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  #1  
Old 09-07-2013, 8:40 PM
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shawn3210 shawn3210 is offline
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Default Ar15 help

Anyone near the Corona Eastvale area that can help me with my ar? I'm having issues with the casing getting jammed on ejection. It's a brand new ar that me and my buddy put together. I'm a new guy when it comes to guns so I'm lost right now. The ar would jam every other round. I was told to check the gas block and head spacing? Would like to have someone who is knowledgeable help me with this lol. Exchange for beer or cash?
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  #2  
Old 09-07-2013, 8:45 PM
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What ammo are you firing and what chamber does your rifle have? I am in Corona off Lincoln and Foothill, a bit south from eastvale.
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Old 09-08-2013, 11:57 AM
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Did you build the upper?
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Old 09-08-2013, 1:47 PM
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yea pics and more info would help. and I'm in south ontario on archibald near the eastvale border
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Old 09-08-2013, 9:29 PM
Norco Armory Norco Armory is offline
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Some things to check... BCG travel (it may be a short stroke problem). Head space might be a problem.. Make sure that the gas tube is installed correctly. I see a lot of incorrect gas tube installs at the shop. Also check buffer system. You can bring it into shop and I will put some eyes on it for free.. We do not charge for taking a look..
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Old 09-09-2013, 9:20 PM
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this is the build on the gun...
Lower:

-JL Bilet AR15 80% lower (170)
-Rock River lower parts kit with single stage trigger (67.95)
-MAGPUL ACS-L Mil-Spec Adaptable Carbine Stock (84.95)
-Mil Spec 6 position Stock Hardware Kit (42.95)
-Assault Planet Bullet Button (18.95)

Upper
-Spikes Tactical Barrel ST-16" 5.56 1/7 twist (199.99)
-Yankee Hill Machine Rifle Length Lightweight Free Float Rail (119)
-CMMG Gas Tube (15.95)
-YHM Low Profile Gas Block (22.95)
-Rock River Arms -A2 Flash Hider (7.50)
-JoeBobOutfitters Premium Complete Bolt Carrier Group and andronized charging handle (129.96)
Vortex SPARC Red Dot (199.99)
Upper: MEGA Forged Stripped*M4 Upper - A4 (114.00)
Upper Parts Kit Rainer (24.00)

My buddy helped me put everything together. We fired 50 rounds at the range and everything went smooth. Took it out a week later and it was jamming like crazy on ejection.
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Old 09-09-2013, 9:20 PM
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Quote:
Originally Posted by Norco Armory View Post
Some things to check... BCG travel (it may be a short stroke problem). Head space might be a problem.. Make sure that the gas tube is installed correctly. I see a lot of incorrect gas tube installs at the shop. Also check buffer system. You can bring it into shop and I will put some eyes on it for free.. We do not charge for taking a look..
thanks! I'll bring it by friday!
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Old 09-09-2013, 9:38 PM
norris45 norris45 is offline
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did you clean it? like really clean it?
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Old 09-09-2013, 9:59 PM
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Quote:
Originally Posted by shawn3210 View Post

My buddy helped me put everything together. We fired 50 rounds at the range and everything went smooth. Took it out a week later and it was jamming like crazy on ejection.
Okay so, when it started jamming, how exactly was it jamming?
Did you clean it and the chamber and the bolt after the 50 rd test fire?
Was it lubed really well?
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Old 09-10-2013, 4:42 PM
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More like...

Was the 2nd range trip a different ammo than the first range trip?
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Old 09-10-2013, 9:36 PM
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Didn't clean the gun after the first range trip....gun was well lubed though. Different ammo. First trip was with the rang ammo. Second trip pmc ammo.
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Old 09-10-2013, 9:37 PM
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It would jam on extraction of the casing, as the empty casing would leave it would sometime turn sideway and get jammed as a new bullet would enter the chamber.
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Old 09-10-2013, 9:59 PM
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Quote:
Originally Posted by shawn3210 View Post
It would jam on extraction of the casing, as the empty casing would leave it would sometime turn sideway and get jammed as a new bullet would enter the chamber.
Was the PMC X-Tac or the regular .223? You can do a quick check to verify the gas system is functioning correctly. Load 1 round into a magazine, when fired the BCG should lock back every time. You can do it ~10 times to make sure. If you get FTE at all, you can start at the gas system, otherwise move on.
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