06-02-2014, 06:17 PM
1) It looks nice 
2) Stops the end of the bore being damaged by misuse.
And 3) The most important it allows the air (remember for an air rifle) to come out of the end of the barrel evenly. This is really important on an air rifle because the air in the barrel is traveling 4 to 6 times faster than the pellet. So as the pellet leaves the barrel end the air "whacks" the pellet up the backside. If the air comes out skew it will cause the pellet to wobble and lose accuracy.
DaveH
2) Stops the end of the bore being damaged by misuse.
And 3) The most important it allows the air (remember for an air rifle) to come out of the end of the barrel evenly. This is really important on an air rifle because the air in the barrel is traveling 4 to 6 times faster than the pellet. So as the pellet leaves the barrel end the air "whacks" the pellet up the backside. If the air comes out skew it will cause the pellet to wobble and lose accuracy.
DaveH