I recently converted my G22 to 9mm, and its as easy as pie. The barrel brands I explored we're Lone Wolf (LW), Storm Lake (SL) and KKM.
Based on my reading here at Glock Talk about conversions, these brands all work well. The LW is less expensive. The SL and KM are more expensive but seem to be finished to a slightly higher standard. LW and SL are often available on eBay, but I don't know about KKM. All three can be bought directly from the manufacturer.
A conversion barrel and 9mm mags complete the changeover. At least thats all I was advised to do. Many folks here have done the conversions, and they seem very satisfied with performance. I haven't fired mine yet, but it sure looks good with the stainless barrel in a black frame. Go for it!
Last edited by PhotoFeller; 10-11-2012 at 04:10..