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Armalite AR-10T Help!

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9 years 5 months ago #45114 by charliewalker07
Armalite AR-10T Help! was created by charliewalker07
Just bought a slightly used Armalite Ar-10t from a gunshow. I took it out to shoot and its having trouble loading shells. The gun isnt dirty and theres no defects that i can see. Sometimes it wont eject but for the most part I just have to maunually load the next round. Any help is appreciated! Thanks!

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9 years 5 months ago #45115 by jtallen83
Replied by jtallen83 on topic Armalite AR-10T Help!
:welcome: Sorry to hear your having issues. Maybe a few more questions and we can start helping diagnose the problem.
What type of ammo?
Did you break the weapon down and give it a good cleaning yourself or did it come clean?
When you say manually load does that mean from the magazine or are you putting the round into the chamber?
Not knowing the round count you may want to put a spring package in it-extractor, ejector, buffer........

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9 years 5 months ago - 9 years 5 months ago #45117 by Siscowet
Replied by Siscowet on topic Armalite AR-10T Help!
Welcome,
1. If you have more than one magazine, try the second one. Also, is it an "A" or a "B" model? Defective magazines are the most common cause For failure to feed.
2. Any marks, dents, or gouges on the ejected cases? Any scrapes on the case in the magazine falling to load into the breech?
3. Is it a stock Armalite fixed gas block? If it is, I doubt that is the issue. If it is after market, that might be a problem.
4. Is the buffer assembly the stock Armalite? It sounds like your BCG is not traveling fully out of battery. Either from too much buffer resistance, not enough gas reaching the BCG to fully cycle, or friction on the BCG from tight tolerances. Lubing the dickens out of the BCG and shooting 50-75 rounds would solve the last problem, which actually is fairly common with new AR's, especially ones built to tight tolerances like the AR10T.
5. Last, what ammo are you using? Whatever it is, try something else, particularly if it is almost new. It takes about 200 rounds to break in an AR10T. I suggest M-80 147 grain as a minimum, and even better, something around 168-175 grain. That is what it was designed for.
If none of these work, contact Armalite tech support. It might be a something like a misaligned gas port with the gas block, which is something they should take care of.
Last edit: 9 years 5 months ago by Siscowet.

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9 years 5 months ago #45118 by jtallen83
Replied by jtallen83 on topic Armalite AR-10T Help!
Here is a handy tech note on malfunctions from ArmaLite;

www.armalite.com/images/Tech%20Notes/201...0REV%200%20_I-4_.pdf

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9 years 5 months ago #45119 by Libertarian623
Replied by Libertarian623 on topic Armalite AR-10T Help!
Oil me baby. If we could just have people dip the upper and lower receivers it would solve a lot of problems. You really don't have a definitive number (round count) when you buy used. It may have less than 20 rounds through it. If that's the case copious lube would be on order. Along with a total breakdown and cleaning ( a must for any weapon you are new to) Then the answering of the diagnostic questions will be important. Sisco did a good job outlining the frequent causes of problems. Anyway we are here, lets get to it. Summer is wasting away as we speak.

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9 years 5 months ago - 9 years 5 months ago #45127 by charliewalker07
Replied by charliewalker07 on topic Armalite AR-10T Help!
Thanks for the tips! The gun is pretty clean but dry. I'll get some oil and lube it up, then take it out this weekend. Thanks for the help and I'll let you know how it works!
Last edit: 9 years 5 months ago by charliewalker07.

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9 years 5 months ago - 9 years 5 months ago #45134 by Siscowet
Replied by Siscowet on topic Armalite AR-10T Help!
Good luck. The troubleshooting :wave: sequence I would try would be:
1. Lube it up good, I mean really sloppy with a good oil or grease especially the bolt carrier group and try 40 rounds.
2. If still having problems, change ammo and try a different weight and cartridge manufacturer.
3. If persists, try a new magazine.
4. If it persists, try hand cycling a whole magazine to see if cartridges properly load and eject by hand. Inspect the bolt for any obvious wear marks or anything like that.
5. If it persists, start thinking Armalite tech support.
Last edit: 9 years 5 months ago by Siscowet.
The following user(s) said Thank You: Libertarian623

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9 years 5 months ago #45180 by OleCowboy
Replied by OleCowboy on topic Armalite AR-10T Help!
When you have any issue with a weapon, be it new, used but new to you and it 'never did this before' always think "basics', look for the simple solution, like other have said: Lube, mag, clean, ammo (in no order as each should be looked at every time you go to shoot.

Most of the time one or or some of those will raise its ugly head as the issue to be mitigated. All to often not matter the problem folks seem to want the most complex answer to the simplest problem.

Computer acting up: REBOOT, works in over 60% of all cases.

My daddy taught me at a rather young age when I could not get the old Ford tractor started one day. He said son there are only 3 things that can go wrong: Fuel, electrical, mechanical. Are you getting fuel, too much, not enough, Spark plugs sparking, does it sound like something mechanical is broken? Now go out there and fix that tractor. I did, float was stuck on the carb. That approach has saved my bacon a lot of times in life.

Especially beneficial for me, I am not a smart man, I am Infantry...

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