[CDN_Stalker]

Honestly, I swear that PDI is low on stock, so they send out all the practice springs that new employees practice making!

In the past 7 or 8 months I've been working on team guns and a few other local players guns, and have installed (or attempted to install) mostly PDI 150% springs, and they are getting BAD! Not only are they too long (7") but they are made of thicker wire (eyeballing looks like 0.5mm thicker.)

The PDI spring I have in my MP5 is a PDI Pro 150%, came in a box as opposed to a bag like all others are now, it measures 6 3/8" long and shoots 350fps (370fps now with the bearing spring guide I installed). This is a good 150% spring. Others that have been installed, and those that I didn't install, are shooting between 390fps and 450fps with .2g BBs. I've found that for the most part, these springs are a royal bitch to install, have had some even bend out of shape trying to compress it. Even one I tried to install in my MP5 I found it impossible, ended up gradually cutting an inch of length off it, got it installed, but was still so strong that it overran my anti-reversal latch!!!

Anyways, point of this being, don't buy the PDI 150% springs anymore, and retailers should measure the length and send back any that are too much. Sure you might get a huge fps boost, but is it worth it? (NOTE: I had my true PDI 150% spring in my MP5 for a couple months, ran about 3000-4000 BBs through it, then my stock mechbox blew the end off. If this happened to me with my mild spring, what do you think a super strong spring will do?)