I'm putting up with them for right now as I've been way more concerned with getting the m16 transformation going. Up in the picture Boondock posted you can see the M16 front end on there, with a m16 length tightbore, 3 prong VN flash hider and the 203 and heatshield.
I'm really concerned with putting a full stock on it, but the buffer tube is a crappy design and you can't replace it with AEG or RS stocks. You can use any AEG or RS stock that fits on a buffer tube, but I'm working on a way to modify my fullstock to fit and mount over the buffer tube.
After that, I'm gunna pick up a RS upper with a fixed carry handle and mount that on.
As for the thermold mags, I'm gunna toss some duct tape around the grooves for BOTW3 so it'll look more period acurate. It's not hugely noticible if you just want a m4 i'd say get it, the mags arn't a big deal, but I'm converting this carbine into a m16a1, it makes it more difficult.