Dead Air Suppressor Adapter HUB Socket Silencer to P-Series Adapter 1212131. This accessory included with the Dead Air Primal is designed to handle most rifle and pistol calibers with ease. Featuring 1.375-24 outside threads for HUB silencers and 1.203-28 inside threads for P-Series accessories like booster assemblies 3-lug mounts and fixed mounts this adapter ensures seamless compatibility. Crafted from durable 4140 HT alloy steel with a QPQ black nitride finish it provides reliable performance and longevity for your suppressor system. Specifications for Dead Air Silencers Dead Air Suppressor Adapter: Manufacturer: Dead Air Silencers Color: Black Nitride Length: 0.545 in Gun Make: Universal Features of Dead Air Silencers Dead Air Suppressor Adapter: Converts HUB-equipped silencers to accept P-Series adapters Compatible with Dead Air Primal and other HUB silencers 1.375-24 outside threads for HUB silencers 1.203-28 inside threads for P-Series accessories Supports booster assemblies 3-lug mounts and fixed mounts Made from 4140 HT alloy steel for durability QPQ black nitride finish for corrosion resistance Overall length: 0.545 inches Weight: 0.88 oz Designed for use with most rifle and pistol calibers Package Contents: Dead Air Silencers Dead Air Suppressor Adapter