We just got word that the LWRC M6A3 is on the chopping block but right behind it is the new LWRC M6A5.  From the early info we have gathered so far, the M6A5 has a 2 position gas regulator and that is the only difference.  Not sure about any other changes but I think this was just a simplicity issue.   There is nothing wrong with simplifying a design because some gun parts and accessories can wear out or be hard to place or are just a wast of manufacturing time and energy because it is not necessary.   We have seen LWRC stop the M6 rifle because it was just so old and the demand for something more on a carbine was there.

I still have my original LWRC M6A1 carbine and I love it although it isn’t the same guy it was when I first purchased it.   The thing about the AR15 upper receivers that I have held and shot, is that there are so many configurations and variations out there that sometimes the guns are just flat out not the same.   The AR18 is also know where near the same as an LWRC gun nor is it like the Sig 556.   There are differences between rifle grips and some are mil spec and some are commercial