GrovTec Muzzle Thread Protector - You've got a lot invested in those delicate threads on the end of your muzzle, why let them get damaged when you don't have a suppressor or other device on your barrel? With the Muzzle Thread Protector from GrovTec on the end or your barrel, not only are your muzzle threads safe from damage, but it gives yrou gun a more finished look when no muzzle device is installed. Knurled exterior on the GrovTec Muzzle Thread Protector gives you a firm grasp to install or remove the protector in seconds.