Caliber: .338 Lapua - Weight: 27.6 oz - Length: 11.125 - Mount: 5.8-24 2B or 3/4-24 2B - Sound Reduction: 35 dB - Diameter: 1.875 in - Materials: Titanium / Aluminum - Finish: High-Temp. Cerakote - Reaper-QD for .338 Lapua comes with either a direct thread mount or QD mount setup. - For barrels: 24