What's the most reliable DI set up for a 16" rifle?
In this confusing world of crane o-rings and springs, buffer tubes, springs, weights, m4 feed ramp cuts, carbine, rifle, and mid length gas systems... what's the most reliable combination for a 16" barrel rifle with an evil collapsible stock? Assuming it's been made well and everything is staked correctly etc.
I'm guessing a rifle gas system with bolt upgrades and something like a vltor v5 with rifle like buffer parts would be best?
What if it has to be a mid-length?
Steel cased? suppressor? 5.56 vs .223?
Ok here's a related question, my brother is now building a rifle and is starting with a bcm bfh recce upper with bcm bolt, what should we do for the lower? Can we just get a Vltor A5 kit and leave it? Once again we run steel cased exclusively and will use suppressors.