Quoted:
My question, then, is whether or not a Magpul CTR stock is, indeed, compatible with the LAR-8...
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For those of you wondering whether or not the Magpul CTR stock, with a 1/2 inch cheek riser installed, is compatible with the LAR-8, I can tell you that it absolutely is. My LAR-8 has a commercial buffer tube. I have an AR-15 with a Magpul CTR stock also on a commercial buffer tube, so I traded out the stocks to see if the Magpul CTR,
with the cheek riser installed, would work on the LAR-8 and
it absolutely does. The drawback is that the only way you can fully extract the charging handle is if the stock is fully extracted to it's maximum (farthest back) position (which, fortunately for me, is right where I need it to be).
I now have the perfect setup for my physical frame/build in order to settle in and get proper cheek weld, eye relief and reasonable comfort, without strain. Does this void the warranty? I'm guessing it does, but only RRA can tell me that. I'm willing to take my chances, though. Perhaps after I zero the system I'll come back and report on anything of significance, but I know that there are several forums where topics have addressed this issue (mostly regarding the Magpul PRS stock, but I found this to be a decent compromise with virtually no hassle).
Anyway, I hope someone finds this information useful.
R3v0