The Chesty .300 is Mustang Armament's core duty build in .300 Blackout, set up to run suppressed or unsuppressed. Billet 7075-T6 receivers, a 10.5" cold hammer forged 41V50 barrel on pistol-length gas, a Geissele SD-3G trigger, and Radian ambi controls. Built to order in your choice of finish.
Specifications
- Manufacturer: Mustang Armament, Fredericksburg, Virginia
- Model: Chesty .300
- Caliber: .300 AAC Blackout, 5/8x24 thread
- Barrel Length: 10.5", pistol-length gas
- Receivers: Mustang 7075-T6 billet upper and lower
- Barrel: Mustang Duty Precision Taper, cold hammer forged 41V50, nitride, nickel boron barrel extension
- BCG: DLC-coated 4140PH, enhanced anti-tilt, HPT/MPI tested, shot-peened
- Trigger: Geissele Super Dynamic 3-Gun
- Controls: Radian Raptor LT ambi charging handle, Radian Talon ambi safety, Radian bolt catch, Battle Arms takedown pins and mag release
- Grip: Driven Arms Full Size
- Foregrip: Emissary Development Accelerator, Emissary rail panels and covers
- Recoil System: JP Enterprises Silent Captured Spring, JP-SPEC seven-position receiver extension
- End Plate: PWS ratcheting castle nut and end plate with QD sling point
- Muzzle Device: Rearden R2S (Plan B compatible)
- Finish: Camo (Black, Bronze, Tungsten, OD Green), Tiger Stripe (Black, Bronze, Tungsten, OD Green), Damascus (Black, Bronze, Tungsten), Distressed (Bronze, FDE, Grey), or Battleworn (Bronze, FDE, Grey)
Price shown is for Camo, Tiger Stripe, and Damascus finishes. Distressed Cerakote adds $140 and Battleworn Cerakote adds $210.
- Firearm Type:
- Rifle
- Product Type:
- Rifle
- Platform:
- AR-15
- Caliber:
- .300 BLK
- Model:
- Chesty
- Barrel Length:
- 10.5"
- Action:
- Semi-Auto
This is a firearm. Federal law requires us to ship it to a licensed FFL dealer near you — not directly to your home address. Here's how it works:
- Add to cart and check out. At checkout, use our FFL dealer locator to pick a licensed dealer near you. If your preferred dealer isn't listed, check the box to enter their address manually.
- We verify the FFL and ship. Your dealer can email a copy of their license to support@reactivegunworks.com to speed things up.
- Pick up at your dealer. They'll contact you when it arrives. Bring your ID, fill out the ATF Form 4473, pass the background check/any other requirements relevant to where you live, and the firearm is yours.
Local to Fruitland, Idaho? Select in-store pickup at Reactive and schedule an appointment to visit us.
