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Sons of Liberty Gun Works

Mk10 Ultra Lite Rifle .308 (Lead Time 8-12 weeks)

$ 2,199.00

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

Mk10 Ultra Lite

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 Mk10 Ultra Lite is our light weight .308 patrol rifle, weighing in at only 7lbs 15 ozs unloaded it is one of the lightest LR308 based rifles on the market. 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.

Bolt Carrier Group: Sons of Liberty Gun Works Marked  LMT Enhanced Bolt Carrier Group MPI
Bolt: precision machined from Aramet 100 alloy
Extractors machined from 4340 Steel.
Extractor Retaining Pin: precision machined and ground S7 Tool Steel, heat treated per ASTM A681-08, shot peened per mil-spec print, manganese phosphate
Dual Extractor Springs Extractor Spring 
Ejector: S7 Tool Steel
Ejector Spring: heat treated, stress relieved, Molybdenum-Disulfide infused, cryogenic processed (all post winding)
Gas Rings:standard stainless steel X3
Carrier:  hard chrome bore plated, precision ground gas key interface, Sons of Liberty Battle Flag logo laser engraved, hard chrome finish.
Gas Key: machined from 4130 chromoly steel alloy heat treated, hard chrome internal, manganese phosphate, Grade 8 Hex cap screws torqued and staked all per mil-spec
Cam Pin: precision machined 4340 chromoly steel alloy, heat treated/processed per mil-spec, manganese phosphate, solid film lubricant applied and cured per mil-spec
Firing Pin: precision machined 8640 steel alloy, heat treated/processed per mil-spec, hard chrome plate


Barrel: Sons of Liberty Gun Works 16” 4150CoMOV 1:10 MPI HPT Barrel
Caliber: .308 Winchester Chamber
Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)
Twist Rate: 1/10 Twist Six Groove
Thread Pitch: 5/8x24 Threaded Muzzle
Gas Block: .750″ Gas Block Journal with appropriately sized gas port
Weight: 29oz
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 Billet 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.
Safe, Fire, and Full Auto Pictograms
Angry Patriot Roll Mark

Buffer System: Vltor A5 Buffer System designed to improve reliability while creating a smoother operating cycle.
Receiver Extension: Vltor A5 7 Position Receiver Extension Tube made from 7075-T6 Aluminum
Buffer: Mil-Spec Quality H2 Buffer 
Buffer Spring: Sprinco Orange Rifle Length Spring
Receiver end plate: QD End Plate

Fire Control Group: ALG Quality Mil Spec Trigger
The ALG Defense Quality Mil-Spec (QMS) Trigger is designed for those shooters where tradition, value and regulatory concerns are of primary importance. The pull of the QMS is very similar to a standard mil-spec trigger, however the majority of the associated grittiness of the stock trigger pull has been removed while the well known reliability of a stock trigger remains. The pull weight is not lower than the M4/M16 minimum weight specification of 5.5lbs.

Safety Selector:
Sons of Liberty Gun Works Selector

Grip: MAGPUL MIAD AR-10 Grip – Black

Stock: MFT BattleLink Lightweight - Black

Upper Receiver:
Material: 7075-T6 aluminum 
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

Charging Handle: Vltor Gunfighter Mod 4 7.62

Gas Block: Sons of Liberty Lo-Pro Gas block made from 4140 Steel and Nitride Treated

Gas Tube: Sons of Liberty Mid Length Melonited Stainless Steel

Rail System: Sons of Liberty Gun Works SOLO Ultralite  MLOK Rail system.

14.87" Exact Top rail length
15" Ultra Lite .308
DPMS LOW receiver height
1.5" ID
Gen 4 
Mil-Spec Hardcoat Anodize
7075 Barrel nut w/ Hardcoat Anodize
Melonite Finish Hardware
Free Floating Design
Slip fit locking mount design
Billet Anti Rotation Insert
Anti Slip Design

Muzzle Device: A2 Flash Hider

Sights: Front and Rear ARMS #71L

Accessories: Hard Plastic Case and one 10RD and one 25RD PMAG

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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