A few months ago was asking questions about an AR9, an outstanding NES'r let me try a couple of his, started picking up parts and finally got to trying mine out today.
Is a Colt version, Spikes BCG, recievers, and 9mm buffer (the long one they make); BA 8 inch Barrel; Aero CH, rail, tube; JP polished spring; ALG ACT trigger; 4 inch KAW linear comp; and I stuck an SB brace on there. Running it on metalform 32 rnd mags.
In putting it together I ran into a problem where the ejector, not the tip just the top edge of it back near the bend, was hanging up the BCG. I got in touch w/ spikes and they indicated this is something that occurs and I should remove a little material - I did and insant joy.
I gave it a sanity headspace check, basically verified a no go gauge holds the bolt a little open and a go gauge isn't sloppy. Cleaned and lubed it up like any other AR and off I went..
It ran about 110 rounds today on federal FMJ 124 grain without failure (then kinda went bezerk and will get into that momentarily). My initial impression was I feel like the buffer is bottoming out in the tube, like maybe it wants a stiffer spring or a regular AR buffer to allow it more travel.
After about 110 rounds I got a stovepipe, followed a few shots later by a double feed, blamed it on a bad mag maybe (started with 4 loaded and was on the 4th at the time).. Loaded up another mag and got all types of malfunctions, stuff I don't have a name for including a sideways (vertical way) feed...
Obviously a cleaning and re-test is in order but I see nothing wrong mechanically here, is just how it started with a little residue mixed in. I do have a heavy spring here to try too.
Is there a special way to load colt AR9 mags? They do seem goofy to me, almost want to kinda spray rounds out or let the top one pop up, which could be totally negligent loading.
Any ideas of what else I ought to be chasing? Thx in advance!
Is a Colt version, Spikes BCG, recievers, and 9mm buffer (the long one they make); BA 8 inch Barrel; Aero CH, rail, tube; JP polished spring; ALG ACT trigger; 4 inch KAW linear comp; and I stuck an SB brace on there. Running it on metalform 32 rnd mags.
In putting it together I ran into a problem where the ejector, not the tip just the top edge of it back near the bend, was hanging up the BCG. I got in touch w/ spikes and they indicated this is something that occurs and I should remove a little material - I did and insant joy.
I gave it a sanity headspace check, basically verified a no go gauge holds the bolt a little open and a go gauge isn't sloppy. Cleaned and lubed it up like any other AR and off I went..
It ran about 110 rounds today on federal FMJ 124 grain without failure (then kinda went bezerk and will get into that momentarily). My initial impression was I feel like the buffer is bottoming out in the tube, like maybe it wants a stiffer spring or a regular AR buffer to allow it more travel.
After about 110 rounds I got a stovepipe, followed a few shots later by a double feed, blamed it on a bad mag maybe (started with 4 loaded and was on the 4th at the time).. Loaded up another mag and got all types of malfunctions, stuff I don't have a name for including a sideways (vertical way) feed...
Obviously a cleaning and re-test is in order but I see nothing wrong mechanically here, is just how it started with a little residue mixed in. I do have a heavy spring here to try too.
Is there a special way to load colt AR9 mags? They do seem goofy to me, almost want to kinda spray rounds out or let the top one pop up, which could be totally negligent loading.
Any ideas of what else I ought to be chasing? Thx in advance!
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