I've been lurking on this forum for probably over a year now, and finally acquired a 15-22 today. Very clean inside and out (bought it used). It does have the blue springs, which IIRC are the 'good' ones, yes? This will be a great platform for a few tweaks and mods. I'm thinking a couple extra mags and some GRIPP tabs will be the first additions on order

Here's a "before" pic

Well...now comes the "goodies" to go along with it...didn't take me long to acquire 2 more mags than it came with (got mine used, 3 mags) so now I have 5....scope came off mine, red dot on the way, flip up sights on, forearm handle with bipod built in.....yea, it's addictive.