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.
The Patrol Upper Magpul SL is our entry level carbine build. 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 Patrol Upper. We have built our guns to run through years of hard use, and we have nothing to hide.
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: 29 Ounces
Barrel Finish: QPQ Corrosion Resistant Finish
Barrel Extension: QPQ coated M4 Feed Ramp Extension
High Pressure (proof) Tested (HPT)
Magnetic Particle Inspected (MPI)
With "F" marked Front Sight Block
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: "F" marked steel Front Sight Block, taper pinned to barrel per milspec.
Gas Tube: Sons of Liberty Standard Mid Length Melonited
Handguard: Magpul MOE SL, Mid-length, Available in Black, FDE, Gray, or OD Green
Muzzle Device: Mil-Spec A2 Flash Hider
Sights: Rear Magpul MBUS, matching handguard color.
Sons Of Liberty Gun Works is a custom rifle manufacturer in the US. This company was built 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 accessories, and Mk10 Rifles, an overtake on the classic AR-10.
We Guarantee Our Products
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 and repairs as well as cerakote gun coating, special orders of non-AR Platform firearms and training on the AR platform. We also do consulting work. Come by and check us out, our doors are always open and the after-hours beers are always cold.