Sons Of Liberty Gun Works M4-89 6.5 Grendel AR-15 Rifle - Pinned Dead Air KeyMo Flash Hider - 13.9"

SKU: M4-89-MATCH-6.5G-13.9
MPN: M4-89-MATCH-6.5G-13.9
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Standard orders will ship out in 1 business days or less if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



Sons of Liberty Gun works is committed to making high-quality parts and firearms, and they stand by their products for a lifetime, which is why each of them comes with a lifetime warranty from manufacturing defects. This AR rifle is an awesome way to get into the 6.5 Grendel platform with a firearm that’s meant to last you for a lifetime of hard use.

  • 13.9” Barreled Upper Receiver
  • 7075-T6 Upper
  • Pinned Dead Air KeyMo Flash Hider
  • Combat Grade Barrel
  • Threaded Barrel
  • Included A2 Flash Hider
  • Lower includes B5 Systems stock, B5 Systems Pistol Grip, and one Magazine
If you’re looking for an awesome 6.5 Grendel rifle build, this is one worth looking at. This has a high-quality receiver, including an ejection port cover, forward assist, and an integral Picatinny rail that extends the length of the handguard. The front sight block is low profile, meaning that this will be an optics-ready option. This is a complete package, that comes with everything but an optic and ammo. With that in mind, this is an excellent rifle in 6.5 Grendel: all you need is an optic, and you’d be ready to go to the range or to defend yourself.
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Barrel Coating
Barrel Length13.9
BrandSons of Liberty Gun Works
Caliber Gauge6.5 Grendel
Magazine Capacity30
Muzzle DeviceDead Air Flash Hider - Pinned and Welded
Thread Pattern1/2 X 28
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

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