Silencero Pistons are constructed from 17-4 stainless steel and heat treated for maximum durability. They easily interchangeable for compatibility with all relevant host guns and can be changed out to be compatible with sub-caliber host guns, which means you can shoot smaller caliber rounds through the same suppressor, making it a multi-caliber silencer. This model has 13.5x1 lHM XL threads and is compatible with: Octane Series; Osprey Series; Omega K Series; Hybrid 46.