Les Baer says his ar15 Grendel cannot handle a suppressor?

[saturn]

I have 3 GEMTECH cans. The biggest one "The One", works on everything up to 300 WinMag. Have run it on an AUG, 308 DPMS, 300 SAUM DPMS, R15, 7.62x39 AR, 300 BO AR, 300 winmag R1, Kimber 6.5 CM, LWRC 223 (piston) ---- it just works, no adjusting anything. Can't imagine anything unique about a LB Grendel. IMHO it's CYA or "not invented here" at work. My AA Grendel upper arrives soon and will get this can strapped on immediately. Somehow I think it will work just fine.