Just sell the TSO and buy a czechmate and then sell the cmore/mount. There?s more than just buying a threaded barrel and adding a comp to make your TSO an open gun.
You have to cut by about 1 1/4? off of the TSO dust cover to make that happen. If you decide to do that, you need to relocate the serial number of the TSO frame because it will be impacted when you cut the dust cover. You also will need a reverse plug to connect to the barrel.
This is just some what it entails if you want do it right. Or you can do it your way and just put a threaded barrel with a comp at its end.
Check out kneelingatlas posts in the Brian Enos forum about converting TS/TSO?s into open guns.
I kept my TSO and bought a CM and be done with it. Less headache.
Here?s the link to knellingatlas? thread:
https://forums.brianenos.com/topic/268074-tactical-sports-to-czechmate-conversion/