Sons of Liberty Gun Works M4-76 5.56 NATO AR-15 Rifle - 13.7"

SKU: M4-76-13.7
MPN: M4-76-13.7
2 Reviews

In Stock

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OREGON CUSTOMERS: We are very sorry; Due to high holiday volume and unreliable shipping from the carriers, we are unable to ship this item in time for Measure 114.
The SOLGW M4-76 is a great entry level Complete AR-15 rifle that comes with all the features you want for a reliable, do-it-all carbine built for duty. This model features a 13.7” barrel machined from 4150 chrome moly vanadium steel and QPQ Nitride finished inside and out. Attached to the end of the barrel is a pinned and welded NOX 3 prong flash hider to get the overall length to 16 inches. The six groove 1/7 twist rate is optimal for heavy 62 grain 5.56 NATO surplus ammunition. The Mid-length gas system and appropriate gas port size ensures reliable function under any conditions and minimal recoil. The government profile barrel and gas system are protected by the M4-76 free float handguard with M-LOK slots for full customization potential.

  • 13.7” 5.56 NATO barrel
  • Pinned and welded NOX flash hider
  • Dead Air Sandman Keymount suppressor compatible
  • 4150 chrome moly vanadium steel
  • HPT and MPI
  • QPQ Nitride finish
  • 1/7 twist rate
  • Mid-Length gas system
  • 4140 steel .750” gas block
  • M4-76 M-LOK free float handguard
  • 1/2x28 threaded
  • 7075-T6 aluminum Cerra forged receivers
  • Angry Patriot lower receiver
  • Type III Class 2 hardcoat anodized black
  • SOLGW Ambi charging handle
  • Liberty Fighting Nickel Boron trigger
  • A5 buffer system
  • B5 Systems stock and pistol grip
  • T-Marked upper
  • Dry film lube bolt carrier channel

The M4-76 handguard features 45Β° M-LOK slots at the front for more light and accessory mounting options. The upper receiver is made from 7075-T6 aluminum Cerra forgings and type III class 2 hardcoat anodized black. The upper receiver comes with the forward assist and dust cover assembled as well as an SOLGW BCG and ambidextrous charging handle. The inside of the receiver has a dry film lube applied to decrease friction with the bolt carrier for smooth function.

The lower receiver is decked out with aftermarket furniture like the B5 Systems carbine stock and pistol grip for better ergonomics than standard Mil-Spec equipment. It utilizes the A5 carbine buffer system for optimal reliability and low recoil when combined with the mid-length gas system. It also features the Angry Patriot lower receiver engraving.
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Barrel CoatingSalt Bath Nitride
Barrel ContourGovernment
Barrel Length13.7
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandSons of Liberty Gun Works
Caliber Gauge5.56 NATO
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Magazine Capacity30
Muzzle DeviceSOLGW NOX Flash Hider
Thread Pattern1/2 X 28
Twist Rate1:7
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

2 reviews

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Table top inspection- WOW

by -

This is my holly grail rifle. The quality, fit and finish speaks for its self. I'm very impressed with the rifle. I chose SOLGW over BCM and DD. Best of all and added bonus it is, Made in Texas! Came with some goodies too. SOLGW Spec 76 gun oil, 3 SOLGW mags, copy of the US Constitution, SOLGW Sticker, SOLGW Patch, test fire case, Lifetime Warranty certificate and a paded rifle bag. As soon as I got home with the rifle it was cleaned white glove style and I will say the attention to detail is fantastic. I can't wait to get to the range. I looked high and low and Primary Arms had it in stock. I have never bought a firearm on the inter webs until now. bought on a Monday and arrived on Friday. Super fast shipping and outstanding costumer service from PA.

This is my Holy Grail!

by -

FOLLOW UP REVIEW! I did a 600 round run and gun and I am more then impressed with this M4-76. It is very flat shooting which allows for faster follow up shots. The trigger is awesome for a Nickel Boron coated Mil-spec trigger. Almost no take up with a 6# break. Constant ejection pattern to the 2 to 3 o'clock position. The Rifle had no issues of any kind. The three steel mags that come with this Rifle are awesome and work great. I also ran some Magpul, Hex Mags, and SureFeed with zero issues. I ran a multitute of different ammo through it ranging from Federal M856 64 gr, Federal M855 GT 62gr, IMI GT 62gr, IMI FMJ 55 gr, Hornady Frontier FMJ 55 gr, PMC X-tac GT 62gr, and Fiocchi 223 55gr FMJ. I don't use steel case ammo so I can't tell ya what its like. All ammunition was brass and ran through great. If you see it available, BUY IT!!! SOLGW picks the best parts to make this M4-76 and is ready for any situation.