Larue trigger in MPX9

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[ARCHIVED THREAD] - Larue trigger in MPX9

Posted: 8/7/2016 9:13:27 PM EDT

I have an unfired mpx9 that I put a Larue trigger in.
Sig has mention of the "trigger bridge" extra piece they have in there as factory, and to not change the trigger, etc...
It seems that the trigger bridge (add on piece) will NOT go in place with the Larue.
Anyone else have this issue? Is it an issue to not have the bridge in place and just place the trigger in (as I have on ARs)?
All seemed to cycle, reset fine when dry firing without the bridge.
Thanks!

Posted: 8/7/2016 9:56:59 PM EDT

[#1]

wondering the same thing

Posted: 8/8/2016 12:23:30 AM EDT

[#2]

Bridge will not go in with the LaRue MBT. No problems with mine in now over 1000rds fired using the MBT. Makes it much more pleasant to shoot. Absolutely no problems with the MBT so far, and I don't anticipate any.

Posted: 8/8/2016 9:45:54 AM EDT

[#3]

i wonder if it voids sig or larue warantee if you use since no bridge?

Posted: 8/8/2016 10:12:31 AM EDT

[#4]

Quote History

Quoted:
i wonder if it voids sig or larue warantee if you use since no bridge?

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Mr geissele said he would stand by his if anything happened to it while running it in the MPX with no bridge. I've got 1000's of rounds on my S3G with no issues. There is a sig video out addressing this as well.

Eta video. Trigger discussion at 4:45

MPX FAQ

Posted: 8/8/2016 10:43:49 AM EDT

[#5]

does mr geissele mean alg ? some of geissele triggers are so light. is there a heavier geissele trigger ?

Posted: 8/8/2016 11:00:32 AM EDT

[#6]

Quote History

Quoted:
does mr geissele mean alg ? some of geissele triggers are so light. is there a heavier geissele trigger ?

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Just find the cheapest Geissele, but in this rifle a lighter trigger feels perfect. I use an SD-E and I like it a lot.

Posted: 8/8/2016 11:06:33 AM EDT

[#7]

My understanding: The bridge was to reduce trigger slap with the original SIG trigger. SIG now says an aftermarket trigger does not void the warrantee.

http://www.stevejenkins.com/blog/2015/06/will-upgrading-the-sig-sauer-mpx-to-an-ar-15-trigger-void-your-warranty/

Posted: 8/8/2016 8:18:26 PM EDT

[#8]

Good to hear. My Sig book stated that aftermarket would void the warranty. I wasn't worried about that, but I was worried about the MBT not functioning in it without the bridge.
Thanks.

Posted Via AR15.Com Mobile

Posted: 8/8/2016 8:39:30 PM EDT

[#9]

Sig now says no problem.

I asked Larue in Industry and he said no problem. If I could break it in the MPX he would send me a new one.

Posted: 8/10/2016 3:43:03 AM EDT

[#10]

Quote History

Quoted:
Sig now says no problem.

I asked Larue in Industry and he said no problem. If I could break it in the MPX he would send me a new one.

View Quote

I'm hoping you got enough ammo money for a comprehensive test.

Posted: 8/10/2016 7:25:22 PM EDT

[#11]

Quote History

Quoted:
I'm hoping you got enough ammo money for a comprehensive test.

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Quote History

Quoted:

Quoted:

Sig now says no problem.
I asked Larue in Industry and he said no problem. If I could break it in the MPX he would send me a new one.

I'm hoping you got enough ammo money for a comprehensive test.

I have a NIB Sig MPX 9, you provide the ammo & trigger, I'll provide the rifle. You can blow my rifle up, and replace it with a PredatOBR 7.62. That's a really, really fair trade. I see your

, and raise you a

.

Posted: 8/12/2016 11:06:23 PM EDT

[#12]

Quote History

Quoted:
I have a NIB Sig MPX 9, you provide the ammo & trigger, I'll provide the rifle. You can blow my rifle up, and replace it with a PredatOBR 7.62. That's a really, really fair trade. I see your

, and raise you a

.

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Quote History

Quoted:

Quoted:
Sig now says no problem.

I asked Larue in Industry and he said no problem. If I could break it in the MPX he would send me a new one.

I'm hoping you got enough ammo money for a comprehensive test.

I have a NIB Sig MPX 9, you provide the ammo & trigger, I'll provide the rifle. You can blow my rifle up, and replace it with a PredatOBR 7.62. That's a really, really fair trade. I see your

, and raise you a

.

That sounds like a deal to me as well!
My third MBT that I put in the MPX9....I haven't shot it yet, but it feels great, as the others!

Posted: 8/31/2016 8:19:20 AM EDT

[#13]

I was going to order a MBT-2S last night, but thought I'd send an email to Larue asking if it would work first. (I hadn't read this thread) To my surprise the response I got back from Larue's tech support was NO!! So which is it? Will the MBT-2S work in my Sig MPX or won't it, and will Larue warranty it if it breaks?

Posted: 8/31/2016 8:33:01 AM EDT

[#14]

Has anyone tried a CMC trigger?

Posted: 9/1/2016 3:03:21 AM EDT

[#15]

Quote History

Quoted:
Has anyone tried a CMC trigger?

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Wondering the same thing

Posted: 9/1/2016 3:06:57 AM EDT

[#16]

buddy dropped a MBT in his mpx and it runs like a top.

I need to pick one up for my new M&P 15-22

Posted: 9/1/2016 6:25:20 AM EDT

[#17]

Quote History

Quoted:
I was going to order a MBT-2S last night, but thought I'd send an email to Larue asking if it would work first. (I hadn't read this thread) To my surprise the response I got back from Larue's tech support was NO!! So which is it? Will the MBT-2S work in my Sig MPX or won't it, and will Larue warranty it if it breaks?

View Quote View All Quotes

View All Quotes

Quote History

Quoted:
I was going to order a MBT-2S last night, but thought I'd send an email to Larue asking if it would work first. (I hadn't read this thread) To my surprise the response I got back from Larue's tech support was NO!! So which is it? Will the MBT-2S work in my Sig MPX or won't it, and will Larue warranty it if it breaks?

Quoted:
buddy dropped a MBT in his mpx and it runs like a top.

I need to pick one up for my new M&P 15-22

And we're trying to get someone to break an MBT in an MPX, so let us know if you're successful.

Posted: 9/1/2016 10:22:30 AM EDT

[#18]

The bridge is necessary on full auto, without it trigger slap is tremendous. There's some other FCG group work that needs to be done for select fire, and the MPX is much more abusive than an AR-15 to the components.

Compatibility isn't as much of an issue as when things will break--- good quality parts should hold up fine, but something that is built for an AR and not overly tough may choke on an MPX after a significant round count. I have indeed snapped a hammer in an MPX... and beaten the crud out of components. Once you start playing with the fun versions of the MPX, you realize quickly how brutal they are to the FCG.

Posted: 9/1/2016 11:15:40 AM EDT

[#19]

From my guy Dan ...

A reviewer wrote:

SIG’s current position on aftermarket triggers is different than originally stated in the SIG rep’s alert. SIG now says that the short answer is “yes, and aftermarket trigger assembly will fit and it will function into (sic) the MPX Gen 1 or Gen 2. The trigger hole locations are the same as a standard AR-15. The trigger will fit and function as it would in any other AR-15 platform.”

SIG’s position (as it should be) is that aftermarket triggers do not void the warranty on an MPX. However, “it may cause damage to the aftermarket trigger assembly, and that SIG Sauer cannot guarantee.”

Of course, we will stand behind our trigger like it’s Kate Upton in a thong (that is sig line material there).

View Quote

Posted: 9/1/2016 7:58:47 PM EDT

[#20]

As I suspected, one ordered!!

Posted: 9/2/2016 1:40:43 AM EDT

[#21]

Quote History

Quoted:
Compatibility isn't as much of an issue as when things will break--- good quality parts should hold up fine, but something that is built for an AR and not overly tough may choke on an MPX after a significant round count. I have indeed snapped a hammer in an MPX... and beaten the crud out of components. Once you start playing with the fun versions of the MPX, you realize quickly how brutal they are to the FCG.

View Quote

Fortunately and unfortunately, ill never know

Posted: 9/5/2016 5:25:59 AM EDT

[#22]

Quote History

Quoted:

Mr geissele said he would stand by his if anything happened to it while running it in the MPX with no bridge. I've got 1000's of rounds on my S3G with no issues. There is a sig video out addressing this as well.

Eta video. Trigger discussion at 4:45

https://www.youtube.com/watch?v=Tp7WmEPyu_k
MPX FAQ

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Quote History

Quoted:

Quoted:
i wonder if it voids sig or larue warantee if you use since no bridge?

Mr geissele said he would stand by his if anything happened to it while running it in the MPX with no bridge. I've got 1000's of rounds on my S3G with no issues. There is a sig video out addressing this as well.

Eta video. Trigger discussion at 4:45

https://www.youtube.com/watch?v=Tp7WmEPyu_k
MPX FAQ

good to know..i have an SD3G I've been wanting to put in mine.

Posted: 10/11/2016 9:29:25 AM EDT

[#23]

at least 1000 rounds with the larue trigger no problems.

makes it much more accurate offhand, no more jerking that stock trigger nice clean break

Posted: 10/12/2016 1:57:25 PM EDT

[#24]

Put around 100-150 rounds through my MPX with Larue. Handled great (like the ones on my AR). Will order another for the MCX pistol which is on the way for a "truck gun".