m11/9 shoots semi when set to auto

[D-boy]

My M11 has started shooting semi once in a while when set to auto. And, lately, it seems more frequent. Putting lube in wrong area? Needs better cleaning? I am assuming I need to replace some parts, please advise. Thanks!

 

[FTB1-SS]

try this thread... your problem could be any number of things.
http://www.uzitalk.com/forums/showthread.php?t=38462

 

[MrM4]

Do you have more than 1 bullet in the Magazine? :jester

 

[chili17]

take the trip out and throw it away. that will probably solve your problems

 

[surefire]

take the trip out and throw it away. that will probably solve your problems

I agree, unless you want semi auto, take the trip out. At least then you can rule it out.

 

[Vegas SMG]

take the trip out and throw it away. that will probably solve your problems

While I didn't throw it away, I'd be hard pressed to locate my trip. Of course with the MAX-11 upper, singles are easy to pull and I don't need the semi setting.

Yank the trip!
__________________
If you think health care is expensive now, wait until you see what it costs when it's free! -P.J. O'Rourke

 

[D-boy]

Thanks again, guys. I figured I would replace all of the lower parts rather than trying one at a time since I will probably need some spare parts anyway. I told Richard Lage I wanted all of the lower fire control parts but no extended safety since I don't use the safety. He gave me the following list, and I think he also gave me his acquisition costs by accident but I won't post that LOL.

Will I need all of these parts eventually? Is it likely I will need to replace the pins and the trigger, for instance?

Thanks!

M-11 Hardened Sear


$ 49.99

Safety Detent (5/32 Bearing)


$ 3.25

Safety Spring


$ 3.25

Trigger


$ 29.50

Disconnector


$ 19.99

Disconnector Roll Pin


$ 3.00

Trigger Spring


$ 17.50

Trigger Pin


$ 12.00

Selector/Sear Pin


$ 39.50

Trip


$ 18.00

Sear Spring


$ 9.00

Trigger Pin Retaining Spring


$ 12.00

 

[D-boy]

OK guys, please see if you can help me with the question in my post just above this one. My Lage is coming...

Thanks!

 

[Vegas SMG]

I wouldn't replace every part in the gun searching for the problem that many owners have experienced. You're chasing a ghost, and in the end, you'll never know what the underlying problem was and needlessly spent a lot of money in the process. Please do yourself a favor and try removing the trip to see if that cures your problem. It costs nothing, takes just a couple of minutes, and no tools are required. Trip removal cures most people's burst firing such as what you're experiencing.

On your parts list, a hardened sear wouldn't be a bad idea and the selector/sear pins sometimes break. I highly recommend the Lage extended safety because you actually use it. I have to wonder why you're asking about the safety components if you have no intention of using this feature anyway. :thinking
__________________
If you think health care is expensive now, wait until you see what it costs when it's free! -P.J. O'Rourke

 

[D-boy]

I appreciate the information in the first two sentences of your second paragraph, thanks! :goofygrin

 

[Block Head]

As Vegas and others have said, try removing the trip to see if the gun runs in full auto. If so and you'd like to fix the issue, you're probably going to need to fit the trip to the gun. I think the cause of your problem (and many other trip problems) is that the trip is too tall and is being hit by the bolt even when the selector is in SMG. When the trip is activated, it pushes up on the disconnector and allows the sear to catch the bolt. After disaasembling your gun, look at the top of the trip. See the angled surface that is contacted by the bolt? That's where you're going to need to remove material. It doesn't take much, esp. if your problem is only intermitent. If you take off too much, the trip will be too low in SEMI and you'll lose semi-auto function. Fortunately, a trip only costs $18. So, if you blow it the first time, it's cheap to start over and try again.

BH

 

[Block Head]

Oh, BTW, I second Vegas' recommendation on the hardened sear. Buy one from Richard. His are case-hardened and work great. Don't bother fitting your trip until you replace the sear. I'd buy a second one with the sear just in case you end up needed it.

BH

 

[D-boy]

OK guys, you finally got through my thick skull. Thanks

As stated, I want to buy more replacement parts than are needed fix this problem. And I didn't want to spend time screwing around with it. But you are right, of course, if I fix my trip then I end up with a new trip and sear as replacement parts instead of new parts in the gun and questionable replacements in a plastic bag. I won't spend much time at it but it's worth a shot.

I shoot at my property but only semi. Also, I like to shoot a few shots in semi at the range. But not when I don't expect them

 

[Mr.Burns]

I agree, unless you want semi auto, take the trip out. At least then you can rule it out.

Hey Surefire please email me or pm me, I am still waiting for my Mac 10 parts and the threaded glock 17 barrel that I ordered from you over a month ago! Your web site appears to be down and I can't find your number so please email me at jeffncarla@sbcglobal.net. Thanks Jeff

 

[USMG]

you ordered it on 10/09 and the barrel is back ordered so i will send out the rest of your order tomorrow. The site was down briefly yesterday to put up our new site. The old URL will be back up again and revert over to the new site.