L9-L89 14.5″ 5.56MM
At L9 MFG 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 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 are meant to be used hard and go in harm’s way, they won’t let you down.
All rifles are test fired twice in the shop to ensure proper function.
The L9-L89 is our premier fighting rifle, featuring a 14.5″ Combat v2 Barrel, A5 buffer system, LFT Trigger, and B5 furniture. At Sons of Liberty Gun Works we always tell our customers, it’s not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications on the M4-89. 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:
Barrel: Sons of Liberty Gun Works 14.5” 4150CrMoV 1:7 MPI HPT Barrel (Pinned & Welded to 16″ OAL)
Caliber: 5.56mm
Barrel Steel: Chrome Moly Vandium
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: Mil-Spec M4 Feed Ramp Extension
High Pressure Tested (HPT)
Magnetic Particle Inspected (MPI)
Lower Receiver: L9 MFg Lower 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
Contour is fully machined leaving no flash marks from the forging.
Lowers are cut with M16 auto pocket.
Safe, Fire, and Full Auto Pictograms.
Buffer System: Enhanced Intermeidate Buffer System
Receiver Extension: 9 Position Loyal 9 Receiver Extension Tube made from 7075-T6 Aluminum
Buffer: Intermediate2 Buffer
Buffer Spring: Sprinco Green Spring
Receiver end plate: Quick Detach End Plate with properly staked Forwards Controls Design Castle Nut
Fire Control Group: Single Stage Liberty Fighting Trigger
Safety Selector: Mil-Spec Ambi Selector
Grip: B5 Systems Grip
Stock: B5 SOPMOD 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: Liberty Charging Handle (Ambi)
Gas Block: Lo-Pro Gas block made from 4140 Steel and Nitride Treated with Knurled Head Set Screws
Gas Tube: Mid Length Melonited Stainless Steel
Rail System: 13.76″ Sons of Liberty Gun Works L89 Drive Lock Rail system.
Weight: 15 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: Titanium
Free Floating Design
Grade 8 Fasteners
Anti Rotation- Anti Slip Design
Includes Steel QD MLOK
Continuous top rail design
Mil-Spec 1913 Mounting rails
Muzzle Device: NOX 9 Port 5.56
Sights: None, Optics Ready
Includes: Tactical Soft Case, One Steel M-LOK QD Socket, Three Steel 30rd Mag, 2oz Bottle of S.P.E.C. 76 Lubricant, Sticker & Patch, copy of the US Constitution, and LIFETIME Warranty Certificate