The only large frame AR’s I have any experience with are a LW barreled Larue OBR and a LMT MWS. The Larue was an accurate rifle but we would get a lot of popped primers and stuck cases on longer strings of fire. ML didn’t want to address the issue so that rifle was sold rather quickly with full disclosure. I bought a used MWS last fall. Shooting 168gr FGMM I shot 15 5 shot groups and it averaged roughly MOA with the cl barrel. 15 5 shot groups from an 18” SS barrel has averaged roughly .75 MOA also with 168 gr FGMM. I say roughly because I don’t have the on target software. The SS barrel is more consistent as it heats up than the CL.

I know its not a high round count but I’ve shot about 300 FGMM, almost 500 168 gr magtec, and a couple hundred or so hand loads. So far no stuck cases or any other malfunctions. POI shift when swapping barrels has been consistent. 1.5 moa elevation and 1 moa windage. I did this 3x just for kicks to see if it was repeatable.

The only gripe I have is that the p-mags and Lancers I have don’t drop free.

I’m a big boy, the weight doesn’t bother me.

If you’re patient, ~$2k will get you a used MWS.