Technical information

Practical A.E.G Upgrade 2006

Different guns use different cylinders that have different number and

position of openings. Why’s that?

Is it useful to block the cylinder opening altogether?

Let’s look into the number and position issues separately. Talking about the

number of openings (also known as auxiliary ports), there are many

arguments supporting the use of multiple evenly distributed openings (such as

smoother compression, stabilized air flow …etc).

Frankly, the difference between one bigger opening versus multiple smaller

openings isn’t that significant in a real world context. We do see a direct

relationship between the position of an opening (how far it is from the cylinder

head) and the barrel length. Ever wonder why all TM AEG models can achieve

almost-identical muzzle velocity even with different barrels? The key is the

positioning of the cylinder opening.

A proper cylinder configuration should be able to accommodate sufficient air

(and enable efficient compression) so the bullets can be successfully propelled

out of the barrel while maintaining the targeted velocity.

When the piston is driven backward, air is sucked into the cylinder. When spring

compression is completed, the piston head is in a position before the cylinder

opening:

Upon releasing the compressed spring, the piston immediately moves forward –

The piston head position. Also refer to the

illustration below.