Hi Andrew and welcome. No firearm specified my man. As long as the pistol is a double stack full size with a lower capacity magazine, this will fit no issue. Most makers make lower capacity magazines so their firearms can be sold in capacity restricted states. Single stack full sized pistols will not accept full sized double stack magazines. Cheers and stay safe!

Good morning Andrew, please repost your question with a specific firearm/model.

Hi Andrew and welcome. No pistol specified my man. Just repost with the model or item number. As long as the pistol is a full-sized double stack model, the magazine is full sized double stacked for that model, it will work no issue. Cheers, stay safe and enjoy!

No pistol specified, please re-post with name/model number. Thank you.