doubles and triples in the AR

[Steve Ladino]

Thank you everyone......I will pas these opinions on to one of the persons mentioned above.

 

[Leo Smith]

Sounds like a Trigger that is too light on pull. Maybe adjusted incorrectly.

 

[Charles]

Had the same problem i was using a upper with a suppressor changed to another upper with out suppressor and solved the problem

 

[Tommie]

Last summer a buddy let me try out his AR during a PD shoot. Twice it doubled on me. Yuck. He never had an issue while shooting it. Obviously I was doing something wrong. Never liked AR’s and probably never will.

 

[Deleted outa08]

First thing I would check is the firing pin. Make sure it is free to move and not stuck forward.

Thanks ,I`ll go check that right now. Jeff

 

[Txhillbilly]

Some of the drop in cartridge style triggers have two set screws that need to be tightened down to the lower receiver. If you don't tighten these set screws down,you can/will get doubles and triples.

 

[Coyotefurharvester]

Back in 91-92 , a friend had an AR built. We single shot loaded it during sight in. Decided we better have the new rifle with for a pd trip. Pulled up in a private land pasture, I told my buddy shoot some close ones before I setup tables. I was spotting with binos, 3 on a mound about 90 yards away. My buddy shoots, I hear brass hit the windshield, 2 go down my tee shirt collar. Ouch,ouch had 2 nice burns after throwing the door open and hitting dirt trying to clear the brass. We shot it some, once in awhile it would run three. Most times normal function. It did it once that winter hunting fox, my buddy decided intermittent auto burst not a good thing. The person who assembled it, fixed the issue, never told my buddy what was the issue.

 

[TAJ45]

Back in 91-92 , The person who assembled it, fixed the issue, never told my buddy what was the issue.

Prob CYA for himself.

 

[Mark W]

Mine started throwing doubles and triples after I changed the trigger to a Geissele SSA-E. I had to gunsmiths check it and both said nothing was wrong. Eventually I had to opportunity to let a guy at my gun club shoot it and it worked perfectly for him. Turns out I was holding it loose and basically doing the bump stock thing unintentionally.

 

[6ShotsOr5?]

The A/R triggers that are prone to doubling (or more) occur mostly with the triggers that allow adjustment and when you go too far with the sear engagement - you will get it. I've done it with three different makes of triggers. From my experience - anytime you try to set well below two pounds in an A/R, you are risking doubles with any trigger due to recoil-induced jarring. At two and above - the recoil doesn't hamper as much.

+1 on the adjustable issue. Mine was an issue with a disconnector that worked fine for awhile but loctite wasn’t doing the job for me. Switched to non-adjustable mainly SSA-E and no more trouble. I think the loctite wasn’t fresh and I didn’t get a good set, but that’s just another lesson learned. Probably more my fault than anything to do with the adjustable trigger.

 

[jamesh]

I had that issue with a Jewel trigger. I was shooting for group and squeezing the trigger very gently. The recoil was enough to reset the trigger and fire another shot. My groups weren’t very good and I went to a heavier trigger. It’s not fun when you don’t expect it.

I've had that happen with a Jard trigger but only when shooting free recoil from a bench and never more than two shots.

 

[Wooly]

I have observed a couple guys who's AR 15's doubled and triple fired by accident,. Besides less than minimum sear engagement is there some other cause like to much lube on the bolt etc. that causes this ?

I had that problem a while back. The rifle had not been modified. I used some Bench Rest primers. The firing pin in an AR is inertia driven. Thin primer cups were causing some slam fires.

Switched to primers designed for the AR and never had another problem.

 

[Bill K]

Two things are the major reasons for multi fires on a standard AR. Wrong primer which can allow slam fires on bolt going into locked position or trigger in need of adjustment or cleaning.

 

[T-shooter]

I went with a titanium firing pin to advert any potential problems. I did some test below.

Letting the bolt slam shut on new Federal primers, the titanium pin left a much smaller dent in the primer. I did the stock steel pin once, then 5 times on another primer. It didn't go off. Then I fired it for comparison.

 

[Dusty Stevens]

Remember, the only way an AR can go full auto is a bump stock. They are bad so they banned them. All is good now

 

[Fast14riot]

I had my Jewell get out of adjustment during a match and it went binary. Another common one I've seen is the "grip bolt trigger adjustement" where a set screw is threaded in ahead of the grip bolt to push up on the trigger tail reducing sear engagement.

 

[people]

It can happen easily when squeezing the trigger very slow. Your finger basically becomes the "Bump stock".

 

[swd]

It’s all fun and games until ATF shows up, lol