these guns are so easy to work on and easy to get to your required power as mentioned above there is loads of free info on google. you can also buy dvds on tuning them on ebay for £2.50
hello there, i know this is an old post, but if you still have any of these parts could you please let me know. and will a .22 breach not fit over the .25 barrel then? as i want to convert mine. many thanks