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Question on nozzle lengths


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Old August 23rd, 2019, 12:10   #1
sly mantis
Join Date: Oct 2008
Question on nozzle lengths

Recently picked up some nozzles for a g36 and mp5. i decided to measure them just to confirm and found that they were shorter than i expected them to be from looking online at specs.
The g36 nozzle measured 23.5mm vs 24.3 spec i found online and the mp5 was 18.0mm vs 20.4mm spec. Pics attached, these are shs nozzles.

Im wondering if im either measuring these the wrong way, i got the wrong part, or are there different lengths for different versions of these guns?

Attached Images
File Type: jpg thumbnail_IMG_20190822_215952601.jpg (230.3 KB, 5 views)
File Type: jpg thumbnail_IMG_20190822_220021718.jpg (201.4 KB, 3 views)
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Old August 23rd, 2019, 20:49   #2
Ratters's Avatar
Join Date: Jul 2003
Location: Vancouver
nozzle dilemma

G36's use two different lengths long/short
AK's use two different lengths long/short
MP5 series / MP5K, two different lengths long/short

as do many others.

You've already won half the battle by owning vernier calipers.

Best suggestion i can make is always measure the stock nozzle and then order.

send an e-mail first to the seller to confirm long or short version, request a measurement. some forward thinking nozzle makers now laser etch the length into the nozzle, very handy.

in closing, some cylinder heads are also designated as long or short
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Old August 23rd, 2019, 21:49   #3
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Join Date: Sep 2013
Location: Scarbororororough
From my experience... in a nuteshell:

Different brands will have different specs for the same gun.


For example: G&G Mp5 and Cmya Mp5 although they are the same gun will have a different measurement for the nozzle, gearbox, body, etc.

Another example: sometimes a gearbox's front end will be thicker at the front and that pushes the hop up forward, which results in needing a longer nozzle compared to another gun that has a thinner front.
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Old August 24th, 2019, 00:28   #4
sly mantis
Join Date: Oct 2008
how much contact should there be between the nozzle and the bucking?
im working on a bit of a frankengun right now so im not 100% that the nozzle in it is the correct length.
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