Quote:
Originally Posted by SuperHog
What is the optimal barrel length where there is no more performance gain?
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Depends on alot of factors.
M4 is the maximum length (373 mm) in a Systema. Assuming the barrel ID is consistant, and that the hopup is the best performer available, and the cylinder is well maintained and consistant.
I have very good success with the CQBR, that is all I use.