Both my Tigers and my Super Pershing wound up as non shooters because of adding the gun tube extension and lengthening the gun tube.
How do I do this? Do I just need the brass tube the length of the tank gun and what do you mean by resizing except for cutting to exact legth? Next, checking Airsoft site, I see no section for parts, so where do I look for different sizes? There is supposed to be a better BB out there, even some biodegradable, but haven't seen any ads.

If I just open the the muzzle brake hole and use the existing brass tube, how does it sit against the O ring and what's the procedure for seating it? Never messed with the guns before and would like to get them shooting again. My M-41 never did shoot well at all....kinda pooped it out enough the dribble out the muzzle.

Would appreciate your help and advice.
thanx
Bill