[lemegacool]

it depends on what fps you intend to play... wait i'll try to find the list i made on a noob's thread

here you go

-pdi tightbore 6.01 vsr lengt ... absolute joy!
-.30g bastards or heavier
- around 400 fps spring, i think mine is a m120 or 110 (i forgot but i makes my vsr shoots 397-410)
- uprgaded sears (for a 400 fps setup the 0 trigger is not absolutely needed)
- FIREFLY HARD bucking (a must with the pdi tightbore)
- metal spring guide
- laylax cylinder head (seal is freakin awesome)

in mine i still have the stock piston (removed airbreak) and cylinder... i kept them because they gives me a perfect compression ... dont forget to put oring grease on the piston's oring


gives the gun nearly 300 feet of range with no wind... now i want to try using washed bastard .36g bb's


now time to hit the bed LOL