MP5 Cylinder?

brently0725 · July 18th, 2006, 14:35

What is the use of this hole in the side of the cylinder?
What would happen if it was covered up?

I heard that the sniper rifles don't have them.

Sorry if this is a stupid question but please could someone answer me!!!

CDN_Stalker · July 18th, 2006, 14:46

It's a port and causes a rapid compression of air, required for shorter barrels (like sub-M4 length barrels). The longer barrels dont' require it due to higher internal volume. If you cover it up, your fps will drop among other things.

That's the nutshell, was MadMax or Illusion at one point that wrote a large explanation about ports on barrels.

ILLusion · July 18th, 2006, 14:51

The position of the hole is required depending on the length of your inner barrel.
Sniper rifles don't have the port because they tend to have longer inner barrels.

By introducing a port on the cylinder, the effective volume of air that gets pushed out of the cylinder is reduced to just what's in front of the port. This also increases the rate of fire.

The reason why the port is put towards the rear of the cylinder is so that the most effective range of the spring's power is applied to the BB, which is when the spring reaches full extension, rather than at the beginning of it's extension.

Autumn · July 18th, 2006, 17:55

Wow, you know your stuff ILLusion.

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July 18th, 2006, 14:46	#2
CDN_Stalker Official ASC Bladesmith Trader rating Join Date: Jul 2003 Location: Ottawa, Ont.	It's a port and causes a rapid compression of air, required for shorter barrels (like sub-M4 length barrels). The longer barrels dont' require it due to higher internal volume. If you cover it up, your fps will drop among other things. That's the nutshell, was MadMax or Illusion at one point that wrote a large explanation about ports on barrels. __________________ STKR Knives http://www.facebook.com/#!/pages/STK...17036668380871

July 18th, 2006, 14:51	#3
ILLusion GBB Whisperer Trader rating Join Date: Jun 2002 Location: Toronto	The position of the hole is required depending on the length of your inner barrel. Sniper rifles don't have the port because they tend to have longer inner barrels. By introducing a port on the cylinder, the effective volume of air that gets pushed out of the cylinder is reduced to just what's in front of the port. This also increases the rate of fire. The reason why the port is put towards the rear of the cylinder is so that the most effective range of the spring's power is applied to the BB, which is when the spring reaches full extension, rather than at the beginning of it's extension. __________________ *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

July 18th, 2006, 17:55	#4
Autumn Trader rating Join Date: Jun 2006 Location: Coquitlam	Wow, you know your stuff ILLusion.

MP5 Cylinder?

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