The M4-EXO2 is our newest entry level upper packed with great features. The Sons of Liberty EXO2 MLOK rail is the best on the market at its price point, it looks great and locks up rock solid. Built with the same high quality components that have given us our reputation for guns that never stop running, you can't beat it at this price.
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: 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)
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: Sons of Liberty Lo-Pro Gas block made from 4140 Steel and Nitride Treated
Gas Tube: Sons of Liberty Melonited Stainless Steel
Rail System: SOLGW EXO MLOK
Weight: 12.9oz in 15"
MLOK Slots at 3,6,9 O'Clock
Continuous top rail at 12 OClock
Muzzle Device: Mil-Spec A2 Flash Hider
Sights: Front and Rear ARMS #71L Flip Up Polymer Sights