Need some opinions/ advice from some of you "gun hands"

As far as the 22lr CMMG conversion and 22lr bolt they work great.
But 3 points
1 22lr is dirty
2 5.56 is a larger diameter
3 the rifling is 1-7, 1-8, 1-9 (unless you have a old SP1 Colt thst is 1-12
22lr really needs, 1-16 twist.
Most everyone that has bought the adapter I know of ends up doing one of 2 things.
1 buying or building a dedicated 22lr upper or whole gun with a real 22lr barrel
That's why if you look CMMG sells the beer is with barrel and colarand barrel, collar and bolt. Since a lot if guys already have the bolt from the conversion, and are doing a real 22lr.
dediacted 22lr upper with 22lr barrel is more accurate and keeps the dirty 22lr away from the 5.56 upper.
The upper with 5.56 uses a gas block and tube.
The 22lr does not and is blow back.
Also the buffer and spring should have a plug over the spring - buffer when shooting 22lr so the lower does not get beat up.
Quite a few brands out there.
Pressure Plug for AR15-22LR | Taccom3g