T97 trigger pull UPDATE on page 2

My T97 without any modification burst fired on me last time I had it out. I pulled the trigger once, two rounds came out. I am 99% sure that what happened is that the recoil somehow caused me to pull the trigger a second time, but I don't know for sure.

Curious to know whether this happens with the shorter rods.

I think when you get this perfected you can sell these shorter rods on the EE to those of us without metal working tools and make a nice little profit for your excellent work :)
 
Hey everyone. I'm the fabricator helping Noflo2000 with this project. If you have any technical or specific questions let me know here or via PM. I'd love to help you out or get suggestions. I'll try hit a few things here first though.

Material: 6061-t6 aluminum (chosen for a variety of reasons)

Dimensions: I will not provide dimensions. This is Noflo2000's project and he may yet proceed with the sale of these. It took us several prototypes and many machining files to get this piece. Machining and design costs are not cheap.

Machined using a CNC 3 axis mill.

Trigger pull has been reduced to approximately 1/3rd of the regular distance of Noflo2000's T97 but has lead to more difficult assembly and disassembly. Other longer versions (reduction to 50-90% trigger pull) showed no impact on assembly/disassembly. I'm not sure how universal this would be for these rifles. Different rifles may have different stock trigger pull lengths. We were seeing ~15mm pull originally and ~5mm before we hit difficulties with assembly.

Here's some pictures!

WP_20140524_00_26_45_Raw.jpg


WP_20140524_00_29_13_Raw.jpg
 
I was - literally - going to put my T97 up on the Equipment Exchange this weekend - and this thread has changed my mind. The trigger was so disappointing, I was actually going to switch over to a Keltec SU-16 instead. Prefer the length and receiver of the T97, but that trigger was a deal-killer.

WAS a deal-killer. You've given me hope here...

Any plans to bring this to market? I'd love to throw some money your way Noflo2000. ;)
 
That looks like a brilliant, but risky solution. The strength of the metal between those two holes could get stressed... It's a thin bit of metal between the two. If it bends (or worse, tears through), you could render your trigger completely inoperable. And good luck getting a new bar I imagine.

Probably want a bit more space between those two holes, but then the question is whether it would still be a safe trigger, or capable of re-assembly.
 
Basic drill. I can assure you that your hole in front of a hole solution will not work. Please do not attempt to modify you trigger bar this way.
 
basic_drill said:
Is there room inside the receiver to simply drill a new hole on the end of that bar 9mm shorter? Then we can simply switch it back? Or does the end of the bar need to be removed as well?

Like this: (holes should be further apart for 9mm.. this looks like 6mm the way I've drawn it.. or it could be 12mm via leverage if that makes sense)
282pbi1.png


Edit: I pulled mine apart and it looks like there's plenty of room for the extra hole. Any reasons why we shouldn't?
Click to expand...

@basic_drill: Don't try it. The difference between the original rods and the rods we made is incredibly small. The was the trigger mechanism is designed means that a tiny change in the hole placement makes a huge change in trigger pull. For example. In our original tests, we tried a range of lengths. A change as low as 0.125" made the mechanism impossible to assemble. We're talking pretty tiny changes, hence the use of a CNC mill.

I have a few made up ready for testing. I'll put them up for sale and you guys can be the judge of them. Will edit this post once they're available.
 
Up for sale for testing? Given people are using their own guns for testing, you'd think maybe one in return for beta testing feedback, reviews and range trials would be more appropriate.

Having potential clients buy and test at their own risk is an interesting approach.

If you've worked out all the bugs then "for sale for testing" shouldn't be needed.
 
fenceline said:
Up for sale for testing? Given people are using their own guns for testing, you'd think maybe one in return for beta testing feedback, reviews and range trials would be more appropriate.

Having potential clients buy and test at their own risk is an interesting approach.

If you've worked out all the bugs then "for sale for testing" shouldn't be needed.
Click to expand...

You misunderstand. I'll do my best to clarify. My mistake.

They work on the one rifle they have been tested on.
There are no foreseeable bugs.

Feedback concerning how much the trigger pull has been or should be altered is appreciated and whether every one of these guns is the same. I only had one rifle to test it on.

Also, for sale for testing (prototyping to completion) is completely accepted in many of the machining circles I run in. The reason is that materials and CNC machine time is so insanely expensive that you will be hard pressed to convince any machinist to even turn on their machine for anything less than $100 regardless of whether it has bugs or not. I simply can't afford not to get some kind of return.

Again, my mistake. Hope that helps.
 
I will test the new batch in my t97 this week. That said I am away at work now returning soon if there is anyone in the Saskatoon area who would like to try my t97 with an upgraded trigger bar next weekend shoot me a pm and we can try to meet up sometime. And then post a reply on this thread as to your impressions on our upgrade.
 
I'd be willing to test-buy for you, and provide detailed feedback. What's your anticipated cost?

Also, if you have previous variants / other machined versions, I'd be willing (assuming no additional cost) to provide detailed feedback on different versions / prototypes in terms of length of travel of the trigger in mm measurements, any change in trigger-pull weight, assembly issues, etc. Range report would be doable within 2 weeks of receipt.
 
Astute Observer said:
I'd be willing to test-buy for you, and provide detailed feedback. What's your anticipated cost?

Also, if you have previous variants / other machined versions, I'd be willing (assuming no additional cost) to provide detailed feedback on different versions / prototypes in terms of length of travel of the trigger in mm measurements, any change in trigger-pull weight, assembly issues, etc. Range report would be doable within 2 weeks of receipt.
Click to expand...

Sounds like a great suggestion!

I'm assuming that everyone is going to have different opinions on how much trigger pull is perfect. If you're willing to help hash out a few sizes that are appealing then I'd be more than happy to send out a few already made prototypes. They're worthless at this point anyways. I'd have to have a look at what I still have here though.

No promises obviously :p

Also, looks like they would be >$25 a piece + $5 shipping anywhere in Canada. I can ship multiples in one package no problem.



Edit: forgot to add anticipated cost
 
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