Vickers criticized that grip on last night's show. Didn't mention anyone by name though.
Here's a 2012 post on another forum about it:
It's part of the 'Scorpion' shooting stance of whatever it is called that has been the craze in many fanboy circles since the Dynamic Duo ( Haley/Costa) highlighted it to the world in the Magpul videos
It has been way overdone- I happened to work at a relatively minor, little known, borderline insignificant Tier One Special Operations Unit stationed at Ft Bragg for many years and the aggressive arm forward stance was used almost universally- I/we never had issues with getting my arm burned ( I shoot lefty as a primary side) as controlling the gun is more about pulling the muzzle straight to the rear- not putting your hand on top like your trying to choke a Python
Look at how I place my hand on the forearm and if you try it this problem will go away- but of course it may not nearly be as 'Tacticool' to do it my way so factor that in to your decision making process
Just my .02 cents
LAV