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Is the gas block.adjustable?
RM400-16B-TRD - What is the twist rate? Does this has a rifle gas system?
What are the specs on the barrel (metal spec, twist, etc.). Micro Lite gas block? Is this package from Sig, or aftermarket??
What is not from Sig Sauer on this? Also have there been any complaints on the free float rail that’s on it?
Is the Sig Sauer M400/516 lower receiver compatible with a PWS MK111 MOD 2-M upper receiver ?
Can i switch this upper out on my SIG M400? It currently is chambered fro 223/556.