Used only once. Purchased for research purposes, pretty neat device.  This is 1/2-28 and is their .223/5.56 option I used on an AR15. These sell new on their site for $140-175 depending on time of year / sale. 

Shoot me a text @ 702-338-2927, feel free to call but leave a voicemail because I will not call you back if you don't. 

This is NOT a suppressor, no FFL required. Totally legal for purchase via private sale. 

*** Out of town until 5/22 but feel free to reach out