Constructed of stainless steel or titanium, Daniel SoundGuard Powered by KGM Suppressor 1.375-24 HUB direct-thread adapters are available in in A 1/2 - 28" and 5/8 - 24" TPI and provide rock-solid mounting and rapid attachment/detachment. They utilize a non-proprietary flat wrench (included) that attaches or removes the adapter to the suppressor tube or an appropriately threaded firearm muzzle in seconds-no additional or special tools necessary! Because no mounting adapters or other mounting hardware is required, these direct-thread adapters allow the suppressors to be conveniently and easily switched from one firearm to another compatible-caliber firearm with an appropriately threaded muzzle. Just remember to ALWAYS CHECK-AND DOUBLE-CHECK-FOR PROPER ALIGNMENT BEFORE FIRING when installing SoundGuard-or any-suppressors to a firearm.Features:Provides rock-solid direct-thread mounting and attachment/detachment in seconds with included flat wrenchUtilizes industry-standard HUB 375-24 UNS, enabling SoundGuard suppressors to be conveniently switched from one firearm to another compatible-caliber firearm with an appropriately threaded muzzleNo proprietary tools, adapters, or other mounting hardware requiredCompatible with SG-30SG-30 = .223 Rem > 300 PRC