After a Year of "No...
 

After a Year of "Not Invented Here," Where Is That "Improved" Diana Stormrider Trigger?  

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Steve in NC
(@steve-in-nc)
Dealer
Joined: 2 years ago
Posts: 323
2019-05-27 11:46:50  

More than a year ago on these pages, I suggested an existing, proven, and cost-effective solution to the Stormrider trigger problem.

https://airgunwarriors.com/airgun-talk/a-first-look-into-the-possibilities-of-the-diana-stormrider/#post-2478

It was rejected because Diana was supposedly developing their own two stage trigger.  So -- where do things stand now?

Apparently still not so much improved, after all.

Trigger pull and adjustment

The Gen II trigger is adjustable. Unfortunately Diana didn’t put the directions for adjusting it in the manual. I discovered that both the front and rear screws affect where stage one stops and stage two begins, and no amount of adjustment gets rid of all the creep in stage two. It came from the factory with a long stage one that was a pound and a short creepy stage two that breaks at 4 lbs. 15 oz. After a lot of fiddling I got the long stage one at a pound and a fairly crisp stage two at 5 lbs. 5 oz. I like a positive release over a light trigger so I’m leaving it where it is.

I don’t have any specific instructions for you. It seems like the front trigger is for the stage one length of pull and the rear screw is for the let-off weight. But both screws seem to affect both adjustments, so who really knows?

Diana Stormrider Generation II precharged pneumatic air rifle: Part 2

I ... decided to ... adjust the trigger.  This is where the frustration returned, first off there were (and as far as I know still aren’t) no instructions to be found anywhere on how to do this.  This is one of the primary advertised changes to the new gun and there are no instructions on how to adjust it. 

https://www.ctcustomairguns.com/hectors-airgun-blog/ken-wheelers-adventure-with-the-diana-stormrider

Fortunately that prior solution is still available from a well known retailer -- and still comes with full instructions for installation and adjustment.

Diana Stormrider / Air max varmint super sear


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marflow
(@marflow)
Joined: 2 years ago
Posts: 606
2019-05-27 14:51:50  

they already make a 2 stage trigger and it is in the Chaser

I wonder if the Chaser trigger and sear would fix the Stormrider, it would move the sear spring back o the middle of the sear and the trigger already has 2 adjustment screws one in the front and back of the trigger, although the back screw is too short

the sear spring could be problem because it would not have the dimple on the tube in the right place but that could be overcome

and of course if the Stormrider components are like the Chaser's they need to be reworked, the trigger pin just fall out when working on the trigger assembly, just plain sloppy and shim help

so there is another rub, getting the Chaser parts to test the compatibility,  the last I checked PA had none maybe I will try again

Steve just ideas that might work, but I don't own a Stormrider or ever will but I have made many changes to the Chaser trigger group and I think drilling the sear to make a trigger stop was the best, I now have 1.5mm of trigger travel just the way I like it, short and sweet

Mike


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Steve in NC
(@steve-in-nc)
Dealer
Joined: 2 years ago
Posts: 323
2019-05-27 15:40:46  
Posted by: marflow

they already make a 2 stage trigger and it is in the Chaser

I wonder if the Chaser trigger and sear would fix the Stormrider...

Even if the Chaser parts would fit the Stormrider (which, looking at them, seems very unlikely), doesn't the Chaser trigger suffer from at least one of the same defects Stormrider owners are complaining about:  Zero info in the owner's manual about how adjustments are supposed to be done?

Which compounds the irony of how little regard Diana corporate management seem to have for a complete, proven, existing, drop-in, documented trigger solution.


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marflow
(@marflow)
Joined: 2 years ago
Posts: 606
2019-05-27 18:59:50  

well the Chaser has a trigger screw in the trigger and one hiding and that one can found by taking the trigger guard off

the grub screw there is too short with a  3mm x 3mm, I changed to 6mm with a 2mm bearing ball epoxied on

the front screw does nothing except push down on the sear, the more you screw it in the less the sear face intersects the hammer face

so if you take the trigger out all together and press on the sear you will notice that the sear face will push the hammer back, in camming motion

so with the trigger in place the front screw screwed in you can get to the point where the sear will not catch so you back that off and set the rear screw to trip the sear    also the front screw has a 2mm bearing ball

you can adjust all of it with the frame in hand and watch the interaction

so there was trigger travel after tripping the sear so I heated the front of the sear and added a 3mm x 6 or 8mm grub screw

so with the sear adjusted too a safe point and the rear screw adjusted too trip the sear with little movement and the trigger stopping at that point with the trigger stop

and making new pins with 2.6mm drill bit ends and use RC  aluminum shim and putting in .3mm sear spring instead of the .67mm one

and then hand fit everything because the 3 I have done are all I little different you get a trigger as close to a FWB model 90 as I could get

so was it hard no, not with the right parts and tools, could anyone do it or part of it, sure, was it worth it, to me yes, I was the customer

Mike


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Steve in NC
(@steve-in-nc)
Dealer
Joined: 2 years ago
Posts: 323
2019-05-28 17:17:33  
Posted by: marflow

...so was it hard no, not with the right parts and tools, could anyone do it or part of it, sure, was it worth it, to me yes, I was the customer

Well, one thing's for sure.   If the Stormrider manual trigger-adjustment info' had even a fraction of the detail your writeup here does, there'd certainly be no room for complaints about that!


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