Mec-Gar P18 38S Base Plate Extension

I've always wanted base bigger base plates for my RIA 51679, but certain companies that provide them are wishy washy on if they will fit this particular magwell.  Plus they are expensive.  This one fits the magwell and adds no additional capacity as the floor follower keeps the spring in the same spot as OEM on the Mec-Gar P18 38S mag bodies mine came with.  I've found it best to print the body with the aft upper chamfer down.  You can use an xacto knife to slice off the tiny ears that remain if you wish.  Printing aft side down works too, but it doesn't look as nice after you take the supports off.  The most critical feature is the rail interface with the mag body so you want to keep that section somewhat perpendicular to the build plate of your printer.