Well, I think I'm going to try to build a lightweight upper. Not super lightweight, just a little lighter than the PSA upper I currently have: (16 inch barrel, F-marked front sight, A2 flash hider, carbine length gas tube with Magpul MOE SL handguard).
So, I recently ordered an Anderson slick side upper receiver.
Ballistic Advantage is my first choice for barrel but might be out of price range for this build so was considering alternatives. RightToBear has an Anderson barrel that got decent reviews.
https://www.righttobear.com/Anderson...m-04-16lwt.htm
Barrels is pencil barrel, I've never had one before and am concerned about accuracy loss when it warms up.
Next, I have to find an affordable handguard. I like the Aero Atlas S-One I have on my other rifle but again, might be too much for this build, need something similar, light, affordable, m-lok.
Update: I just discovered MAS Defense so I'm going to check out their barrels/products as well.
Input ? Suggestions?