SOLGW Liberty Series M4-89-LRF-13.7 Rifle

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SOLGW Liberty Series M4-89-LRF-13.7 Rifle

$1,995.00

LRF (Lower Receiver, Forward Controls Design) is a collaboration between Sons of Liberty Gunworks (SOLGW) and Forward Controls Design (FCD). Machined from a solid block of 7075 aluminum, LRF is an ambidextrous AR15 lower receiver with built-in right side bolt release, designed to use our EMR-A (Enhanced Magazine Release, Ambidextrous), a Norgon Ambi-Catch will also work on the LRF.

  • Sons of Liberty Gun Works / Forward control Designs LRF
  • 13.7″ 4150CRMOV BARREL with a NOX pinned and welded to make it a non-NFA rifle with a >16″ OAL
  • M89 DRIVE LOCK RAIL
  • B5 SYSTEMS BRAVO STOCK

The Sons of Liberty Gun Works M4-89 was designed to be Ultimate Fighting Rifle. It features their new M89 Drive Lock Rail, Liberty Fighting Trigger and the Vltor A5 buffer system. SOLGW has nothing to hide with their quality builds. This rifle comes with a NOX muzzle device and is pinned and welded to make it a non NFA rifle, bringing it to a 16″ OAL.

2 in stock

SKU: M4-89-LRF-13.7 Category:

HIGHLIGHTS:

  • Sons of Liberty Gun Works / Forward control Designs LRF
  • 13.7″ 4150CRMOV BARREL with a NOX pinned and welded to make it a non-NFA rifle with a >16″ OAL
  • M89 DRIVE LOCK RAIL
  • B5 SYSTEMS BRAVO 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 M4-89 was designed to be Ultimate Fighting Rifle. It features their new M89 Drive Lock Rail, Liberty Fighting Trigger and the Vltor A5 buffer system. SOLGW has nothing to hide with their quality builds. This rifle comes with a NOX 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 13.7” 4150CoMOV 1:7 MPI HPT Barrel (pinned to 16″
  • 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 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 / Forward control Designs LRF

  • Material: Made from Mil-Spec 7075-T6 aluminum
  • 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

Buffer System: A5 Buffer System with BCM T2 Buffer

  • Receiver Extension: 9 Position Loyal 9 A5
  • Receiver Extension Tube made from 7075-T6 Aluminum
  • Buffer: BCM T2 Buffer
  • Buffer Spring: Sprinco Green Spring
  • Receiver end plate: Quick Detach End Plate with properly staked Forwards Controls Design Castle Nut
  • Fire Control Group: Liberty Fighting Trigger
  • Safety Selector: Milspec
  • Grip: B5 Grip
  • Trigger Guard:  Aluminum Enhanced Trigger Guard
  • Stock: SOPMOD Bravo
Design of LRF was completed in 2019.  Due to difficulties of Covid-19 induced lockdowns and subsequent buying frenzies of all things firearms related, production was continuously delayed.  Neither SOLGW nor FCD are known to rush development or production, we had used this time to further refine the LRF.
LRF was designed with duty and defense users in mind. Its changes from TDP based lowers are based on ergonomics and better protection of magazine releases (both left and right side):
  • EMR-A (Enhanced Magazine Release, Ambidextrous) fence on the left side.
  • Taller than TDP spec magazine release fence on the right side to ensure TDP spec magazine release button stays below the fence.
  • Countersink take down pin hole on the left, when the user pushes the take down pin in from the left side, the pin can be pushed in further, with more protrusion on the right to pull from.
  • Built in trigger guard with the same features as our TGF (Trigger guard, Forward Controls), more info: https://www.forwardcontrolsdesign.com/TGF-Trigger-Guard-Forward-Controls_p_178.html  TGF has more usable space forward of the trigger, not behind.  It also has a “ramp” to facilitate magazine loading for users that use the rear spline of the magazine to index and “rock” the magazine into the mag well.
  • Flared magazine well with a larger opening.
LRF’s changes are subtle and wholly functions based, a duty/defense firearm doesn’t concern itself with aesthetics, nor benefit from them.  One will not find it decorated with lightening cuts/holes, or obnoxiously large logos.  Neither SOLGW nor FCD follow fads.
A tastefully small Cygnus is engraved on the right side of the LRF magazine well to denote FCD’s involvement in the project’s development, one can easily miss or overlook it, and that’s the point, we don’t intend the LRF to be a walking billboard.  It’s designed and made for work, not for show.

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 M89 Drive Lock
  • Weight: 13 OZ
  • Muzzle Device: SOLGW NOX (pinned and welded)
  • Sights: No sights included

Includes: Allen TacticalSoft Case, Three 30rd Mags, SOLGW Sticker & Patch, copy of the US Constitution, Steel M-LOK QD Socket and LIFETIME Warranty Certificate

What is the Drive Lock System?
The Drive Lock System is a Patent-Pending design based on a Hodge defense Extrusion that uses a system of wedges that interface with the barrel nut and “drive” it towards the upper receiver as it is tightened. This system clamps on to the barrel nut with extreme force and precision, providing an extremely robust mounting platform.

SOLGW M89 vs L89

What’s the Difference between the M89 and L89?

While both handguards use the patent-pending Drive Lock System, there are a few notable differences that may lead someone to choosing one over the other:

  • The most noticeable difference is the M-LOK Slots. The L89 features 7 sided M-LOK slots, whereas the M89 retains more substantial cutouts for cooling around the handguard, reducing the quantity of M-LOK slots
  • The L89 has an internal QD sling swivel socket built in to the rear of the handguard, whereas the M89 must use an M-LOK QD sling swivel socket
  • The L89 features a titanium barrel nut, which is going to save a good amount of weight compared to the steel barrel nut in the M89 handguard

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