Voted BEST OF SHOT 2019 by RECOIL Magazine the Maxim Defense PDX was born from the SOCOM PDW solicitation to meet the demands of the Tier 1 community. - Designed for close-quarter encounters the PDX delivers maximum energy on target in a subcompact platform measuring just 18.75 in overall length. - At its core the PDX features the Maxim SCW system a patent-pending design that reduces the stock length to 4 and includes an integrated BCG with interchangeable buffer weights for optimal performance. Equipped with Maxims HATEBRAKE muzzle booster the PDX significantly reduces recoil decreases flash signature and directs gases and concussion wave downrange enhancing overall performance. - Caliber : 5.56 NATO - Barrel Length: 5.5 inches - Thread Pitch: 1/2x28 - Weight: 5lbs 11oz - Overall Length: 18.75 inches - Material Composition: 6Al-4V titanium 17-4 stainless steel 7075 and 6061 aluminum - Finish: Hard anodizing - Stock/Brace Options: Maxim SCW Pistol System