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Sons of Liberty Gun Works

M4 Patrol Rifle with Free Float ERGO Z Rail, QD End Plate, LFT CUSTOMIZABLE CS01

$ 1,299.00 $ 1,049.00 -31%
or

Need more details? Call us at (210) 400-5992

M4 ERGO Z Patrol Rifle

Key Features:

FREE FLOATING Quad Rail
Carbine or Mid Gas System 
Easily built as an SBR patrol rifle in 10.5,11.5, 12.5 or 14.5 configurations
QD End Plate for Single Point Slings 
Liberty Fighting Trigger with Consistent 6lb pull and quick reset
Come with Three USGI magazines

ASK about Department contract pricing and LEO discounts!

This rifle very closely resembles the Military issue M4 but with an Free Floating ERGO Z Rail and a Liberty Fighting trigger.  Everything you need in a patrol rifle and nothing you don't.  Our only rifle to come with a vertical grip standard, it is ready to go right out of the case.

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 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

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
Weight: 25 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 Taper Pinned Front Sight Block

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:Mil -Spec Buffer System
Receiver Extension: 6 Position Mil-Spec Receiver Extension Tube made from 7075-T6 Aluminum
Buffer: 3.1oz H Buffer
Buffer Spring: Sprinco White Spring
Receiver end plate:Quick Detach End Plate with properly staked Castle Nut

Trigger Guard: B5 Winter Trigger Guard

Fire Control Group: Liberty Fighting Trigger

The SOLGW Bolt Catch and Safety Selector are a Mil-Spec AISI8620 investment casting per the USGI TDP. (not to be confused with MIM parts in the commercial market)

Our Safety and Takedown Pivot Detents are solid hardened Stainless Steel from KNS  Precision Machine.

SOLGW Magazine catch and Takedown Pivot Pins are machine from Mil-Spec AISI8620 per the USGI TDP, heat treated and coated per mil spec.

Our Mag Buttons are made from steel per Mil-Spec versus the aluminum found in the majority of commercially available LPKs on the market.

Grip: A2 Mil-Spec Plastic Grip

Stock: M4 Mil Spec Plastic Stock with Sling Swivel

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: GI Charging Handle

Gas Block: Sons of Liberty "F" marked Front Sight Block made from 4140 Steel and Nitride Treated

Gas Tube: Sons of Liberty Standard Carbine Length Melonited Stainless Steel

Hand Guard: ERGO Carbine Length Free Floating Z Rail

Muzzle Device: Standard A2 Flash Hider

Sights: Rear Magpul MBUS Sight Black
Front: "F" Marked Front Sight Block

Accessories: Hard Plastic Case, Three Okay Industries Surefeed 30rd Mags, SOLGW Sticker & Patch, Trident Concepts TACOST card deck, copy of the US Constitution, and LIFETIME Warranty Certificate. 

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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.

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