle and MBUS Sights)
The M4-SUL is a more affordable version of our smash hit "Swamp Fox", while it lacks the pencil barrel, and upgraded features of the Swamp Fox, it has everything that makes our M4-SML our best selling rifle in a lighter package with an Ultra Lite Rail and MFT Stock.
Highlights:M-LOK SOLO Ultra Light Rail
16" 4150CrMoV Barrel
Heavy duty Melonited Gas Tube
At Sons of Liberty Gun Works we believe in Quality Mil-Spec or better parts. We believe there is no substitute for quality and that your gun should be built right the first time, ready for hard use right out of the box. We believe a quality Bolt Carrier Group and a quality, accurate and long lasting barrel are the heart of a Combat Grade weapon. We believe in properly tuned weapons using the correct gas system length and quality buffer system components such as the Vltor A5 system and Sprinco Tactical Buffer Springs. We believe in our products and we back them up with a Lifetime Warranty. Our weapons our meant to be used hard and go in harm’s way, they won’t let you down.
All rifles are test fired twice in shop to ensure proper function.
The M4-SUL is a step up from our entry level carbines, with upgraded rails, stock, and muzzle device. It is built with all high quality components. At Sons of Liberty Gun Works we always tell our customers, its not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications on the M4-SUL. We have built our guns to run through years of hard use, and we have nothing to hide.
Sons of Liberty Gun Works Bolt Carrier Group HPT/MPI Check out the specs here:
Barrel: Sons of Liberty Gun Works 16” 4150CoMOV 1:7 MPI HPT Barrel
Caliber: 5.56 NATO Chamber
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
Weight: 27 Ounces
Barrel Finish: QPQ Corrosion Resistant Finish
Barrel Extension: QPQ coated M4 Feed Ramp Extension
High Pressure (proof) Tested (HPT)
Magnetic Particle Inspected (MPI)
Lower Receiver: Sons of Liberty Gun Works Forged Lower Receiver – Angry Patriot
Material: Made from Mil-Spec 7075-T6 aluminum Cerra Forge forgings
Finish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodic Coating, Flat Black Dye, Non-Reflective, NiAc Seal
Contour is fully machined leaving no flash marks from the forging.
All lowers are cut with M16 auto pocket.
Safe, Fire, and Full Auto Pictograms.
Angry Patriot Roll Mark
Buffer System: Vltor A5 Buffer System designed to improve reliability while creating a smoother operating cycle.
Receiver Extension: Vltor A5 7 Position Receiver Extension Tube made from 7075-T6 Aluminum
Buffer: Vltor A5 5.8 oz. Buffer
Buffer Spring: Sprinco Green Rifle Length Spring
Receiver end plate: Standard Mil-Spec with properly staked Castle Nut
Fire Control Group: Sons of Liberty Gun Works Liberty Fighting Trigger (LFT)
Sons of Liberty Gun Works Selector
Grip: MAGPUL MOE Grip – Black
Trigger Guard: B5 Aluminum Trigger Guard of Magpul Enhanced
Stock: MFT Lightweight Battle Link Stock
Material: Made from Mil-Spec 7075-T6 aluminum Cerra Forge forgings.
Exterior Finish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodic Coating, Flat Black Dye, Non-Reflective, NiAc Seal
Interior Finish: Dry Film Lube
T-Marks: Engraved T-Marks
Gas Block: Sons of Liberty Lo-Pro Gas block made from 4140 Steel and Nitride Treated
Gas Tube: Sons of Liberty Standard Mid Length Melonited Stainless Steel
Rail System: Sons of Liberty Gun Works SOLO Ultralite Rail system.
- 14.87" Exact Top rail length
- 15" Ultra Lite -MOLK
- Weight 10.0 oz
- 1.3" ID
- Gen 4
- Mil-Spec Hardcoat Anodize
- 7075 Barrel nut w/ Hardcoat Anodize
- Melonite Finish Hardware
- Free Floating Design
- Slip fit locking mount design
- Billet Anti Rotation Insert
- Anti Slip Design
Muzzle Device: Mil-Spec A2 Flash Hider
Sights: Front and Rear ARMS #71L Polymer Flip Ups
Includes: Hard Plastic Case, Three Okay Industries Surefeed 30rd Mags, SOLGW Sticker & Patch, Trident Concepts TACOST card deck, copy of the US Constitution, and LIFETIME
Sons Of Liberty Gun Works was founded on the principle of producing hard use, purpose built weapons for Americans in 2012. Our company was founded by two lifelong firearms enthusiasts and one US Navy SEAL. We produce a wide range of products including M4 based rifles and Mk10 Rifles, over take on the classic AR-10.
All our products are backed by a LIFETIME Warranty. We can do this because we believe in only providing products that we believe in and would stake our reputation on. Our entire staff has been thoroughly trained by the best armorers in the proper procedures to build and diagnose problems with the M4 platform.
We provide in house custom rifle builds, repairs, cerakote, special order of non AR Platform firearms, training on the AR platform and consulting work. Come by and check us out, our doors are always open and the after hours beers are always cold.