GMTA (and spend alike). Most of my changes reflect my preferences in ergonomics. Except for the Timney target trigger, and the new 50-round drum (also available for H&K G3s and FN FALs).
These types of rifles would have been considered bona fide sniper rifles 30-35 years ago. Now these types are "urban shooting gallery" rifles for designated marksmen at the platoon level for use in cities. To reach out and touch someone reliably at 1000m and beyond still requires a bolt action for now. The Army is rebuilding all their Remington 700s in .300 Winchester Magnum (please, please let there be ammo overruns). Beyond that, the money seems to be on the .338 Lapua Magnum. The Canucks seem to like the AI rifle, having set two consecutive world records for first-shot kills. The ranges were, to my best remembering, 2400 and 2600m. Them's bragging rights.
And FYI to anybody with the DPMS SASS, the trigger and hammer pins on their OEM target trigger are .001" undersize, with a diameter that does not correspond to any known SAE, metric, or other oddball drill stock or pin. But the standard pin size is a common SAE diameter, and I just used my fingers to run a reamer through the holes to bring them back to normal, and open up the world of aftermarket parts.
All the trouble they went to, and it only slowed me down for about 15 minutes.