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**bri91xj** · June 15th, 11:06 PM

Those who run their guns off Nitro. Is the Low pressure cell that stix out under the barrel needed when nitro is used? Does it affect it any?
thanks for any imput. I'm buiding a Spyder and will run it off nitro when done
thanks
brian

**Stan** · June 15th, 11:09 PM

it is not really needed, i have nitro and i dont need one, the only reason you mght need one is if you were running lp and then it could store some extra air if your marker was starved, but you really dont need t, just a waste of money

**bri91xj** · June 15th, 11:12 PM

just wondering, cuz i have the stock one, i was thinking about buying a better after market one. but if its no real help i wont worry about it.
are there any other alternatives for something to put in place of the Low pressure cell?

**sick_dawg** · June 15th, 11:18 PM

Yah, the low pressure chamber doesnt have any affect on performance on spyders. They are made for higher end guns that run at super low pressures as a reserve to help eliminate shootdown, but are mainly decoration on spyders.

**samanoususke** · June 15th, 11:30 PM

Aftermarket LPC's are a waste of money. The only way I would every buy an aftermarket LPC is if I was making my Spyder closed-bolt.

**bri91xj** · June 15th, 11:37 PM

what exactly is the closed bolt design? or give me an example of a marker with a closed bolt

**sick_dawg** · June 16th, 01:49 AM

An autococker is closed bolt. When you pull the trigger, the bolt is already forward with a ball in the chamber, then it fires, pulls the bolt back to let in another ball, and closes again.

Spyders are open bolt because the bolt stays out, then you fire and it pushes the ball into postion quickly before firing it, then recocks and starts over.

**Denzil** · June 16th, 03:50 AM

Thank you sick for that explanation. I couldn't figure out what was the difference between open and closed bolt until I read your post.

**bri91xj** · June 16th, 12:18 PM

so how would you go about making something a closed bolt? its it rather hard?

**Stan** · June 16th, 01:05 PM

you usully have to buy a gun that is a closed bolt, or yuou coul do a really expensive mod like the spyder to cocker mod

**Denzil** · June 16th, 01:27 PM

Any threads on this modification? I'm interested to see how it works in making this conversion.

**Stan** · June 16th, 01:29 PM

http://www.ottersccustoms.com/spydercockerx.html

heres a mod otter did to turn a spyedr into a cocker

**bri91xj** · June 17th, 08:50 PM

so the basic idea is to have air behind the bolt to push it closed and in front of the bolt to push it open? being controled by the ram? On that page, what all did he have hooked up to the back block? And wouldn't air escape thru the cocking nob slot on the Spyder Compact?
thanks for the help.
Just trying to understand this

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