Finally have all the parts to finish my PSA 16" Glock mag carbine. I got an 8.5 oz heavy Q buffer and need to know if I can get by with using a standard spring with the full length barrel or really need something like a Wolff HP. BCG is the odd looking (to me) PSA hybrid.

Can't wait to try the ETS 31 rounders. I would have gone shorty barrel, but I'm saving my 9mm SBR cherry for marriage to a Scorpion Evo.