Quote Originally Posted by KellyTTE View Post
They should rotate a bit, that's normal.

Anti-Rotation pins save wear and tear on lowers in high stress applications (full-auto, 9mm, etc) but are harder on the hammer/trigger/disconnector. Its a trade off in the big scheme of things. I use them because lowers receivers are harder/more expensive to get than internals. Even then, they're generally not needed.
That's why I'm still gonna go with the anti rotate pins. They are cheap, the lower reciever isn't. no, it's not going to see full auto use, but it will see many many thousands of rounds. Thanks again!