4150CRMOV BARREL with a NOX pinned and welded to make it a non-NFA rifle with a >16″ OAL
M76 WEDGE LOCK RAIL
B5 SYSTEMS BRAVO STOCK
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 M4-76 is the newest addition to the Liberty Series, featuring our brand new M76 Wedge Lock Rail. The M76 features a Steel Barrel nut and rock solid Wedge Lock locking system. The M4-76 also features our Liberty Fighting Trigger, and awesome Vltor A5 buffer system, for the Ultimate Fighting Rifle. 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-SL. 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 13.7” 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 an 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 – Receiver design will vary
Material: Made from Mil-Spec 7075-T6 aluminum 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.
Buffer System: Intermediate (A5) Buffer System designed to improve reliability while creating a smoother operating cycle.
Receiver Extension: Intermediate Receiver Extension Tube made from 7075-T6 Aluminum
Buffer: A5H2 Buffer
Buffer Spring: Sprinco Green Rifle Length Spring
Receiver end plate: QD Mil-Spec with properly staked Castle Nut
Fire Control Group: Sons of Liberty Gun Works Liberty Fighting Trigger (LFT) with consistent 5.5lb pull.
Sons of Liberty Gun Works Quick 50 Degree Safety
Grip: B5 Systems Grip – Black
Stock: B5 Systems Bravo Stock – Black
Material: Made from Mil-Spec 7075-T6 aluminum 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:Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodic Coating, Flat Black Dye, Non-Reflective, NiAc Seal
T-Marks: Engraved T-Marks
Gas Block: Sons of Liberty Lo-Pro Gas block made from 4140 Steel and Nitride Treated with Knurled Head Set Screws
Gas Tube: Sons of Liberty Standard Mid Length Melonited Stainless Steel
Rail System: Sons of Liberty Gun Works M76 Wedge Lock
Weight: 13 OZ
Muzzle Device: SOLGW NOX
Sights: No sights included
Includes: Allen TacticalSoft Case, Three SOLGW 30rd Mags, SOLGW Sticker & Patch, copy of the US Constitution, Steel M-LOK QD Socket and LIFETIME Warranty Certificate
brandonachacoso-0634 (verified owner) –
This is my main squeeze, if you’re on the fence, you will not regret it. 3500 rounds in and still shoots sub moa with Norma tactical 55gr.
drain_jacob (verified owner) –
Picked up the OD one and finish looks awesome, wish it had the thicker m89 rail. This has a slim rail, but still phenomenal weapon and tight tolerances.
kadesno (verified owner) –
Great fit and finish, I got one in FDE and love it. Thanks again BTO for the great service!
Justin (verified owner) –
Phenomenal firearm from an amazing company