I fixed an M4 that had (amongst other problems) a full cylinder with a 11.5" barrel...
Increased FPS by 75 with the correct porting.
The better your compression with the piston head/cylinder/nozzle, the larger a difference it will make in FPS.
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Originally Posted by Drake
Damnit, don't make me add "no discussing temporal paradoxes" to the rules or I'll go back in time and ban you last week.
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