Previously asked questions:
Is tension the same on both sides
Yes; by adjusting the screw in the middle, it either adds to subtracts tension from the magazine draw.
Does it hold single stack or double stack magazines?
The Bianchi Triple Threat Magazine Pouch holds either single or double stack magazines, depending on the weapon you choose from the drop down menu. Select the desired finish from the drop down menu, then click on "Gun Type" and you will be able to scroll through the available weapon magazine fits to find your weapon.
Can it hold S&W M&P 9mm magazines?
Yes; select the S&W M&P 40 from the drop down menu and use the tension adjustment screw to get the correct fit.