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Radical Firearms 300 BLK Pistol RPR M-LOK SBA3 - 10.5"

Manufactured by Radical Firearms
SKU: FP10.5-300HBAR-10RPR-SBA3
MPN: FP10.5-300HBAR-10RPR-SBA3
Manufactured by Radical Firearms
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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 1 business days or less. FFL orders take approximately 10 business days or less if you can provide us an actively receiving FFL location. Due to high demand, there is a limit of 5 FFL items in a 30 day period.

Items that are regulated by the ATF have restrictions and requirements:
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time is approximately 14 to 16 days.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.
•If this firearm includes magazines with a capacity higher than 10 rounds it may not be legal in your state. We will review all order prior to shipping and if your state does not allow the included magazines they will be removed.



The Radical Firearms 300 BLK Pistol has been upgraded for 2019 with the popular SB-Tactical SBA3 5 position adjustable pistol brace. This arm brace is extremely durable and rigid with plenty of adjustment for different arm lengths and features a QD sling swivel slot for carrying or added stability when shooting off hand. It also allows for a proper cheek weld giving you a variety of ways to shoot your AR pistol. This model comes with a 10.5” barrel machined from 4140 Chrome Moly steel with a Melonite finish and the 1:8 twist rate is a good middle ground for shooting lightweight supersonic bullets and heavier subsonic bullets, if you plan on running suppressed. The pistol length gas system is necessary to reliably cycle this cartridge and the M4 feed ramps help to feed each round into the chamber. The Radical Firearms .300 Blackout pistol paired with the SBA3 stabilizing brace make this gun extremely fun at the range.

  • 10.5” barrel chambered in .300 AAC BLK
  • Machined from 4140 steel with Melonite finish
  • Heavy barrel profile
  • 1:8 twist rate
  • Pistol length gas system
  • .750” low profile gas block
  • A2 flash hider
  • Forged 7075-T6 aluminum receivers
  • Type III anodized
  • 10” RPR free float handguard
  • M-LOK compatible
  • Mil-Spec parts kit
  • Ambidextrous safety and billet magazine button
  • Billet extended bolt catch
  • Mission First Tactical Ergo pistol grip
  • SBA3 pistol arm brace

This 300 Blackout pistol features an upper and lower receiver forged out of 7075-T6 aluminum and a type III anodized finish for added durability and corrosion resistance. Even though is a larger caliber than typical AR-15’s, it uses all the same components allowing you to customize the pistol with your favorite aftermarket parts. However, it does come with an ambidextrous safety selector, Mission First Tactical Ergo pistol grip, and a billet machined magazine button. Also included is the Radical Firearms 10” RPR M-LOK handguard. This handguard comes with a few features of its own like an extremely durable barrel nut that free floats the barrel for better accuracy and indexes with the upper receiver to prevent it from rotating loose. It features lightening cuts to reduce weight and a continuous picatinny top rail for iron sights and other accessories. The M-LOK slots allow you to quickly add lights, grips, and rail segments to set up your PDW exactly the way you want.

Radical Firearms offers law enforcement grade hardware. Crafted with quality materials and covered by their lifetime warranty, Radical Firearms is an outstanding choice for any budget.
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Barrel CoatingMelonite
Barrel ContourHBAR
Barrel Length10.5
Barrel LiningMelonite
Barrel Material4140 Chrome Moly Steel
BrandRadical Firearms
Caliber Gauge300 Blackout
Frame SizeAR Pistol
Gas System LengthPistol
Gas System TypeDirect Impingement
Handguard10 in M-LOK Rail
Thread Pattern5/8 X 24
Twist Rate1:8

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

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