I expected Kel-Tec to start shipping the Charlie version of the SU-22, (the SU-22C as opposed to the SU-22CA that's currently shipping) as soon as the shorter 15 round magazines were available from Black Dog Machining. The shorter magazines have been available to retail customers for a couple of months or more. http://blackdogmachinellc.net/ar15-.22-conversion-full-body-short-15-round-magazine.aspx My shorter magazine works great. It's nothing more than a shorter version of the 27 round magazine that ships with the SU-22CA, so there wasn't really much engineering to it. I wonder when Kel-Tec will ship the SU-22C to distributors so it can be purchased from dealers. I had a Charlie stock left over after I converted my SU-16C to the SU-16E (or CE by some folks reckoning), so it didn't cost me anything to swap the Charlie stock for the Alpha stock. I like the SU-22C configuration. I think it'd be a popular product for Kel-Tec. If I had to guess, I'd say Kel-Tec is selling more SU-22CA rifles than they can produce as it is, and they're trying to do a lot of other stuff like ramp up serious production on the Carbine RFB, so this simple and easy expansion of their product line is less of a priority. If so, that's a pity for many people waiting for the Charlie version of the SU-22.