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Discussion Starter #1
Is there a way to use class 3 sear with a new 4 pos picto lower? Or, is the SEF trigger pack the only way to go?
 

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You can install a sear into any lower... It just may require a competent smith to do the work, especially in a burst lower.
There is a lot of work to be done to a "new" lower, regardless of the type, to make it work correctly and to be legal.
 

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Is there a way to use class 3 sear with a new 4 pos picto lower? Or, is the SEF trigger pack the only way to go?
It can definitely be done (I have one) - the "lot of work to be done" includes tig welding a strip onto the hammer so it can reach far enough out to hook onto the registered sear - the factory roller sears have an offset in them to clear the burst mechanism, registered sears are straight.

So if you can't bring the sear to the hammer, you just bring the hammer to the sear! Plan on $200-300 for the conversion.
 

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Entirely possible, and there are actually quite a few of them out there in burst packs, as well.

The conversion cost a bit more than quoted above (~$500) but the final fit and function is 100% spot-on. For the correct configuration of a gun you're trying to build, sometimes the Ambi-Picto-Burst group is worth the added expense. HTH,

 

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Entirely possible, and there are actually quite a few of them out there in burst packs, as well.

The conversion cost a bit more than quoted above (~$500) but the final fit and function is 100% spot-on. For the correct configuration of a gun you're trying to build, sometimes the Ambi-Picto-Burst group is worth the added expense. HTH,
The conversion price all depends on who does it. Urbach did mine for $150 back in March (and I "only" had to wait 3 weeks for the entire conversion), TSC Machine quoted me ~$300, and I think RDTS was about the same. For $500, they'd better take me to dinner and a movie first.

$500 just for the burst pack conversion is robbery. Besides the added hammer shelf, it's no different than any other trigger pack conversion - cut out the front lower corner, weld up one hole, drill a new one, and install the sear.
 

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Discussion Starter #6
Thanks guys, I found a rifle local that im going to buy. It is a HK 94 that was converted to an MP5. It has the SEF plastic lower which will be changed out to the 0,1,3,30.

Any recomendations on who to have do the work?

Will this modification risk the value or permanintly damage the sear?
 

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Thanks guys, I found a rifle local that im going to buy. It is a HK 94 that was converted to an MP5. It has the SEF plastic lower which will be changed out to the 0,1,3,30.

Any recomendations on who to have do the work?

Will this modification risk the value or permanintly damage the sear?
TSCMachine, RDTS, or Urbach all do them for sure. (Please don't send it to Urbach, it may slow him down on my G3K :) ). I'm not positive, but I wouldn't be surprised if Jayson at Investmentgradefirearms didn't do them as well.

I was about to add one more comment to my previous post - now that I have one, I never, ever, use it in burst mode. With some practice, you can learn to fire 2 round bursts, or 3 round bursts, all the while in full-auto mode. (And by repositioning your trigger finger, even single-fire shots as slowly or quickly as you wish). I'll probably still keep it, but will eventually replace it with an ambi 0-1-Full picto lower. Besides, it's more "correct" since mine is an MP5-N anyways.

And no, it will not devalue the sear in any way. It will not be modified (unless it's one of those odd-ball ones, like the ones where the trip lever and catch are a single piece).
 

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With some practice, you can learn to fire 2 round bursts, or 3 round bursts, all the while in full-auto mode. (And by repositioning your trigger finger, even single-fire shots as slowly or quickly as you wish).
+1. Much easier to install a "burst pack" in your finger by the sounds of things. ;) (That's where mine is, hehe!)
 
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