Thread Pitch 5/8-24 – Modularity MODULAR- Replaceable Core and End Cap; Serialized Thread Mount – Mounting Direct Thread Aluminum Mount w/Titanium Thread Insert – Materials 100% Machined 7075 Aluminum Gr-5 Ti thread insert. – Features Built in Self Cleaning Carbon Cutters – Sound Reduction 20 Barrel 308 Win 133 db – Finish Hard Coat Anodizing – Weight 13.7 oz – Length 8 inches – Diameter 2 inches – Calibers .30 caliber cartridges up to 300 Win. Mag. – Rate of Fire Controlled 1 round every one second for up to 20 rounds. Then cool to ambient temperature