The Charlie Atlas provides a mount interface for suppressors using Charlie threads, like the SilencerCo Saker, Omega 36M, Hybrid 46M or Chimera 300.Features :Threads: Charlie (SiCo Charlie thread pitch)Material: 17-4 PH H900Compatible with short Rearden devices (FHD, Mini, SPB, RPB, R2S)Compatible with Q Cherry Bomb and Other Plan B Compatible Muzzle DevicesHeat Treat Finish