Custom External TK.45 with titan and boost 40k motor. Started life as a special edition TK.45 then had stock and recoil system exchanged for the adjustable fps system and tanker stock. Only one of its kind. Comes with 4 mags. Internals are stock aside from a gate titan and a boost 40k motor installed! Shoots like a dream! Will include a field and a cqb spring to change between and then tune to your desired fps! Price is negotiable!