I bought a bunch of Glock mag extensions and base plates on Ebay. They were poorly described by the seller. He said they were all for G30. The Pearce was marked as "PG-26", which is clearly for a G26. I'm curious about the Glock OEM extension that was in the bunch. Is there any way to ID it so I can be sure it is for a G30? Here are some pix. Thanks for the help.