Caliber: .338 Lapua Sound Reduction: 35 dB QD - 32dB DT Length: 11.375'' with no adapter parts or with QD parts, 11.75'' with direct thread parts Diameter: 1.875'' QD - 1.5'' DT Materials: Titanium/Aluminum Mount: 5/8 24 2B thread & 3/4 24 2B Includes: (1) .338 Lapua Suppressor (1) Selected Mount