Just bought one of these Ruger LC 45ACP carbines that use Glock 21 magazines. Does anyone know of a way to store an extra mag or two on the gun? I have found butt stock pouches for the regular PC carbine and for my Beretta storm carbine, but coming up dry so far with the PC Carbine.

Or maybe a sling mount of some sort to have a pouch attached to a sling?

Magpul has a stock for the 9- maybe they will for this one. I can’t remember if it holds one mag or two…..

I don't know of any made for the LC45.

If you don't mind it flopping and sliding around, any mag pouch with belt loops could be attached to the sling. Definitely not ideal, but an option.

Otherwise, consider a pistol/PCC magazine bandoleer or chest rig that you just keep stored next to the LC45.

It looks like Specter Gear has two versions for the Ruger PC Carbine. One for the standard fixed stock and one specifically for the Magpul CTR collapsible stock - both with adjustable straps. Seems like one of those could be made to work. Otherwise you could swap to the Magpul CTR stock and you’d be good to go.

https://www.spectergear.com/SearchResults.asp?Cat=240