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ILLusion · June 11th, 2007, 17:12

It's to increase shot consistency, reduce impact on the gearbox, reduce the air volume and increase ROF. It doesn't have much to do with FPS.

Short-barreled guns do not require such large air volumes. By reducing the air volume to only the forward portion of the cylinder, you get crisper shots out of the barrel, where the spring is travelling at its fastest.

Also, if you have a sealed cylinder, the BB exits the inner barrel during the first half of the piston travel. The second half of the travel becomes unrestricted, and when the piston head slams shut, you experience a partial dry fire. This is half of why you need to match cylinders to barrel length.

4 posts above yours:
http://www.airsoftcanada.com/showthread.php?t=18038
"Why match cylinder porting and barrel length?"

June 11th, 2007, 17:12	#2
ILLusion GBB Whisperer Trader rating Join Date: Jun 2002 Location: Toronto	It's to increase shot consistency, reduce impact on the gearbox, reduce the air volume and increase ROF. It doesn't have much to do with FPS. Short-barreled guns do not require such large air volumes. By reducing the air volume to only the forward portion of the cylinder, you get crisper shots out of the barrel, where the spring is travelling at its fastest. Also, if you have a sealed cylinder, the BB exits the inner barrel during the first half of the piston travel. The second half of the travel becomes unrestricted, and when the piston head slams shut, you experience a partial dry fire. This is half of why you need to match cylinders to barrel length. 4 posts above yours: http://www.airsoftcanada.com/showthread.php?t=18038 "Why match cylinder porting and barrel length?" __________________ *Advanced Airsoft Armaments and Enhancements* Quick to the gun, sure of your grip. Quick to the threat, sure of your shot. Diligentia, Vis, Celeritas Accuracy, Power, Speed Last edited by ILLusion; June 11th, 2007 at 17:16..