Finally got a chance to take one of my ar15s out and it wont run.
Heres the deal. BCI lower with cmmg parts kit and mil spec trigger. Complete BCA 18" upper with 1:7 twist 223 wylde barrel. Cant remember for sure what brand bcg but i believe toolcraft and the charging handle is a cheapo ambi handle.
So what happens is i pull charging handle back and let her rip. Chambers round and fires first shot. It chambers next round but bcg wont go all the way into battery. Roughly 1/2" short. Forward assist will not push the bcg into full battery, and pulling on charging handle cannot be done. It has to be lightly tapped with rubber mallet to pull charging handle back. I can slam buttstock on ground and it will go full battery and fire round. Only did this twice. When testing with spent case doesnt matter if its 223 or 556 or steel v/s brass. They all act the same.
If i seperate upper from lower and with no round the bcg slides right down to fully closed under its own weight. Same with upper and lower pinned together. So not a gas tube alignment issue i dont believe. If i stick a spent casing in the chamber the bcg will not go fully forward unless i let the charging handle go as intended, but then have to use the mallet to pull charging handle back to eject casing.
What i have done is swapped complete lowers, bcg and charging handles and still same issue. One thing i noticed is there is some drag with the cheapo handle in the upper and when i swap with a strike industries that one doesn't drag but still same issue.
Im guessing slightly out of spec upper but not 100% positive. With no round in chamber the bcg goes right on down under its own weight so not sure that it would be a barrel extension issue.
Anyone got any ideas what the issue could be?
This was a cheapo build with stuff i had lying around other than the complete bca upper.
If you need a pic to help me out please let me know what youd like a pic of and I'll happily take one and post it.
I've put together pretty much every ar i own from scratch, including complete upper assembly and never had issues. This is the only complete factory upper I've ever bought and consequently the only one ive had issues with...go figure
Any help or ideas/ thoughts would be greatly appreciated.
Thanks in advance INGO!
Heres the deal. BCI lower with cmmg parts kit and mil spec trigger. Complete BCA 18" upper with 1:7 twist 223 wylde barrel. Cant remember for sure what brand bcg but i believe toolcraft and the charging handle is a cheapo ambi handle.
So what happens is i pull charging handle back and let her rip. Chambers round and fires first shot. It chambers next round but bcg wont go all the way into battery. Roughly 1/2" short. Forward assist will not push the bcg into full battery, and pulling on charging handle cannot be done. It has to be lightly tapped with rubber mallet to pull charging handle back. I can slam buttstock on ground and it will go full battery and fire round. Only did this twice. When testing with spent case doesnt matter if its 223 or 556 or steel v/s brass. They all act the same.
If i seperate upper from lower and with no round the bcg slides right down to fully closed under its own weight. Same with upper and lower pinned together. So not a gas tube alignment issue i dont believe. If i stick a spent casing in the chamber the bcg will not go fully forward unless i let the charging handle go as intended, but then have to use the mallet to pull charging handle back to eject casing.
What i have done is swapped complete lowers, bcg and charging handles and still same issue. One thing i noticed is there is some drag with the cheapo handle in the upper and when i swap with a strike industries that one doesn't drag but still same issue.
Im guessing slightly out of spec upper but not 100% positive. With no round in chamber the bcg goes right on down under its own weight so not sure that it would be a barrel extension issue.
Anyone got any ideas what the issue could be?
This was a cheapo build with stuff i had lying around other than the complete bca upper.
If you need a pic to help me out please let me know what youd like a pic of and I'll happily take one and post it.
I've put together pretty much every ar i own from scratch, including complete upper assembly and never had issues. This is the only complete factory upper I've ever bought and consequently the only one ive had issues with...go figure
Any help or ideas/ thoughts would be greatly appreciated.
Thanks in advance INGO!