Hi Lindsey and welcome. This is a single stack model, and you can use the full sized 10rd magazine but it will extend slightly below the grip: budsgunshop.com/product_info.php/products_id/35329/rock+island+armory+magazine+.22+tcm+9mm+.38+super+10+round -------------------------------------- Cheers, stay safe and enjoy!

Here ya go, problem solved 😁
budsgunshop.com/product_info.php/products_id/35329/rock+island+armory+magazine+.22+tcm9mm+.38+super+10+round

Try here: budsgunshop.com/product_info.php/products_id/35329/rock+island+armory+magazine+.22+tcm+9mm+.38+super+10+round

The single stack Rock Island Armory ROCK Ultra CS-L Combo 9MM / 22TCM9R can use any 1911 single stack magazine for caliber. You can get them with ten rounds but the magazine will extend paste the grip by at least a half inch. The magazine you probably want is the ---- budsgunshop.com/product_info.php/products_id/35329/rock+island+armory+magazine+.22+tcm+9mm+.38+super+10+round -----
Happy shooting

Hi Lindsey, for more capacity, the only option is the 10rd magazine, which will extend below the grip slightly budsgunshop.com/product_info.php/products_id/35329/rock+island+armory+magazine+.22+tcm+9mm+.38+super+10+round ,
Stay safe & have a great day!

Good afternoon to you!! The Rock Island Armory ROCK Ultra CS-L Combo 9MM / 22TCM9R is a single stack firearm. You can utilize the 10 round full size magazines but they will extend somewhat past the grip (about half an inch-3/4"). Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸
budsgunshop.com/product_info.php/products_id/35329/rock+island+armory+magazine+.22+tcm+9mm+.38+super+10+round