Quote:
Originally Posted by shelcoof
Never heard of a PDI piston head upgrade. What does that do? I've heard of upgrading the mag catch to metal and madbull inner barrel upgrade but never heard of a piston head upgrade.
Mine comes stock with Metal slide and Outer barrel as well I think. Any reason why I can't use the stock springs for the new slide and barrel?
I know if I was coming from a plastic slide and barrel but already metal to begin with  |
First, the productid on the UNCompany is "1337". Secondly, it's sold out everywhere online and supposedly not manufactured any more, you can however find piston heads for TM based guns. From what I understand is that the piston head upgrade gives you a better seal on your gun and not only does it increase FPS by about 5-10 but also makes the system slightly more efficient.
http://www.uncompany.com/pageproduct...sp?prodid=1337
If it comes stock with metal slide then no worries. My suggestion of the upgraded recoil spring and spring guide was mainly because I assumed it came stock with plastic slide and plastic OB if you upgrade from plastic to metal and the tension doesn't "match up" the blow back action becomes "sluggish" since the slide and outer barrel are now heavier.