Hi guys, looking to sell my SR25 today. Internally, everything is upgraded. The only stock parts left in the gun are the spring guide, cylinder, and contacts. O ring nozzle and piston head, aftermarket piston and spring, shs gears, and an asg high torque motor. It has a modify flat hop and a prowin hop up with a madbull 6.03 tight bore. It shoots around 440 and is locked in semi but only by the selector, I still have the stock one laying around. I use it with an 11.1 buttstock lipo but it will run on 7.4. I have 9 mags for it as well. Would love to Tr ade for an hpa engine. Thanks for reading!