SR15 Mod 0 - First batch commercially released (URX 3.1 rail swap)
SR15 Mod 0 Taupe (only two mags fired through rifle to date)
SR15 Magpul Edition (unfired)
SR15 Block II CQB SBR - FSGB/Ambi Lower
SR15 XMas Cheer (all parts except barrel and bolt since I was not original buyer of the lower)
SR15 Mod 1 Carbine Upper
SR16 CQB Upper
SR25 ECC'd EMC - sent back to KAC for upper and rail swap. For those the remember, the initial batch of EMC's had the welded dust covers and also had a smaller brass deflector. Being a lefty, when I would shoot bulk FMJ plinking ammo, I would get hit in my face and neck with brass so Casey (who used to work at KAC) was kind enough to take the rifle in after the Vickers Battle Rifle class to upgrade the upper and rail.
(2) stripped TDP lowers that I will one day SBR for two uppers listed above.
I've also spent who knows how much on other KAC parts that like suppressors, mounts, muzzle devices, etc..