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Posted: 6/10/2003 8:48:50 PM EDT
I acquired an 11.5" heavy barrel that I am going lengthen to 16" by permanently attaching a fake silencer.

The person I bought the barrel from said that it did not have a "gas port" drilled in it yet.

All of the diagrams I have seen show the gas tube coming straight out of the front of the upper receiver, and into the front sight.

Is there supposed to be a small hole (drilled into the barrel) under the front sight base?

The only hole drilled into my barrel (except the bore) is a small hole where the barrel-centering pin should be. This hole does not go all the way through to the bore, I would guess it is about 1/8" deep. Is this some kind of defect, or can I just fabricate / buy a centering pin to install?

Any help would be greatly appreciated!
Link Posted: 6/11/2003 2:49:13 AM EDT
Originally Posted By Blackgun_Fun: Is there supposed to be a small hole (drilled into the barrel) under the front sight base?
View Quote
Yes.
Link Posted: 6/11/2003 3:05:51 AM EDT
[Last Edit: 6/12/2003 2:20:45 AM EDT by RAMBOSKY]
Sure does. Without the hole under the front sight the gas tube won't have any gases flowing back to the bolt carrier and therefore it will not cycle.
Link Posted: 6/11/2003 7:39:24 AM EDT
Yes
Link Posted: 6/11/2003 8:06:53 AM EDT
Thanks guys. Being a newbie is a bitch.
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