I've done some searching but most are for carbine or midlength upper combos
I plan on installing a Magpul UBR Gen 2 stock on the following
Stripped M&P lower with Daniel Defense internals except the trigger was replaced with a Geissele SSE flat bow.
The Upper runs a Faxon 18 gunners barrel rifle length gas tube primarily suppressed Silencer co SpecWar K
Current Stock runs a LaRue Supplied Carbine Spring with and H3 buffer, No issues runs my reloads 69 SMK over 25 grains CFE suppressed or not
Should I Run the the same Combo with the included Magpul supplied spacer
Or would I be better off to run a Tubbs rifle length spring with What Buffer to Start?
The UBR can use either.
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