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VFC (UMAREX) MP5 GBBR Owners Thread

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Old October 10th, 2015, 14:23   #391
lassegmail
 
Join Date: Oct 2015
Location: Denmark
This gun is so much fun :-)
But what is the best plan of attack to improve this?

This is at 9 meters. 9 in a 4,5cm group, and 1 flyer.
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Last edited by lassegmail; October 10th, 2015 at 14:25..
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Old October 25th, 2015, 16:52   #392
Danke
 
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Gamed mine effectively for the first time. CQB in a barn with temps around 2c.

Wouldn't cycle at all on propane. Gave a touch of MAP and it ran fine.

Still need more hop but otherwise very near the sweet spot.
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Old November 24th, 2015, 22:24   #393
edh
 
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Location: richmond hill
short mags

does any one know if any gas short mags fit the vfc gun?
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Old December 3rd, 2015, 14:46   #394
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Does anyone have a way to drop the fps to cqb limits say 380 or less? with the hop set I can get 390 and only drops down to 380 or below after 4 or 5 shots any suggestions?
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Old December 3rd, 2015, 15:00   #395
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Quote:
Originally Posted by _Whiskey_ View Post
Does anyone have a way to drop the fps to cqb limits say 380 or less? with the hop set I can get 390 and only drops down to 380 or below after 4 or 5 shots any suggestions?
Be a dick, fill with duster, chrono, and switch back to propane.

Possibility 1:
https://www.youtube.com/watch?v=v30g2_dxk1A

Possibility 2:

1. Shim the floating valve forward
2. Trim/Weaken the floating valve spring
3. Make a custom flow restrictor for the nozzle

Possibility 3:

http://shop.ehobbyasia.com/upgrade-p...l#.VmCfOXarS9I
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Old December 3rd, 2015, 15:14   #396
_Whiskey_
 
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Quote:
Originally Posted by BioRage View Post
Be a dick, fill with duster, chrono, and switch back to propane.

Possibility 1:
https://www.youtube.com/watch?v=v30g2_dxk1A

Possibility 2:

1. Shim the floating valve forward
2. Trim/Weaken the floating valve spring
3. Make a custom flow restrictor for the nozzle

Possibility 3:

http://shop.ehobbyasia.com/upgrade-p...l#.VmCfOXarS9I

Thanks for the info and links Bio,
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Old December 5th, 2015, 18:02   #397
edh
 
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Location: richmond hill
duel mag clamp?

any one found one that fits the vfc green gas mags?
i have 2 one i just got from marstar it is real steel and it does not fit either...these mags seem fat.
are the c02 mags the same..i have not got one yet?
thanks for any help

Last edited by edh; December 5th, 2015 at 21:12..
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Old December 5th, 2015, 22:09   #398
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Duct tape it, Walmart has camouflage for 5$
If both same side up, you need spacer.
If reverse side, then just tape them
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Last edited by N_Force; December 5th, 2015 at 22:12..
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Old December 6th, 2015, 13:34   #399
edh
 
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Quote:
Originally Posted by N_Force View Post
Duct tape it, Walmart has camouflage for 5$
If both same side up, you need spacer.
If reverse side, then just tape them
well i am going for the looks..i am a collector do not play
thanks though
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Old December 7th, 2015, 14:48   #400
lassegmail
 
Join Date: Oct 2015
Location: Denmark
Anyone have the Angry Bird 120% recoispring120
Wondering how much stronger it actually is.
With the OEM spring with the bolt on top, I tare the scale and press the bolt down until just before it touches.
Gives me 1250g. Anyone tried that with the Angry Bird?
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Old December 18th, 2015, 12:22   #401
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Greetings from Moscow!
I join you with my MP5A3 (ver. 1)
Thanks to the forum for the solution of many problems. I set the Azimuth bolt sliders and original reinforced nozzle (of VCF). Also i milled original loading ramp (v.1) to make smooth channels in both sides. The gun is no longer jammed balls and then I successfully played 2 CQB games. There was a problem with excessive release of gas, but I'm hope to solve it by changing the size of the inlet of bulb.

Best regards!
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Old December 18th, 2015, 14:15   #402
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What's the temperature when the gas release is excessive?
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Old December 18th, 2015, 15:59   #403
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Normal room, 18-20C. But is not permanent problem. From time to time, and i can't see any regularity.
The feeling that freezes the gas chamber . I think to reduce the rate of filling the chamber and slightly lower power . For CQB it would be even better (now the power 118-121m/s , is on the verge of the permitted) .

Last edited by dr.collapse; December 18th, 2015 at 16:06..
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Old December 18th, 2015, 22:30   #404
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Full auto or semi when venting?
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Old December 19th, 2015, 04:42   #405
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usually auto (short) and fast semi
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