I looked around and didn't see it posted up here yet but CDNN is selling the CMGG stainless 22lr conversion kits with an extra magazine (2 total) for $189.99. Best deal I've seen especially for stainless. These should be a ton smoother than the parkerized ones, and if they aren't...you can polish them. Plus they give you a pair of free range glasses and swiss army knife. Shipping is about 8 bucks and you can order as much as you want and shipping doesn't go up. Here's the link:
http://www.cdnninvestments.com/ar22stcokitw.html
http://www.cdnninvestments.com/ar22stcokitw.html