Scuttlebutt around has Bass Pro Shops, "acquiring" Gander Mtn. over the next few months. West Palm Beach's Gander outlet was sold out with no date for re-stocking of 99% of AR varients, mags, accessories, M+P's, DPMS, Colt's all sold out.
Like the HBAR, price for the M+P's always work, to go into the "Bush" will work also. I will throw in my .02 cents as a proud Sig556 owner.
DPMS are harder and harder to find without some serious timing and effort.
Good Luck, The prices for these rifles will be like gas prices this summer. UP an UP.