This is supply and demand at work.
Supply has been pretty constant, only ramped up recently, and not in significant quantities (firearms, ammunition, and accessories). Demand FAR outstripped supply since SH in December.
Because of our "JIT" (just-in-time) manufacturing/shipping/stocking practices, retailers shelves were cleared and became much more difficult to restock. Once it became clear the ban was going to fail, demand dropped a ton (some might argue it is also because the consumer is maxed out on credi -er, tapped out financially). So the increased stock orders were met with lesser demand - leading to surplus inventories.
Surplus inventories = loss of money for retailers, so expect discounting and lower prices overall soon as the glut of parts and rifles continues.
Ammo is still supply constrained for the popular calibers as ammo production was already working 24/7 previous to SH and the only increased shipments are likely to be from the Russians, Serbians and Ukrainians, and will be several months delayed due to shipping, customs, etc. Not to mention all those new guns need something to feed them with.
So if you're like me and happened to stock up quite a bit 2010-2012 before everyone went full retard, you likely made a handy profit... and will be (re)buying parts on the cheap a few months down the road.
I should mention that the same thing happened 2008-2009, though on a lesser scale. History repeats itself...