Guntec Spitfire Muzzle Comp Features The Guntec USA Spitfire Muzzle Comp is machined from steel and finished in nitride for corrosion resistance and a durable low-maintenance surface. Its 2.5 inch overall length and 1.5 inch outer diameter keep the profile compact which matters on a short AR pistol where every inch of rail space and barrel length counts. Threaded 5/8x24 for .300 AAC Blackout and .308 caliber platforms the comp is designed to control muzzle rise and distribute gas efficiently during rapid fire. The quick-detach blast shield threads directly over the muzzle comp adding a physical barrier between the shooter s support hand and the concussive blast generated at the muzzle. Designed and manufactured in Scottsdale Arizona the Spitfire system is purpose-built for AR pistols fired without a stock where close proximity to the muzzle makes blast and concussion a real concern. Combined the muzzlebrake and blast shield weigh 9.5 ounces a modest addition that does not meaningfully affect handling or balance. The QD design on the blast shield means it can be removed or reinstalled without additional tools once properly indexed onto the comp. For shooters running a .300 AAC Blackout or .308 caliber AR pistol who want reduced felt concussion in tight spaces the Guntec USA Spitfire Muzzle Comp and Blast Shield is available for sale at GrabAGun. Guntec Spitfire Muzzle Comp Specifications Manufacturer: GunTec Model: Spitfire Muzzle Comp Caliber: .300 AAC Blackout / .308 Win Material: Steel Finish: Nitride Thread Pitch: 5/8x24 Length: 2.5 Outer Diameter: 1.5 Weight: 9.5 oz Available At: GrabAGun