I have a LNIB Black Dog Machine LLC' drop in conversion .22 conversion kit for AR-15.  Everything I have includes: complete drop in Bolt Carrier Group and Original 25rd magazine kit ($275.00 value), Black Dog Machine LLC' 50rd Drum magazine ($80.00 value), and about $250.00 value of .22 ammunition.  Everything I have all together is about $600.00 value, I am asking $200.00 for everything all together or trade: ammo, optics, ETC!