Sound suppression is only one metric by which suppressors are measured. While the AM & DC suppressors do offer world class decibel reduction they also take into consideration other critical factors such as accuracy point of impact shift weight and flash reduction. – The AM & DC suppressors are made of a lightweight high strength Titanium alloy which is 100% CNC machined and orbital welded to minimize weight without sacrificing durability. The suppressor bore is precision machined for perfect concentricity to ensure rifle accuracy is not compromised and point of impact shift is both minimal and repeatable every time. Last but not least for military and law enforcement customers these suppressors are specifically engineered and tested to eliminate muzzle flasheven in low light environments. The AM30 & AM338 quickly attach to a recoil-reducing Barrett muzzle brake whereas the DC30 & DC338 connect directly to your rifle threads for the ultimate in simplicity. Whichever you choose rest assured that your rounds will be on target when it counts. – Model: AM30 – Caliber: 30 and less – Length: 8.30 – Diameter: 1.50 (50mm) – Weight: .775 lbs (0.35kg) – Sound Reduction: -25-30 dB – Mount: Barrett® Muzzle Brake Adaptor