
Originally Posted by
Iraqgunz
Regardless of what the Canadians did to their weapons, my Colt instructor told the class that it will cause problems just like you are experiencing. Since he has been affiliated with Colt for over 10 years, is one of their largest distributors on the west coast, I tend to believe him. If the problems were not present prior to the mod, I would guess that there was an effect.
Also, cleaning the gas tube with a pipe cleaner will do nothing but give you slightly dirty pipe cleaners. Since the carbon is super heated in the tube it will not come out unless you use something (chemical) to loosen it up.
With an M4 set up you have to realize that the dwell time is shorter and more violent due to the gases moving faster through the shorter barrel and then the gas tube returning back to the bolt carrier key. With a rifle it is the opposite because of the longer barrel and gas tube. If you used the correct punch to remove the gas tube pin, then the hole should not have gotten enlarged. Was the gas tube you put in, new or used? Did you re-use the same roll pin? (not recommended). Also, you should generally not re-use any type of roll pin, FSB pins or anything else. They are almost always consider one use items. That is the rule for every armorer school that I have been to.
Is the gas tube straight and mating up to the bolt carrier key properly?
What kind of ammo are you shooting? There are alot of variables that come into play. You could always put it back into its' original configuration and then see if the problem persists.
BTW- Why did you Scotch-brite the gas tube???
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