Backup Tactical 223Rem 1/2 x 28 Right Hand Frag Thread Protector Black. The patented Back-Up Tactical Frag Thread Protector is one of the most durable thread protectors on the market today. It's easy to use and requires Backup Tactical's Thread Sealant or Low Friction Seals. The backup thread protector also protects from the heat generated from the case when shooting handgun ammo. Backup Tactical thread protectors should be used in all handgun ammo that uses a 1/2x28 thread. Backup Tactical backup thread protectors also do not need Backup Tactical's patented W Refined Thread Technology. Backup Tactical's Backup Tactical Frag Thread Protectors utilize an anti-torque device with a hex wrench located on the inside of the thread protector. Back-up thread protectors should not be used in conjunction with high frequency 223 Remington or other rapid fire ammo without Backup Tactical's special thread protector or adapter. Specifications for Backup Tactical 223Rem 1/2 x 28 Right Hand Frag Thread Protector: Manufacturer: Backup Tactical Color: Black Package Contents: Backup Tactical 223Rem 1/2 x 28 Right Hand Frag Thread Protector Backup Tactical BACKFRAG-BLK223: 223Rem 1/2 x 28 Right Hand Frag Thread Protector Black