The Ultradyne Apollo S provides competition level recoil reduction and muzzle control. By using a scientific approach and studying thousands of recoil events, Ultradyne engineers have struck a balance between extreme recoil reduction and less aggressive venting of gas without sacrificing the elimination of muzzle rise. The Apollo S is perfect for shooters who want drastic recoil reduction with less perceived blast. Like all Ultradyne muzzle devices, a timing nut is included for easy installation.FeaturesExtreme Recoil ReductionVirtually Eliminates Muzzle RiseManages Sonic BlastPairs easily with the Dynamount Sighting System Note: 22 Caliber rated for the standard cartridges in the following calibers: 223 Rem, 5.56 x 45 NATO, 224 Valkyrie, 224 Weatherby Mag, 22-250 Rem, 222 Rem Mag, 222 Rem, 22 Nosler, 220 Swift, 22 PPC, 22 BR, 22 Hornet, 204 Ruger, 218 Bee. 6.5mm Rated for the standard cartridges in the following calibers: 6.5 Creedmoor, 6.5 Grendal, 6mm Rem, 6mm BR, 25-06 Rem, 257...