The SOLGW V2 CHF barrels remain appropriately gassed for use with or without a suppressor of your choosing. This Cold Hammer Forged version is a good match for shooters who frequently get their carbines hot, and are looking for a highly durable barrel. The SOLGW V2 CHF profile was designed with our customers’ needs in mind, delivering increased accuracy while balancing suppressed handling and performance. With the significantly increased chamber support, SOLGW barrels are better suited for modern configurations where lights, lasers and suppressors all add to a commonly muzzle heavy carbine. The transfer of material to the rear of the barrel helps to offset the weight of accessories, and stiffens the barrel at the same time – reducing POI shifts between suppressed and unsuppressed use. The gas journal length has been shortened as well to optimized weight distribution, so please note that fixed front sight bases will not fit on this barrel, only low profile gas blocks. HIGHLIGHTS: SOLGW 13.9” HPT/MPI V2 CHF Barrel SOLGW 13.75″ L89 Free Float M-LOK Drive Lock Handguard Mid-Length Gas System HUXWRX Flash Hider-QD 556 1/2×28 XL (Pin and Welded – compatible with HUXWRX cans) B5 SYSTEMS SOPMOD 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 Sons of Liberty Gun Works M4-L89 was designed to be Ultimate Fighting Rifle. It features their new L89 Drive Lock Rail (7 sided M-LOK slots, internal QD sling swivel socket built in to the rear of the handguard), Liberty Fighting Trigger and the Vltor A5 buffer system. SOLGW has nothing to hide with their quality builds. This rifle comes with a HUXWRX muzzle device and is pinned and welded to make it a non NFA rifle, bringing it to a 16″ OAL. Barrel: Sons of Liberty Gun Works 13.9” HPT/MPI V2 CHF Barrel (pinned to 16″) Caliber: 5.56 NATO Chamber 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 Material: Made from Mil-Spec 7075-T6 aluminum forgings Finish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodize 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: SpringCo 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. Safety Selector: SOLGW Quick Q Ambi Safety Grip: B5 Systems Grip – Black Stock: B5 Systems Sopmod Stock – Black Upper Receiver: 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 L89 Drive Lock Weight: 13 OZ Muzzle Device: HUXWRX flash hider (pinned and welded) Sights: No sights included Includes: Allen TacticalSoft Case, Three 30rd Mags, SOLGW Sticker & Patch, copy of the US Constitution and LIFETIME Warranty Certificate Only available at your Sons of Liberty Gunworks Premier Dealer Idaho Arms & Ammo 519 E. Fairview Ave. Ste. 300 Meridian, ID 83642