TexasCHLforum.com

It's also not an AR

The staking on the gas key on many of the BMs that I have seen have been poorly done or not at all. The High pressure testing and magnet particle inspection of the upper receiver and barrel is random and non-consistent. Things like M-4 feed ramps, true 556 chambers, No 158 steel, M-16 BCGs, are consistently not present on DPMS, Del-Ton, BM and other brands.

I think LAR is associated with bushmaster - LMT is it's own separate company Afaik. S&W it's right in between the "top tier" and the "other" category in my mind. "Other" being guns from BM, DPMS, RRA, etc. They are decent but lacking or limited in the above features.

S&W is the only brand I can recommend of those listed.