Looking at putting together an AR .22. Turn a 556 into .22 with conversion kit like below:

CMMG .22 LR AR-15 Conversion Kit

Or buy a dedicated .22 upper? Conversion kit seems to get good reviews across PSA and Primary arms.

That's an interesting idea. Dedicated upper is obviously easier since trajectory and sighting in the calibers. 223 vs 22lr will likely have different POI. If they are close then it would be good. CMMG is a great company and I trust what they make.

I'll trade you a PSA lower w/ CMMG .22LR upper for your 300BO pistol, assuming you still have it...

How do you think I'm funding a new build? She gone.

This was recently covered here:

https://texags.com/forums/34/topics/3139878


Here was my thoughts on the conversion kit:

The cons to using a caliber conversion are only issues depending on you expectations.

The main issue with using a conversion is the twist rate of your 5.56 barrel is not optimal for 22LR. Typical for 22LR is 1 in 15 or 1 in 16. So the precision of the shot group out of your 1 in 7 to 1 in 9 AR barrel will not be nearly as good as with a Ruger 10/22 or M&P 15-22.

The second issue is that shooting a lot of 22LR will really foul up you gas system, so i would highly recommend ending each session with shooting some .223/5.56 to drive full power gas through the system. This swap is not a big deal but a bit of a nuisance at the range.

So all that to say, I do own a conversion kit but it's been collecting dust for years. I personally prefer dedicated rifle for the caliber as the end results are better.

Damn. Probably for the best, that thing was haunting my dreams and my wallet.

Ah, somehow missed that thread.

All good things to consider. Thanks.