Thread Pitch 1/2-28 – Modularity MODULAR- Replaceable Core with End Cap – Mounting Direct Thread Titanium Thread Mount – Materials 100% Machined 7075-T6 Alum. and 6Al-4V Ti. – Features Built in Self Cleaning Carbon Cutters – Sound Reduction 114 db w/sub-sonic 135 db w/super sonic – Finish Hard Coat Anodizing – Weight 3.5 oz – Length 5.9 inches – Diameter 1 inch – Calibers 22LR 22WMR 17HMR – Rate of Fire 22LR- Full Auto 17 HMR & 22 WMR – Semi Auto only