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BIGMEDCIN · July 27th, 2012, 02:36

I have found with the perfect, or well, what I perceive as perfect, cylinder volume to barrel length with have a effect on how loud a piston slap you get.

here is my thoughts, I have put a full non port cylinder in an M-4 with an AK 455mm barrel, the sound is very low! that same cylinder with a CQB barrel 300mm is a far bit louder!

I think if your compression is done before your BB leaves the barrel! you have an buffeting effect ie: you still are pushing against an air resistance given you a cushion of sort.

Now take the shorter Barrel and the BB leaves and the piston is still accelerating, now you have no resistance since your BB is gone, open barrel no cushion and a louder slap!

I think an M-4 ported cylinder with an AK-47 length barrel would be the best starting point, you will not give up FPS but get the effect of reverse dynamics on the piston as it travels.

of course I think the end results are not earth shattering, but I have noticed a difference, I believe with better cushioning material this method would work even better.

just my findings

July 27th, 2012, 02:36	#2
BIGMEDCIN Trader rating Join Date: Jun 2005 Location: Lower mainland BC	I have found with the perfect, or well, what I perceive as perfect, cylinder volume to barrel length with have a effect on how loud a piston slap you get. here is my thoughts, I have put a full non port cylinder in an M-4 with an AK 455mm barrel, the sound is very low! that same cylinder with a CQB barrel 300mm is a far bit louder! I think if your compression is done before your BB leaves the barrel! you have an buffeting effect ie: you still are pushing against an air resistance given you a cushion of sort. Now take the shorter Barrel and the BB leaves and the piston is still accelerating, now you have no resistance since your BB is gone, open barrel no cushion and a louder slap! I think an M-4 ported cylinder with an AK-47 length barrel would be the best starting point, you will not give up FPS but get the effect of reverse dynamics on the piston as it travels. of course I think the end results are not earth shattering, but I have noticed a difference, I believe with better cushioning material this method would work even better. just my findings Last edited by BIGMEDCIN; July 27th, 2012 at 02:41..