the first was so bad why buy the second, and if both the first and second were so bad why buy the third?
I didn't buy any of them. They were given to me, along with ammo and a load of magazines, for testing purposes. I wanted to like the CMMG .22s because they have the same exact weight and balance as a real M4, but they performed so poorly that we shelved them.
The S&W M&P-15 22, despite being plastic, lighter, and balanced differently, performed very well and have seen about 5,000rnds each, with just a few cursory cleanings and few problems.