Assembling a Lightweight Carbine
I want to assemble a lightweight defensive carbine and would appreciate any input. My requirements are 1x7 twist, ability to cowitness a red dot or holosight, iron sights, and weapon mounted light. Cost is a factor, so marginal weight savings at significant cost probably would be out. To me, this drives it towards the KISS mode.
I can get a good deal on a RRA lower with two-stage trigger and CAR stock, so I’m probably going to use that as a starting point. For a CAR upper, I’m leaning towards either
1. finding a Colt 16” pencil barrel
2. CMMG 14.7 with permanent flash hider
3. RRA CAR A4 upper with a 1x8 stainless barrel, although it would not be a pencil barrel. (Are there pros/cons I should be aware of on a stainless barrel?)
I believe Sabre makes 1x7 uppers but I don’t know if they make a lightweight or are readily available. The Colt would have a carry handle, so I would use gooseneck mount for optics – bad idea or acceptable? Any of the others, I would probably get a flattop with a BUIS.
I see no need for a rail system if I attach a light to the front sight. Good idea or bad idea?
Any further suggestions?