I would like to use these...
https://www.hkparts.net/shop/p...te-Red-137p18303.htm

to differentiate 4 magazines for range use with subs.

How do you remove the bloody magazine floor plate to install these?

Thanks in advance for any advice.

I believe it's the 2 horizontal tabs sticking thru body on both front and back of mag. Push together, and drop the base plate.

What preten2b said...if they're stiff, flat tip screwdrivers help greatly.