CARVER Custom M&P .45 ACP +3 extended capacity base pads are CNC machined from aluminum and hard anodized for a long service life. This lengthens the magazine and allows up to 3 rounds(.45 ACP) to your magazine with the factory follower. We provide a regular extra power spring to use with your follower. The unique locking mechanism allows a very solid attachment with a simple backing out of the discrete set screw.
They are specifically designed to work with Tactical and Open mag wells such as the CARVER Custom M&P .45 Magwell or without a magwell. The unique attachment design provides a low profile, sleek design that is very stable and easy to remove. * We include magazine spring and a .050 hex driver that makes installation and removal a breeze. 2.667oz
Great for added rounds when shooting bowling pins or hunting.

Nice Base Pad
Easy install, with new spring & stock follower. I use these with, S&W M&P 14-round mag extentions. (Save that stock [OEM] spring & base pad). Feeds & runs great! No problems....except,...now, I need more. 💸🎱👍