Today was a great day to get out to the range and enjoy the beginning of spring. It was only the 2nd time out for my new pet, and it shot flawlessly except for one bizarre instance I wonder if you guys could explain. About midway through the 2nd mag and somewhere once in the 3rd it fired when I reset the trigger, like just when it clicked without any significant travel. It's just a regular stock trigger with a measured 4.375 lb pull, totally unaltered and nothing fancy about it. Is there anything in particular that could cause this and is it something to fix now or will fix itself generally? Maybe I oiled it too much? I gave the bolt a fresh blast of CLP last night before shooting this afternoon.
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Odd AR trigger bug
- Thread starter Yellowfin
- Start date
Ridge_Runner_5
New member
Which brand lower? And if a factory gun, their parts kit?
You need a new trigger, hammer, and/or disconnector. One of them is worn and out of spec.
I recently had a similar problem on a new gun after the first 200 rounds I put through it. Started doubling.
Get a new FCG for it (cheap for stock replacement). 2 minute job to put it in.
I recently had a similar problem on a new gun after the first 200 rounds I put through it. Started doubling.
Get a new FCG for it (cheap for stock replacement). 2 minute job to put it in.
Ridge_Runner_5
New member
Check places like ar15.com
Lots of people put in aftermarket triggers, and then just throw out or sell the factory ones.
Lots of people put in aftermarket triggers, and then just throw out or sell the factory ones.
Unless you're the one who installed the FCG, then you're making an assumption. Many quasi-MilSpec AR-15 FGCs have heavier trigger pulls than you mentioned. Assemblers have been known to tweak the FCG for a lighter pull. Also, something as simple as a little bit of lint fuzz, from a cleaning rag, in the wrong place can prevent the sear from properly engaging (I've been there).It's just a regular stock trigger with a measured 4.375 lb pull, totally unaltered and nothing fancy about it.
As TRaGiK suggested, getting familiar with the operation of the FCG will help you analyze the problem. Of course, troubles with the standard FCG components may be an omen that you'd be happier with an custom drop-in FCG.
hoghunting
New member
Very nice offer, Wyo. Hope he contacts you.
I used to teach small arms repair at APG back in the days when the A2 was a new model. Of course back then only Colt and it's sub-contractors produced AR's and much has changed but our big problem was the FCG, we did not call it that. The biggest problem was keeping it clean, GI's had a tooth brush and a shaving brush in the field as cleaning tools neither would reach into clean the FCG worth a bleep. One dip in a rice paddy and the gun filled with muddy water and that water pooled in the lower reciever. Grains of earth would build up inside the FCG space and had to be rinsed out with water from a canteen!
As far as current civilian FCG production goes, I haven't a clue as to quality and fit but I'm sure alot of the stuff is imported from China and they don't give a dam about quality control.
As far as current civilian FCG production goes, I haven't a clue as to quality and fit but I'm sure alot of the stuff is imported from China and they don't give a dam about quality control.
Double Naught Spy
New member
You need a new trigger, hammer, and/or disconnector. One of them is worn and out of spec.
While it may have gotten out of spec, that does not mean that he needs a new trigger, but it certainly may. I had an AR smith work on mine, actually improved it, and it is now my hunting lower. Over the course of 2 range sessions, my gun had gone from normal to trigger pull fire/trigger release fire on most shots, to the line crossed from functional to of out of spec can be quite fine.
Also, I have seen blow primers get into the works and do all sorts of things when they become crunched between the parts. This fits with the oil and grease notion. A thorough inspection and cleaning might be a good start before replacing anything.
Nice offer Wyosmith.
I'm sure alot of the stuff is imported from China and they don't give a dam about quality control.
Most of us don't have a clue where a lot of stuff comes from, so it's hard to say exactly. However, as to quality control, the Chinese make Aimpoint and Eotech parts, in the same plant as three other import red dots. If Aimpoint and Eotech are liking and selling to Americans Chinese parts, and said Americans aren't complaining, maybe the Chinese do give a dam about quality control.
After all, the Koreans would snatch that contract up in a heartbeat.
The disconnector rides on the trigger pin and is pushed up with it's own spring to engage the sear. If the gun doubles, it was held down by grit, a burr, or debris. Clean it. Do not use heavy oils or grease, that make it worse as it will pick up more grit from the environment. Dusty ranges are more trouble than fouling.
There's not much in the TM about using more than a light coat of CLP to resist rust. Milspec is 6-8 pounds, measuring exactly 4.375 pounds doesn't lead to thinking it's a "regular stock trigger." How was that measured - and why?
Most of us don't have a clue where a lot of stuff comes from, so it's hard to say exactly. However, as to quality control, the Chinese make Aimpoint and Eotech parts, in the same plant as three other import red dots. If Aimpoint and Eotech are liking and selling to Americans Chinese parts, and said Americans aren't complaining, maybe the Chinese do give a dam about quality control.
After all, the Koreans would snatch that contract up in a heartbeat.
The disconnector rides on the trigger pin and is pushed up with it's own spring to engage the sear. If the gun doubles, it was held down by grit, a burr, or debris. Clean it. Do not use heavy oils or grease, that make it worse as it will pick up more grit from the environment. Dusty ranges are more trouble than fouling.
There's not much in the TM about using more than a light coat of CLP to resist rust. Milspec is 6-8 pounds, measuring exactly 4.375 pounds doesn't lead to thinking it's a "regular stock trigger." How was that measured - and why?