At the heart of the PDX™ is our newly developed Maxim SCW™ brace system. This patent-pending system cuts down the length of the brace to 4”. The integrated BCG with interchangeable buffer weights gives you maximum performance and versatility without sacrificing form and functionality. The PDX uses a Direct Impingement system. The PDX™ is also equipped with newly invented Maxim HATEBRAKE™ muzzle booster. This patent-pending device significantly reduces recoil, decreases the flash signature, pushes gasses and concussion wave downrange away from the operator and improves overall performance in short barrel pistols and rifles. SPECIFICATIONS:Calibers: 7.62x39mmBarrel Length: 5.5”Colors: Black Overall Length: 18.75”Weight (empty): 5 lbs 11 ozMuzzle device: Maxim Defense HATEBRAKE™ muzzle boosterStock: Maxim Defense SCW™ brace systemTrigger: ALG Combat Trigger (ACT) Magazines: Each PDX ships with one 20rd magazine