Just Google the design you want and go from there. Guy It will be good to at the least manage to receive a fifteen rounder or so. So far as other compatible manufacturers, I would use Mec-Gar also. Must be no challenge finding them. I'm seeking a Ruger Computer carbine https://ruger-shotguns67787.angelinsblog.com/31454934/getting-my-ruger-sr45-for-sale-to-work