View Full Version : 5 shots then re-cock

11-19-2007, 08:26 AM
Hi again guys!, i have this problem since i bought my MR2.

Everytime i try full-Auto it fires 5 to 6 shots then i have to re-cock my gun. i have fired only one paintball box (2000rds) since i bought my MR2. i took apart the bolt and compressed the acs spring and left it for two days, it became a littel bit softer but still have the same problem.

do you think i have to do more acs break-in or there is something more i am missing? i know you guys can help me, thank you :o

Here's my MR2 setup:
Loader Fasta 18V LED
20" SP tactical barrel & stock barrel
Spyder Red Dot 30mm
Kingman clamping feed-neck
20oz Co2 tank

11-19-2007, 08:30 AM
i guess you would also like to know.
Of the 2000rds fired i guess it had only chopped 2 or 3 i'm happy with that,
also my gun doesn't double feed.

11-19-2007, 09:04 AM
10-1 it's the CO2 freezing the internals at the higher rate of fire. I'd suggest trying a friends HPA tank on it and see if it still does it (re-cocking failure).

As for the anti-chop bolt...it can take a few can take a few cases for the springs to be fully worn in. I'd just play with it as it is and let it "wear-in" naturally.

Keep up the proper maintenance for the marker...oil on Orings about every 500-900 shots...springs so they don't rust...etc..

11-19-2007, 09:15 AM
yeah i would like to try HPA, and give more break-in to the acs spring. i guess my gun is still new. i take all the internals, clean and oil every time i start and finish playing because i don't play too often, like 2 times a month. thank you.

11-19-2007, 09:29 AM
10-1 it's the CO2 freezing the internals at the higher rate of fire. I'd suggest trying a friends HPA tank on it and see if it still does it (re-cocking failure).

would an expansion chamber help not freeze the internals so much?

11-19-2007, 03:28 PM
it would, but expansion chambers in my eyes arent really worth the upgrade or bang for buck

you're better off getting the co2 anti siphoned

11-19-2007, 11:10 PM
chnk is right. Antisiphoning your CO2 tanks would go a long way for the marker but...

A Palmer's Stabilizer is a great (but expensive) CO2 reg and by far, a better choice than an expansion chamber. Couple this with the antisiphon tube (your propshop can do them) in your CO2 tank and you can run CO2 until the planet goes into it's final stages of global warming :D

mr1 sniper
11-20-2007, 07:14 AM
also, remote lines do work as a expansion chamber somewhat, maybe trying one of those would work.

12-05-2007, 11:38 AM
Hi again guys, i found this air system:


Its a pure energy 45/4500 low pressure output, it says it has a 400psi output.

Do you think it will work fine with my stock MR2??? plz guys help me wit this. thank you.

12-05-2007, 01:06 PM
no, find a high pressure output one which is like 800 psi or 850 psi

12-05-2007, 03:01 PM
I think it took my bolt lamost 5days before it stopped doin what urs is doing. Wouldnt hurt to keep doing it...

And yeah u need a high output tank.

12-05-2007, 06:56 PM
what is the operation pressure of a mr2?

i will see if i can convert that tank regulator to High pressure output, i found that theres a PMI LP conversion kit wich is made of 12 bellevile spring and orings. the HP regulator has 10 pc bellevile spring while the LP has 12.

chech it here: http://www.buypmi.com/pdf/pressure_springpack.pdf