if you have the time to get in a good stance you are probably wrong. You should be moving. However in a perfect world and if you could get in a stance a "fighter" stance is what I use, just like you would be if you were boxing. The stance that mag pul uses has been around for a long time, and they did not re-invent the wheel. The aggressive forward hold is not new in the shooting world, however in the training community is relatively new compared to other things. The forward hold taught by magpul , vtac and others is something that was adapted from the competition world. however in the competition world they would be more likely to use a bladed stance with an aggressive forward hold on the rifle. In the "tactical" world you keep the squared up stance and simply attain a more aggressive forward grip on the rifle.
If done right this aggressive forward grip should look like your support hand when shooting a handgun. 9thumbs forward I mean) which that in itself is an adaptation from the competition world. The Brian Enos/ Letham grip.
I use a "Squared" up stance, and an aggressive forward hold. My shot to shot times are very fast, and with the forward hold you are able to drive the gun from target to target quickly.
If you take the time to try it, and work with it, and apply the theory correctly you will see an advantage and improvement in your speed, and efficiency which leads to better defectiveness. As far as I am concerned I will take any advantage that I can get in a fight. If used properly the ar will recoil straight back into you and not up. You will be amazed at what it can do for you. as an example I used a shot timer to test the theory because like many people I question the validity of pretty much every technique that there is to see if it is for me.
circumstances: target at 5yds 8" circle (this is part of the mag pul bsa drill that can be found on the dvd's) par time 2 sec. From low ready.
1) with a square stance but holding the fore arm as most people are taught, I got 4rds in 2 sec.
2) holding the mag well I was able to get 3rds in 2 sec
3) using the square stance and using an aggressive forward grip I can continually get 7-8rds in 2 sec or less. (obviously I have worked with this technique for a while) your results may not be as different at the beginning.
It is like a red dot as opposed to iron sights. If you can do it with irons you can do it faster with a red dot. If you can achieve a goal without a good stance and grip on the gun, you can do it better, faster, more efficiently and effectively with a that good stance and grip.
Lots of people don't like it from the looks, and they think that it is uncomfortable and they will never even try it. was not getting a good thumbs forward grip on a handgun uncomfortable at first? It was for me and most everyone else I know/ have taught/ trained with etc. However the benefits are apparent once you use it. That thumbs forward grip on the handgun becomes natural and easy to "get into" without any thought very quickly, the same with the stance and the aggressive froward grip on the carbine.