Just came home from the range after putting the first 100 rounds through a Ciener .22lr conversion kit in my Bushy M4.

I am still grinning like an idiot.

This thing is loads of fun. I only had one bobble, a double feed, and other than that it ran fine.

Shooting the .22lr in a full size / full weight carbine is a lot of fun. No recoil, quiet report, quite accurate.

The only drawback to the thing is that the bolt does not lock to the rear after the last shot.

Other than that, a hoot.