Guns and Self-Defense > Guns/Firearms

AR-15 help

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Me:
  The first time I shot it, I used cheap Chinese ammo, which I could only get like three shots without it messing up. I have used Federal and Remington ammo since then, and it did better, but still messed up some.  It is a chrome-lined bore, and if it were polished that would probably fix it.  My friend has a Bushmaster and his shot the Chinese ammo with no problem.  The manual said not to use coated steel cartridges because the coating would melt and gum up(chinese ammo was regular brass), and not to use Israeli or Korean ammo, since it is mildly out of spec.
  Thanks for your help.  I just want to make sure that if my life depends on that rifle one day, it will work when I squeeze the trigger.

White Israelite:

--- Quote from: Caleb #72 on January 08, 2008, 09:17:51 PM ---  The first time I shot it, I used cheap Chinese ammo, which I could only get like three shots without it messing up. I have used Federal and Remington ammo since then, and it did better, but still messed up some.  It is a chrome-lined bore, and if it were polished that would probably fix it.  My friend has a Bushmaster and his shot the Chinese ammo with no problem.  The manual said not to use coated steel cartridges because the coating would melt and gum up(chinese ammo was regular brass), and not to use Israeli or Korean ammo, since it is mildly out of spec.
  Thanks for your help.  I just want to make sure that if my life depends on that rifle one day, it will work when I squeeze the trigger.

--- End quote ---

It wasn't wolf ammo was it? Wolf is steel cases with lacquer coating, not good. I think their new stuff uses polymer casings.

Edit: nvm

Highlander:
Sounds like a spring problem. Like Cohen said the magazine spring would explain the rifle failing to chamber a round. As for the forward assist problem, the receiver spring would definitely explain that. If its gotten weak it could fail to drive the bolt assembly all the way in.

ScottG1911:
In my opinion, DPMS weapons are about the worst you can buy besides Vulcan Arms.  You are probably having buffer problems if the bolt will not lock in battery.  as for it not cycling, what is most likely happening is the gas rod is defective.  A damaed gas rod will not push the bolt all the way back.  Thus the bolt is not even getting behind the cartridge to push it out the magazine.  stip you weapon and check to make sure the gas rod is ok, most likely it isn't

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