Nothing showed up in a forum Search. so thinking about getting a pistol carbine kit for CQB (for TM M9 or Hi Capa based) and want to run an extended barrel, is there a rule of thumb or calculation for increase/decrease of FPS relative to barrel length or is it just a case of fit it and see? If I put a 300mm + barrel is going to be a likelyhood of it running hot or not?
Fps Increase V Barrel Length
- Thread starter BigStew
- Start date
Adolf Hamster
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- Feb 1, 2018
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i've not seen one.
it's related to the original length that the gun is gassed for, so adding 100mm to a pistol is gonna have a bigger impact than taking 100mm off a rifle.
if it's for cqb tbh i wouldn't even bother changing it, effective range of a tm pistol is more than fine for those kinds of distances.
it's related to the original length that the gun is gassed for, so adding 100mm to a pistol is gonna have a bigger impact than taking 100mm off a rifle.
if it's for cqb tbh i wouldn't even bother changing it, effective range of a tm pistol is more than fine for those kinds of distances.
- Thread starter
- #3
More than likely. my main reason for a longer barrel was it to be in line with the outer barrel so that the BB doesn't ricochet.
Adolf Hamster
Supporters
- Feb 1, 2018
- 7,057
- 2,229
shouldn't be too much of an issue.
if the bb path/outer barrel is deviating enough for that to happen then there are bigger problems at stake
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