As noted on another post, I am building a carbine with a flat top and FF hand guard.
I am planning a CT verticle front grip with laser/light combo and I am planning to add a Holographic to the flat top. Might switch out the A2 gas block/sight for a YH gas block and rail style pop up iron sights.
The CT grip uses the 123 batteries. Gonna switch out the stock for a MagPul or similar stock for the extra batterie storage.
Thats is why I am curious about the Eotech's that use the 123 batteries.