I am new to the AR platform.
I built up an AR over the winter and now that I have been able to get out to the range, there are some problems.
The symptoms I have (in the order I noticed them)
a) The bolt does not lock back on an empty magazine.
b) Sometimes the bolt does not pick up the next round (bolt closed on an empty chamber)
c) Steel cases only extract about 3/4 of the way (neck still in chamber, full stop)
d) sometimes I get the bolt ramming into the side of a round that is starting up out of the magazine putting a nice big dent in the side of the case.
a) and b) are clearly the bolt not moving far enough back.
c) might be not enough force on the bolt to extract the less slippery steel cases
d) I am not sure about, but it might be related to a) and b)
When I first test fired it (right before the big blizzard), it fired and ejected, but was effectively a single shot rifle... it wouldn't pick up the next round or lock back on empty. I lubed the crap out of it, and now it generally feeds multiple rounds but won't lock back. It also occasionally munches the side of a case it is feeding with it wedged between the feed lips, feed ramp, and bottom of the bolt carrier.
All of this leads me to believe that I am under gassed.
This is all on:
20 inch barrel
rifle length gas system
rifle buffer
rifle buffer spring
rifle buffer tube
M-16 style bolt carrier
Ideas?
I built up an AR over the winter and now that I have been able to get out to the range, there are some problems.
The symptoms I have (in the order I noticed them)
a) The bolt does not lock back on an empty magazine.
b) Sometimes the bolt does not pick up the next round (bolt closed on an empty chamber)
c) Steel cases only extract about 3/4 of the way (neck still in chamber, full stop)
d) sometimes I get the bolt ramming into the side of a round that is starting up out of the magazine putting a nice big dent in the side of the case.
a) and b) are clearly the bolt not moving far enough back.
c) might be not enough force on the bolt to extract the less slippery steel cases
d) I am not sure about, but it might be related to a) and b)
When I first test fired it (right before the big blizzard), it fired and ejected, but was effectively a single shot rifle... it wouldn't pick up the next round or lock back on empty. I lubed the crap out of it, and now it generally feeds multiple rounds but won't lock back. It also occasionally munches the side of a case it is feeding with it wedged between the feed lips, feed ramp, and bottom of the bolt carrier.
All of this leads me to believe that I am under gassed.
This is all on:
20 inch barrel
rifle length gas system
rifle buffer
rifle buffer spring
rifle buffer tube
M-16 style bolt carrier
Ideas?