: Six (6) Chip McCormick Power 10 Mags
They have numbers painted on the bottom of the base pad and 5 of the 6 pads were modified (shaved down) to work with the magwell on a SA TRP Operator. Not sure on round count but I've never had a malfunction of any kind with the TRP.
$125 Shipped. Postal MO preferred. Paypal +fees or gift option. FTF is cool too, in the VB area.