This project has been on hold for sometime. I have the lower done but ready to get the upper going.
I’m getting ready to choose the barrel. Would an 18" be better over a 16"? If I go 16" would a BCM enhanced light weight be optimal? My goal is to have it light: 8 to 9 pounds with optic.
will be using a BCM K MR for the rail.
Most 3-gunners run 18 barrels for the rifle gas and the extra velocity to reach without holds/adjustments… you could use a shorter barrel with an adjustable gas block and if tuned right, will be extremely smooth. My 14.5" carbine gas shoots like a 22LR, but it gives up velocity. It’s a carbine, so it’s not a big deal to me.
https://www.m4carbine.net/showthread.php?82447-PLEASE-READ-THIS-FIRST-Custom-Build-AR-Forum
To all concerned.
The custom build area is a place to show off/discuss and ask questions and get feedback about your completed custom build (this means a completed AR that is functional and already completed). If you are going to post pictures of your build, please post a complete picture not just your parts, partial lowers, etc…
Also, buying an upper separate and then a lower and throwing them together does not constitute a custom build. It would be nice if you took time to explain how you came to your decision and explain your set up. Thanks.