.22lr conversion kit consensus?

[M&P15OR]

CDNN is where I got mine also for $149.00 also for the stainless kit .

[shadow65]

The cheap CMMG kits you guys are seeing are the old, discontinued kits. don't confuse them with the new, Evolution kits.
Most of the "reliability" issues you are having have been addressed in the Evolution kit.
I always recommend stainless. Smoother, easier to clean and stays clean longer. It's also stronger steel.
A lot of problems that happen, especially with the parkerized kits, is when the unit is taken apart, which is not recommended, the rails get bent. All sorts of problems are the result.

The older kits are cheaper. Just be aware of what you are getting.
Dave N