its 1 1/4" tube would require a tube sleeve, and modified valve front end to hold a puncture pin and sleeve. I doubt that Crosman will put the tooling time into it.
A few years ago I built a long tube QB78 carbine, and while doing it added the extra things needed to continue using 12g's if necessary. The punch line, I never used a 12g powerlet in that gun since. Now I build all my rifles dedicated bulk fill.
For the most part, when my other 1/2 and I go away for extended weekends I fit all of her, and my gear, three rifles, three pistols, a Chrony,two 20 oz co2 tanks, ammo & small tools..all in the back of a 07' 350Z coupe.