[Styrak]

OK, so I have a TM VSR GSPEC, and stock (how I got it), it was shooting around 400fps on stock parts except the spring. I added some parts and it's shooting LOWER!

I bought:
Laylax PSS10 M150 Spring
Laylax PSS10 Bearing Spring Guide
Laylax PSS10 6.03mm Barrel
Laylax PSS10 Zero Trigger Set

Now, first of all I found that the Zero Trigger piston was binding in the stock TM cylinder ($250 trigger/piston set, what the fuck?), so I had to sand down the (what I assume to be) delrin/plastic guides on the side so that it would freely float back and forth inside the cylinder. This was my first reasoning behind the low FPS, but like I said I sanded it and still the same results.

After adding these parts (minus the tightbore, because I wanted to compare apples to apples) it was shooting around 380fps, 20fps lower WITH AN M150!

After doing said sanding and making sure the piston didn't have any interference with the cylinder, I put it together and got the same results.

I swapped the TM piston back in and got 440-450fps. Wat.

I swapped the Zero Trigger piston back in, and put on the stock TM oring, and the best I could get it up to (including installing the tightbore) was about 430fps. I would assume with the M150 it would be closer to 480 or 500fps.

My last thought which I haven't done anything about, is that I'm using a Firefly soft hop rubber (I know, but hards are out of stock everywhere). Would this be a factor in that it isn't holding onto the BB hard enough so the piston can impart enough energy on the BB?

Any suggestions would be helpful, thanks. Right now I have all the parts in except I'm using the stock TM piston @ 430fps.