This. ever since they went full retard and stopped selling AR's at Dicks because of Sandy hook, they don't get my money anymore.
You NEVER go full retard.
Glockstore.com has a +1 aluminum mag extension for the G42. might have to pick up a pair.
http://www.glockstore.com/mag-parts-extensions/g42-magazine-extension
after I saw this thread I dropped what I was doing and drove to Ed's and bought one. price was $480 with my GSSF coupon. Came with 3 mags! That's less than I paid for my NIB gen 3 17 I bought from Moss Pawn a few years back.