Lage Upper ignoring selector switch?

[Phanatic]

Hello, folks.

A little while ago I picked up a M10/9. Seems to be one of the double-stamp guns, Powder Springs on the right but an RPB stamp on the left side.

https://i.imgur.com/lUqWb9c.jpg

Anyway, it functioned fine (well, one of the three mags I got with it just plain doesn't feed at all, but the gun itself worked fine.

Got around to going the standard Lage route (MAX-10/9 mk2) and changed things a bit:

https://farm2.staticflickr.com/1927/45381778655_90107f893d_c.jpg

Thing's great. With a real stock and the slower ROF, it's entirely controllable. Rest assured a silencer's on order.

Here's my problem. With the Lage upper on, the position of the selector switch makes no difference in operation. Semi, Full, makes no difference, the thing fires in full auto. Now, on the Lage website they address this issue as a FAQ:

"Why doesn't my gun shoot Semi-auto when I move the selector to "Semi"?

The issue you are experiencing with the selector may actually be caused by the previous owner uninstalling the trip or installing it incorrectly. If you simply take out the trip, then your gun will run full-auto all the time whether you have the selector on semi or full. You can purchase a new Trip HERE (towards the middle of the page) . Also, check if your Sear has been modified."

But with the original upper on it, the selector switch operates normally, so the trip must be present. With the Lage upper, it does not. And as near as I can tell, changing the upper doesn't do a single thing tothe fire control group.

Anyone have any advice for how to get the selector working with the Max-10, or any idea what's going on here?

 

[Battering ram NIB]

I’d email Richard with pics of your lower and upper

Other than sighting in a red dot I
Wouldn’t even know. I never shoot semi

I wouldn’t care if it were me.

Richard will help you. Good service !!

 

[gt3499a]

it's going to be the interface between your trip and the front edge of the bolt. maybe the trip is bent down. try rotating to semi while the upper is off, press down the trip until it disengages the trigger, measure that height relative to the front pin hole. then you can measure the two bolts from the 2 uppers to their take down pin holes

or you can take a picture of the lower internals and post it. maybe the trip has worn down over time

 

[Phanatic]

or you can take a picture of the lower internals and post it. maybe the trip has worn down over time

Thanks for the advice. Here are some pics.

Selector set to semi:
https://i.imgur.com/fxuEyi8.jpg

Set to full:
https://i.imgur.com/5zLOeSg.jpg

Semi:
https://i.imgur.com/XBExirY.jpg

Full:
https://i.imgur.com/UlTWssP.jpg

Does anything look obviously, grotesquely wrong there?

While we're at it, what would be a good book to pick up from a detailed mechanical/operational point of view? My understanding of "The Mac Man" is that it's a comprehensive history but not anything like a repair manual. Is there anything that's a step up from just the original manufacturer's manual with its one exploded diagram?

 

[LawBob]

Thanks for the advice. Here are some pics.

Selector set to semi:
https://i.imgur.com/fxuEyi8.jpg

Set to full:
https://i.imgur.com/5zLOeSg.jpg

Semi:
https://i.imgur.com/XBExirY.jpg

Full:
https://i.imgur.com/UlTWssP.jpg

Does anything look obviously, grotesquely wrong there?



While we're at it, what would be a good book to pick up from a detailed mechanical/operational point of view? My understanding of "The Mac Man" is that it's a comprehensive history but not anything like a repair manual. Is there anything that's a step up from just the original manufacturer's manual with its one exploded diagram?

I have to look at other pics but your trip seems compact
To me

Like the length. I could be wrong.

 

[LawBob]

Nope I’m high.

 

[theduke]

Check this place https://www.mac-11.info/trouble.htm#5

Look around on the site ^ you will see lots of info.

Also check the Lage site...lots of videos and related info to be found.

 

[lokifox]

Mine did the same thing. Unbent the trip a hair and solved the problem forever.

 

[Offmarksman]

The Most likely culprit is an out of spec trip. Get a new one and try it. It’s always good to have spare parts anyways. Most take the trips out, and leave them out, as they tend to cause problems. Besides, what fun is shooting your Mac in semi anyway? Rock and Roll!!!

 

[TSPC]

What is this "semi-auto" that you guys are talking about?

 

[Vegas SMG]

What is this "semi-auto" that you guys are talking about?

^Correct answer right here!
Who spends many thousands of dollars on a crappy sheetmetal gun, waits a year to take physical possession, spends thousands more on accessories and then proceeds to shoot it in semi?! A slow fire upper or bolt allows you to pull singles at will. I’m tripless.

 

[ccosby]

What is this "semi-auto" that you guys are talking about?

Its the mode you use to zero the gun and then ignore.


Mine still has semi on it(and my pending ones will keep it as well) for when I let other people shoot it. I'll load the gun with like 5 or 6 rounds and put it in semi. Let them shoot a shot or two in semi before switching to full auto so they can get an idea of the recoil. That way too if they walk it up in full auto its running out quick. They had that ok and they can have a fully loaded mag.

 

[challenger70rt]

I have a similar issue w my 10/31. I originally believed it to be because the front pin hole was drilled slightly too high on my gun, because the fitament is not perfect, and this was causing the bolt to not consistently hit the trip in s/a (I usually get 3-4) rd bursts in semi. The weird thing is I have other uppers oem, and Lage mk1 and they work perfectly. Additionally my friends 10/31 does the exact same thing as mine. I don’t really give a shit though, cuz I mostly shoot them fa anyway. Hell with the Lage uppers I can easily pull singles in fa anyway.

 

[lokifox]

I don’t think the 31 uppers function in semi.

 

[Gemlin]

My lage MAX-10/9 mk2 fires only semi when I put the selector on semi and auto when I put it on auto.

 

[Phanatic]

^Correct answer right here!
Who spends many thousands of dollars on a crappy sheetmetal gun, waits a year to take physical possession, spends thousands more on accessories and then proceeds to shoot it in semi?! A slow fire upper or bolt allows you to pull singles at will. I’m tripless.

I spent many thousands of dollars on the gun and another thousand on accessories and I want it to function nominally. That includes the selector switch. That includes the safety switch, even if I'm never going to use it. Also this:

Its the mode you use to zero the gun and then ignore.

C'mon, if you bought a brand new car and then something like the AM radio didn't work, you'd go back to the dealer and say "Fix the radio," even if you never in a million years listen to AM radio.

Mine did the same thing. Unbent the trip a hair and solved the problem forever.

Can you describe what you mean? Unbent it in what fashion?

 

[plodder]

Nope I’m high.

Law: I didn't know Cannabis had been legalized in TX yet. Nonetheless, you should refrain from posting while under the influence.

 

[LawBob]

I spent many thousands of dollars on the gun and another thousand on accessories and I want it to function nominally. That includes the selector switch. That includes the safety switch, even if I'm never going to use it. Also this:



C'mon, if you bought a brand new car and then something like the AM radio didn't work, you'd go back to the dealer and say "Fix the radio," even if you never in a million years listen to AM radio.



Can you describe what you mean? Unbent it in what fashion?

Good points.

And if you put a different engine in your car I don’t think you could take it back to the dealer and say why doesn’t it work

 

[Vegas SMG]

I understand, I truly do.

I just counted, and over the years I’ve owned ten full auto MACs in all flavors. The only one I haven’t owned is the small mag well .380, so my view of these guns is probably different than most. I belive I see them for what they really are. An extremely expensive but poorly made sheet metal gun with a stamped sheet metal trip.

Some forum members shoot matches at the local, state, and national level. Trips, especially in the M-11/9, can and do cause reliability issues. In a game where mere thousands of a second matter, reliability is a must. Most guys will pick reliability over a select fire option. Yes, it’s possible to have both, but I’m not taking the risk of a malfunction and I’ll bet those who are successful have eliminated their trip.

Yes, I’d want my AM radio to work on a new vehicle, and would absolutely would have it replaced under factory warranty. If the warranty had expired? Not gonna happen, same with the trip, and I won’t miss either one.

Study how your trip works and bend slightly to raise the height so the bolt contacts the trip and acts on the disconnector.