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CQR Mod 2 FPS


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#1 rccapps

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Posted 19 August 2013 - 06:02 PM

I have a CQR mod 2 that is about 3 months old, shortly after getting it I change the cylinder to a km4 cylinder. The gun was shooting at 330 fps new and now its shooting at 400. The problem is I would like to have it very close to 360 as the indoor site I play has a 360 fps limit with .20. What spring could I use to get me close to the 360 fps I need with out going back to the stock cylinder. Other mods are madbull 300 mm 6.03 tbb, with flathop and a simple mosfet. Thanks for reading and for any help.

#2 vanevery

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Posted 19 August 2013 - 09:00 PM

M110 Main Spring. You could try getting a longer inner barrel thus producing an under-volume system. You will need a mock barrel extension to cover the exposed length of the inner barrel.

#3 Icurblud

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Posted 20 August 2013 - 07:28 PM

I put a type the same cyl, a new m110 spring, 363mm inner barrel ( 6.03 madbul tbb ), new double o ring piston head, corrected aoe, and 2 teeth short stroked and I am getting 355-365 fps. I was told by short stroking you will loose approx 10 fps per tooth.   This is in my mod 2.

#4 Chuck S

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Posted 21 August 2013 - 03:20 AM

The expense of the above modifications plus the time required to make swaps to and from different configurations would justify another complete gun for me.  One optimized for "field" work and the other for CQB.

A complete CQB gun is $180.  Just go for it.

-- Chuck

#5 niko_gpsy

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Posted 21 August 2013 - 01:17 PM

View PostChuck S, on 21 August 2013 - 03:20 AM, said:

The expense of the above modifications plus the time required to make swaps to and from different configurations would justify another complete gun for me.  One optimized for "field" work and the other for CQB.

A complete CQB gun is $180.  Just go for it.

-- Chuck
I agree.  Some of us need a gun for each and every occasion. lol




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