And yet you still should have contacted Aero and Brownells for a solution. Which of course you did not. For future reference.

https://www.m4carbine.net/showthread...sion-Statement

4) Contact The Manufacturer or Dealer First – Internet forums have a large global audience and unsubstantiated or ill-informed comments will affect the livelihoods of a lot of hard working people in the industry. If you have an issue with a manufacturer or dealer that you would like to resolve, we ask that your first contact them to resolve it.

Quote Originally Posted by Lallop View Post
A little follow up for anyone interested;

filed down a little portion of the highlighted zone in the upper, the edit except for the finish stripped out is basically invisible to the eye, seems to have worked good and now mag (tried only p mags) drop free & dont lock in anymore.

not happy to have been forced to touch the non defective part, but at least now things seems to work good.