Purchased an Aero upper. This one:
https://www.opticsplanet.com/aero-p...luted-complete-upper-receiver-w-atl.html

Hand guard is compatible with a low profile gas block, .750.

This is a fun gun, nothing serious. Was planning on building to learn about the platform, but the parts were more expensive then the assembled upper on sale. Will shoot it first, then start tinkering. Thinking adjustable gas block looks like an interesting place to start.

Looked at the Seekins Precision and Odin Works on Optics planet. Major issue seems to be ease of adjustment.

Any recommendations appreciated.
Thanks,
Peter

"What I was saying is if my kin folk 400 years ago had guns, we wouldn�t be having this conversation. I�m in favor of guns and encourage everyone I know to have them because the last time we didn�t have them we were abused.�
Rep.Mitchell.