Kel-Tec RDB replica by ARES. Includes 3 magazines, a Leupold LCO red dot sight replica, the original box, and proof of purchase. Upgraded with a 510mm precision inner barrel. Hop-up bucking: G&G Green (if I recall correctly). Piston head O-ring replaced with an X-ring for a perfect air seal. Spring upgraded to M140 (the replica features an indestructible gearbox, complete with an EFCS system). The setup delivers 2.4 Joules and performs excellently with lighter BBs.