How to Cut Down Airsoft Inner Barrel

What To Consider When Upgrading Your Airsoft AEG Gun's Inner Barrel

I always see questions on forums similar this: "Which barrel length will give me the best accurateness for my gun?", or "I want to put a longer barrel in my gun. Which length should I go?south The question of barrel length and accuracy are not necessarily related. These questions require a bit of explanation, and there are many factors when talking well-nigh barrel length, accuracy, efficiency, etc. It all comes down to volume matching the cylinder volume to the barrel volume.

Hither is the formula. I will get into this a fleck later.
V = Pi 10 R^two ten H
Five = Volume
Pi = 3.1415
R^two = Radius of the cylinder squared
H = The height of the cylinder. Measured from the front of the cylinder to the port (if there is a port in the cylinder)

If yous have ever taken a gearbox apart, you will notice that guns have different mode cylinders. At that place are 4 main types of cylinders:
– Total Cylinder (No holes) 455mm-509mm (590 at the most)
-four/five Cylinder (Holes iv-fifths of the way to the dorsum of the cylinder) 407mm to 455mm
-3/4 Cylinder (Holes three-quarters of the way to the back of the cylinder) 247mm or 363mm
-1/2 Cylinder (Holes in the middle of the cylinder) Under 200mm

These cylinders are designed to be used with specific barrel lengths. The numbers to a higher place are estimates. For example, if you accept a 1/2 ported cylinder, you would non desire to try to apply a 590mm barrel. This is because the volume of the cylinder (the Height – h) is halved considering of the ports in the cylinder, and the cylinder volition not have enough air book to properly push the BB through the barrel. When this happens, the piston has completed its bike and hits the front of your cylinder head, while the BB is still in the barrel. This causes FPS loss and will really hinder accuracy/distance. This is especially the case if you are using a heavier BB, because the BB will require more than air to propel it through the butt.

Great, so I have all this information, merely how do I put it in to practice? Get-go y'all want to go the ratio for your gun, which is achieved by taking the volume of the bedroom (your cylinder) and dissever it past the book of the barrel (which is basically a long skinny cylinder). When I measured the ratio in my ASG M60, I calculated a ratio of ii.86:1. This means that I had ii.86 times more air volume in the cylinder than in the butt. Some people would consider this "over volumed". That M60 had a 363mm barrel with a full cylinder. If you lot expect at the chart above, you will see that a 363mm barrel is not commonly paired with a total cylinder.

This seems similar a lot of piece of work, practise I really need to exercise this? Not necessarily. If you follow simple guidelines and understand that slapping a 590mm barrel in a CQB M4 gun will non gain you lot distance or accuracy, yous will be fine. Guns tend to exist volume matched from the factory (although this is non always the case) and at that place is a reason why your M4 comes with a ported cylinder. In the case of book, it would exist better to over book rather than under volume.

How does BB weight cistron into this equation? Good question and it is actually quite simple. Let's say your M4 has a 363mm barrel in information technology and you desire to use a .32g BB. More than likely your gun will not have enough air volume to propel this BB out of the barrel earlier the piston has completed its cycle to the front of the cylinder. This volition reduce the FPS of the gun even more because it requires more "force" (air) to move the BB through the barrel.

How does barrel diameter size cistron into this equation? Technically, information technology does factor in, only the difference in the volume you get from a 6.08 when compared to a 6.01 is extremely minimal. Roughly, 98% of the volume will come up from the length of the butt.

So what should I have abroad from this commodity? I know this is a lot of information to take in. If you are going to measure your book ratio, I would shoot for a 1.8:ane to ii:1 ratio to be safe. If you plan on putting a longer barrel in a gun, it is always all-time to adjust the cylinder as well. I have found that it is always better to over volume, as stated before. I hope this helps you empathize barrel upgrades in guns. If you are unsure, you tin can give u.s.a. a call at the shop and nosotros can help you out.