[6Sally5]

Great (or not) to see others have the same problem as me with trying to get those last two rounds in. Thought I was being a puss having to use my wife’s Ulaloader, but there was no way my old thumb joint was going to be able to push in that 13th! BTW…how do you remive the baseplate on the mags? There’s no YT video I can find that shows…except for the gen 1 Shields.

 

[WingMan71]

... BTW…how do you remove the baseplate on the mags? There’s no YT video I can find that shows…except for the gen 1 Shields.

Page 35 of the Instruction Manual shows how to remove the base plate from a 13-round mag. Step 1 says to just slide the baseplate off of the bottom of the magazine while holding the floor plate catch down!

Well, that's not easily done! There is a hell of a lot of spring pressure pushing on that plate and I can never get it started to slide off with just my fingers.

I have had to resort to sticking the blade of a small flat-blade screwdriver into the seam where the baseplate separates (on both sides of the floor plate catch) and twist the blade a bit to get the baseplate to start sliding off. (The seam between the baseplate and the bottom of the mag shown in figure 72, the arrow pointing at the control spring. That seam when the baseplate is still in it's fully installed position is where to put the screwdriver blade.)

Use a small thin-blade screwdriver and be gentle with your twisting motion. You're prying on plastic. Once you get the base plate just barely started to slide off with the screwdriver you will be able to pull it the rest of the way off with your fingers. And, don't forget to keep your thumb holding the floor plate catch down. Once the baseplate comes off the spring is gonna shoot out of there hard if you're not holding it.

PS) 10-round mags are different. They have a button to push on the bottom to get the baseplate off.

*BTW, you really should have the Instruction Manual for your firearm. If you don't have one for your M&P, go on S&Ws web site and click on "Support" then "Owner's Manuals" to download one.

 

[Jason Freeland]

I've managed to get all my mags (10) to fill up all 13 rounds, by either leaving them loaded or taking them apart and fiddling with the springs. It took a while, but they did break in.

 

[6Sally5]

Page 35 of the Instruction Manual shows how to remove the base plate from a 13-round mag. Step 1 says to just slide the baseplate off of the bottom of the magazine while holding the floor plate catch down!

View attachment 18823

Well, that's not easily done! There is a hell of a lot of spring pressure pushing on that plate and I can never get it started to slide off with just my fingers.

I have had to resort to sticking the blade of a small flat-blade screwdriver into the seam where the baseplate separates (on both sides of the floor plate catch) and twist the blade a bit to get the baseplate to start sliding off. (The seam between the baseplate and the bottom of the mag shown in figure 72, the arrow pointing at the control spring. That seam when the baseplate is still in it's fully installed position is where to put the screwdriver blade.)

Use a small thin-blade screwdriver and be gentle with your twisting motion. You're prying on plastic. Once you get the base plate just barely started to slide off with the screwdriver you will be able to pull it the rest of the way off with your fingers. And, don't forget to keep your thumb holding the floor plate catch down. Once the baseplate comes off the spring is gonna shoot out of there hard if you're not holding it.

PS) 10-round mags are different. They have a button to push on the bottom to get the baseplate off.

*BTW, you really should have the Instruction Manual for your firearm. If you don't have one for your M&P, go on S&Ws web site and click on "Support" then "Owner's Manuals" to download one.

Thanks much! I tried…a bit to work that button, then thought…if it’s this damn difficult, I’m probably doing something wrong and/or it’s going to be a ***** to get back together.