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The disconnector is the mechanism that catches the hammer when the trigger is depressed so the hammer does not "follow" the bolt carrier. It looks sort of like a "birds head" when viewed from the side and it fits down into the trigger proper and is retained by the trigger pin. It is spring loaded to catch the hammer(there is a thought-check the spring for proper tension or better yet, just replace it) If that spring is weak/damaged it may cause erratic function of the disconnector that a bench function check may not reveal. The G forces and inertia while firing may be enough to overcome the spring, resulting in "hammer follow" which could result in your tripling.
A piece of trash or such in the trigger/disconnector could also cause it to not engage properly.
Disconnectors have to be "timed" to operate properly. It is a "cut and try" process that can take some time to do properly and unless you are very familiar with the operation and relationship to the hammer you are best off not monkeying with it.
I sent you a PM - let me know and we can get together on it.
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I would start troubleshooting,by ordering another disconnector & spring;and maybe even another hammer.Brownells has the widest selection of AR-15 parts in the world.Don't forget to order there great catalog.Or you could order from Rock River,or DPMS.Rock River and Jt?,maybe having problems with hammer's breaking,with there match grades.I've broken two Rock River match grade hammer's,plus one JT? using a ceiner dedicated 22LR bolt.I know how you feel,being on the range;and having a gun double,or triple on you,like my dedicated 22 LR AR-15 did to me;till I finally found out that it was a dirty extractor. GOOD LUCK ! P.S. I use a mil spec hammer for my dedicated 22LR upper.
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doubling (or in your case, tripling) is almost exclusively a disconnector problem. Replace the disco, or file down the foot to increase its overlap with hammer.
to test:
with the rifle unloaded, hold back the trigger and cycle the charging handle.
VERY SLOWLY let off the trigger... if the hammer drops instead of falling to the trigger sear (you'll hear it if it happens), then the problem is the disconnector.
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so uh...doesn't sound like a problem, just make it so it empties the magazine instead of just 3 and then sell it at a gun show...using the gun show loop hole [Tooth]
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what trigger group you have there? is it a standard or aftermarket?
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To sum up a couple of questions:
I have a standard trigger group that came with the rifle.
The rifle is approximately 4 years old.
My shot groups are still tight.
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Furthermore I would point out that now that this gun does that I should ship it to Mexico since they are getting all the firearms from the US...Right?
And I really wish it wasn't a "problem" but I am still going to get it fixed.
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Clean or rebuild your bolt..change your disconnector (or get an aftermarket trigger group) - Guarantee to solve this issue.
