I saw in a FB 30sc group that somebody used the magguts +3 for the 10rd 9mm Shield Plus magazines in their 13rd 30sc Plus magazines and got 17rd of capacity. A range trip to test functionality was successful with no malfunctions after 200 rounds were fired. I bought one after I saw the post and also got 17rds of 30sc into the magazine and am looking forward to testing it for myself. That's a pretty potent setup with 17+1 rounds of 30sc HST in such a small footprint when using that smaller magazine.

I saw that on FB also. I think I’ll try some mag guts myself.