I can play on this one....
First picture...
LR-308: 24" fluted stainless steel barrel, slick-side high-rise upper stock FF forearm, no-name optics mount, palm-rest grip, A2 Stock, Stock trigger. I did, at least, have a Leupold Mk IV optic.
AR: DTI upper, YHM light-weight forearm (cheese grater), YHM clamp-on specter gas block, palm-rest grip, heavy aluminum fore-grip, no-name optics mount, M4 Stock on commercial tube, Millet DMR optic (heavy and bulky)
Circa 2008:
Second Picture: Not Tier Unobtanium, but I am happy with it.
LR-308: 18" non-fluted carbine gas barrel, JP Cooley Tactical Brake, SWS E1 Forearm, Forward assist, low upper, MIAD grip, Surefire ladder rail covers, Larue SPR optics mount, CTR stock, Magpul Pro Rear BUIS, YHM front BUIS, RR 2 stage trigger. Still have the Leupold Mk IV. Oh... and LOOONG Harris bipod for varmint hunting.
AR: 16" carbine upper, cut-down pinned gas block, Fortis Rev 14 forearm, M16 BCG, Magpul MOE grip, Magpul Foregrip, Mil-Spec Magpul CTR, YHM BUIS , Aimpoint M3 4MOA, Laure Cantilever Mount,
Circa now: