Good picks man! I think you'll be happy with it. I just got a reliabolt bcg for $135 all NiB coated. I'll find the link if you're interested. I was originally going to get a bcm as well, but found this one instead. Be aware that a lighter grain round shot in a 1:7 barrel has the potential of overspin. This barrel twist is more meant to handle a heavier grain. Have fun and be safe! I'll click follow.
RE: My first Ar15 build