Sons of Liberty Gun Works M4-76 Upper 556 16″ Barrel W/ Midlength Gas

M4-76-16

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 our premier fighting rifle, featuring a 16″ combat grade barrel, A5 buffer system, Liberty Fighting Trigger, and B5 furniture. 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 M4-76. 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:

https://sonsoflibertygunworks.com/collections/components/products/solgw-bolt-carrier-group-158-carpenter-sp-hpt-mpi?variant=3084070593

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
Barrel Finish: QPQ Corrosion Resistant Finish
Barrel Extension: QPQ coated M4 Feed Ramp Extension
High Pressure (proof) Tested (HPT)
Magnetic Particle Inspected (MPI)

Buffer System: Enhanced A5 Buffer System
Receiver Extension: 9 Position Loyal 9 Receiver Extension Tube made from 7075-T6 Aluminum
Buffer: A5H2 Buffer
Buffer Spring: Sprinco Green Spring
Receiver end plate: Quick Detach End Plate with properly staked Forwards Controls Design Castle Nut

Fire Control Group: Liberty Fighting Trigger 6- 6.5lb

Safety Selector: Sons of Liberty Gun Works Ambi Selector

Grip: B5 P23 Grip

Stock: B5 Bravo Stock Black

Upper Receiver:
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
T-Marks: Engraved T-Marks

Charging Handle: Raptor-LT Black

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 Mid Length Melonited Stainless Steel

Rail System: 15″ Sons of Liberty Gun Works M76 Wedge Lock Rail system.
Weight: 12 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: Steel with QPQ Finish
Free Floating Design
Grade 8 Fasteners
Anti Rotation- Anti Slip Design
No Special Tools Need for Barrel Nut
Continuous top rail design
Mil-Spec 1913 Mounting rails

Muzzle Device: A2 Flash Hider

Sights: None, Optics Ready