There are a lot of different things you can do to an Airsoft gun. You can upgrade the feet per second by changing out a spring. You can upgrade the accuracy by installing another inner barrel. One that has a tighter iii. Now, your BB is generally about 6 millimeters, it’s actually a little bit less, around 5.95 millimeters.
The accuracy is greatly affected by how much the BB actually, physically moves around in the barrel. Any by allowing it to move less, it’s going to improve your accuracy. Now, when you start upgrading the feet per second and the gun, you also might want to look into upgrading some of the other internals of the gun. Because, they are now taking more of, more of a load and can possibly become damaged.