Bill Bryant
10-24-09, 13:47
(I posted this on another forum but would be interested in feedback here as well.)
In his excellent thread Quib tells us that the "carrier gas key should engage gas tube with no noticable resistance":
http://www.weaponevolution.com/forum/showthread.php?t=1613
I'm wondering what should be considered "noticable resistance." When I do the test and let the bolt carrier slide on its own, I can't tell when it engages the gas tube. When I assist it with my hand, I can just feel the spot where the carrier key and gas tube first meet. There's a little tick or click, the carrier key shifts its position ever so slightly, and then it slides on down. I've just built my first AR and have no idea what the Go/No Go point is with regard to this interface.
Can't feel the point of contact at all?
Can feel it but not any additional drag thereafter?
Can feel it but gravity pushes it right on through every time?
Won't go on down without a shove?
Which am I looking for?
I've had my rifle out in the woods and it ran without a hitch. Still, my engineering/machinist side is curious.
In his excellent thread Quib tells us that the "carrier gas key should engage gas tube with no noticable resistance":
http://www.weaponevolution.com/forum/showthread.php?t=1613
I'm wondering what should be considered "noticable resistance." When I do the test and let the bolt carrier slide on its own, I can't tell when it engages the gas tube. When I assist it with my hand, I can just feel the spot where the carrier key and gas tube first meet. There's a little tick or click, the carrier key shifts its position ever so slightly, and then it slides on down. I've just built my first AR and have no idea what the Go/No Go point is with regard to this interface.
Can't feel the point of contact at all?
Can feel it but not any additional drag thereafter?
Can feel it but gravity pushes it right on through every time?
Won't go on down without a shove?
Which am I looking for?
I've had my rifle out in the woods and it ran without a hitch. Still, my engineering/machinist side is curious.