SOLGW M4-89 FCD 5.56 Nato 13.9" Pinned Barrel Rifle

SOLGW M4-89 FCD 13.9" Pinned 5.56 NATO Rifle

The SOLGW M4-89 FCD is a high-performance, duty-ready AR-15 built in collaboration between Sons of Liberty Gun Works (SOLGW) and Forward Controls Design (FCD). Featuring the M89 Drive Lock Rail, an ambidextrous LRF lower receiver, and the proven A5 buffer system, this rifle is built for reliability, durability, and hard use. The 16-inch barrel is constructed from 4150 Chrome Moly Vanadium (CrMoV) steel, ensuring longevity and consistent accuracy, while the mid-length gas system optimizes smooth cycling and recoil control. Whether for defense, duty, or competition, the M4-89 FCD delivers top-tier performance with premium components.

Specifications:

Barrel & Gas System:

• Caliber: 5.56 NATO
• Barrel Length: 13.9"
• Barrel Material: 4150 CrMoV, QPQ Corrosion Resistant Finish
• Twist Rate: 1:7 Six Groove
• Gas System: Mid-Length
• Gas Block: .750” Lo-Pro, Nitride Treated, Knurled Head Set Screws
• Muzzle Device: Nox Muzzle Device (Pinned / Welded)

Upper Receiver & Rail System:

• Receiver Material: 7075-T6 Aluminum Forgings
• Finish: Mil-Spec Hardcoat Anodized, Non-Reflective
• Handguard: SOLGW M89 Drive Lock Rail

Lower Receiver & Fire Control:

• Model: LRF (Lower Receiver, Forward Controls Design w/ Stripes logo)
• Material: 7075-T6 Billet Aluminum
• Trigger: SOLGW Liberty Fighting Trigger (LFT), 5.5lb Pull
• Safety Selector: SOLGW Ambidextrous Selector

Stock & Buffer System:

• Stock: B5 Systems Bravo Stock – Black
• Grip: B5 Systems – Black
• Buffer System: A5 Intermediate Buffer System
• Buffer: A5H2 Buffer
• Spring: Sprinco Green Rifle Length Spring

Additional Features:

• Ambidextrous Right-Side Bolt Release
• QD Mil-Spec Receiver End Plate, Staked Castle Nut
• Engraved T-Marks on Upper Receiver
• No Sights Included

The Sons of Liberty Gunworks M4-89 FCD is built for hard use and uncompromising reliability.