[Kyle74]

i put a spacer on the gr-2 and i just wanted to know what it does

[austin3897]

restricts volume of air which means not as high of fps..only use that if u want to play with 250fps or less

[soccerguy243]

for example: my marker was chrono'd at around 280-290 for 3 man tournament. Went and played indoor reball with two volume restrictors and fps was perfectly at the limit of 220. No adjustments needed. Hence I love my GEO and PE

[Kyle74]

so it just makes the ball slower

[Uziel Gal]

Exactly that.

If you turn the dwell and/or the HPR pressure too low, trying to get your velocity lower, you can experience cycling issues. The volume restrictors allow you to get your velocity lower without having to make any drastic adjustments to your marker.

If you are playing at normal velocity, don't install either of the restrictors.