The manufacturers designed the firearm to specified specs, which includes price and potential sales. I am certain they considered "for the average" shooter in those specs. That does not mean that they couldn't design the firearm to hold +1 or +2. It probably meant they would have to increase the cost and potentially have a negative effect on sales.

With that said, I believe that there are improvements that can be made to the design of just about anything made. The fact that a third party decides to improve the design doesn't necessarily make it bad or risky. I am sure there are people that push the mods beyond the margin of safety, but I do not believe this is the case with the magguts.

Like others have said before me...we should go with what we feel comfortable and/or are willing to accept (or not). Just saying...