I bought an extended mag for my 45 ACP Springfield XDM the construction of the magazine is very nice but the springs are underpowered will not feed way underpowered I make it one rechamber that's it springs AR 2 week not a very good product I bought three of them is there any way to buy stronger spring I am not happy with this product border said that it was shipped but it wasn't they made a label and let it sit at the shop made excuses contacted mail carrier mail carrier said that the label was made but never shipped to them waiting on the product very bad experience money was refunded for for shipping I have the magazines and can't even use them I'd like to get stronger springs because I like the concept that's larger capacity