adjustable fps & qc springs, I'll send it with an m125 if you buy it or if it'll make the trade even. madbull 6.03, m160 rated speed and torque motor, comes with stock Mag and an s&t 500rd highcap. semi auto is kinda weird, but I have a mosfet plugin that's can throw on for an extra $20 that makes it absolutely dope. I'd prefer to keep the mosfet so it'd be super cool if you'd just get one for yourself but I can throw it in. I'm really looking for a nice sniper, but totally hit me up, the worst I can do is say no. happy hopping!