Seekins Precision SBR8 300 Blackout

Seekins Precision SBR8 300 Blackout

Black, 30rd, 8" Threaded Barrel, No Sights

Stock# SEE0011300041 UPC 811452027688
Seekins Precision

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Availability: In Stock


The SBR8 is designed for use with a suppressor (not included). It is configured to keep the overall length to approximately that of a standard carbine by the use of a short barrel and the Seekins Precision MCSR MLOK hand guard. This allows the hand guard to cover part of the suppressor, protecting the shooter from suppressor and letting the shooter use a comfortable support grip further forward on the hand guard.

The SBR8 uses the iRMT-R Upper Receiver and SP223 Ambi Billet Lower Receiver. Both are CNC Machined from 7075-T6 billet aluminum. The iRMT-R Upper Receiver’s hand guard mount is machined into the upper to strengthen the receiver and maintain accuracy throughout long shot strings. Seekins’ SP223 lower receiver is machined from 7075-T6 billet aluminum, has an ambidextrous bolt release and selector switch, as well as the Seekins Precision Billet Mag Release button to make weapon manipulation smooth and quick, even in adverse conditions. The beveled mag well assists with rapid, positive magazine changes. Coupled with the receiver is the Seekins Precision 12” MCSR MLOK hand guard for use with a suppressor. The length allows for a forward hold or closer to the receiver for CQB situations. Both receiver and hand guard are Type III Hardcoat Anodized matte black.

An 8” Seekins Precision match barrel with the pistol length gas system is perfect for this suppressed configuration. Our barrels are all inspected four times to insure match grade tolerances for maximum accuracy and performance. Chambered in .300 Blackout with 5/8x24 threading.

Tuning the gas system is critical to maximize performance and reliability. The SBR8 comes with the Seekins Precision Adjustable Gas Block, Pistol Length Gas Tube and M16 Bolt Carrier Group to fine the gas system for smoother cycling and operation. All are Melonite coated to resist corrosion and wear. This also aids in easier cleaning, as carbon build up will not adhere to the non-reflective coated surface as much as it does on standard parkerized finishes.

Other upgraded features included are the Seekins Precision Trigger Group, an Mag Pul MOE+ grip and the Magpul STR butt stock.


  • STOCK: Magpul STR
  • GRIP: MOE Plus
  • SELECTOR :Ambi
  • BCG:Std melonite M16 .300 blackout
  • LOWER: SP223 Billet Ambi Lower
  • GAS BLOCK: Adjustable
  • GAS TUBE: Melonited
  • BARREL: 8" SS Match Grade
  • MUZZLE DEVICE: Suppressor ready
  • Overall Length: 28.25"
  • Barrel Length: 8"
  • Handguard Length: 12"

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