The Swamp Fox
Highlights:Ultra Lite at only 3lbs. 13oz.
MBUS Pro Back Up Sights
14.7" Lightweight Profile Barrel
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-SULML is our lightest upper yet weighing in at under 4lbs.! 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-SULML. We have built our guns to run through years of hard use, and we have nothing to hide.
Bolt Carrier Group: Can be added as an option, please refer to the BCG item listing for specs.
Barrel: Sons of Liberty Gun Works 14.7” 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: 19 Ounces
Barrel Finish: QPQ Corrosion Resistant Finish
Barrel Extension: QPQ coated M4 Feed Ramp Extension
High Pressure (proof) Tested (HPT)
Magnetic Particle Inspected (MPI)
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 Ultra Light MLOK Rail system.
Weight: 10.5 OZ
Inside Diameter: 1.3" ID
Finish: Mil-Spec Type III Class 2 Hard Coat Anodizing per Mil-Spec Mil-Spec MIL-A-8625F
Barrel Nut: 7075 Barrel nut w/ Hard Coat Anodizing
Free Floating Design
Grade 8 Fasteners
Titanium Anti Slip plate
Anti Rotation- Anti Slip Design
No Special Tools Need for Barrel Nut
Continuous top rail design
Mil-Spec 1913 Mounting rails
Muzzle Device: SLR Synergy Brake or Compensator Pinned and Welded
Sights: Front and Rear MAGPUL MBUS Pro (Offsets substituted upon request)
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.