View Full Version : Mr4 air problems

sniper boss
10-04-2011, 03:49 PM
So I did get the mr4 but when I played it would shoot 1 and sometimes 2 balls and then not fully cock. I had plenty of air, checked the o rings and oiled it but it still won't work. I an using a remote line if you think that is the problem. Please help!

10-12-2011, 09:13 AM
Ive had an,mr4 and my buddy stol does and we both had that issue...i tightened thes regulator screw and it worked for me

10-12-2011, 11:17 AM
There isn't a regulator on the MR4, Steve2012.

Sniper Boss, perhaps you may want to try screwing the adjuster screw in a bit, and then double check your velocity at the field.

10-13-2011, 06:50 AM
Well the screw that attaches to a tube when you take off the pistol grip

10-14-2011, 12:44 AM
Tube under the... huh?

Pull the part number from page 11:

10-14-2011, 12:16 PM
34 I think

10-14-2011, 01:03 PM
That's the valve set screw. If it was loose, it could cause serious marker malfunctions as well as cause your issue. However, it is most likely not the root cause in this gentleman's case since that issue is very atypical. It would be something to check out, but I think the velocity adjuster approach may be more fruitful.