Les Baer says his ar15 Grendel cannot handle a suppressor?

[dega37]

Personally, I would take Les Baer's advice if he is one who manufactured your rifle; at least until he tells you why. I had a failure recently which rendered my rifle unserviceable on one of his barrels and extentions with a suppressor. I still don't know how it happened, but I lost my bolt and my barrel will have to be inspected and recut and is still sitting in a box. But i will say this, there is more to extending or reducing the dwell/unlocking time and bcg speed than just the gas block when using a suppressor. On my new barrel I changed my earlier adjustable block with a superlative, and even with the bleed off all the way open and JP's heavy silent capture spring and heaviest spring, my bolt still doesn't fail to eject - however it does feel a lot smoother and I did turn it back a click or two for reliable lock back and feeding. Also I hadn't heard about an adjustable gas key until LR just mentioned it and that is also an interesting idea.