IN the process of building an SBR using a 10.5 inch barrel with a carbine gas system and a gas port in the .070 to .073 range. Would like to also use an A5 set up on this but unsure which Sprinco spring to use and buffer weight. On my middy I used the green spring and a VLTOR 5.3 oz buffer but not sure which one to use with this set up. I'm guessing the green will be fine for this application as well but wondering about buffer weight too. TIA!
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