Tuning FX Impact Mk2/M3 - slower first shot - no reg creep - quasi-scientific analysis

[Superpete]

I think FX left white o-rins dep there and not contacting the black bushing so the black bushing not pressing on the white oring and not compressing it under its force, who knows what they were thinking, but I like the concept. In order to drill it correct depth we would really need some precise maching to kae that hole just so.

 

[GMANCO]

Instead of drilling that conical section out to create a flat seat area and "risking" violating min thickness, could you press fit a soft metal plug into that conical section and then drill a clean hole for the rod to pass through?

 

[Airgunnerscott]

Instead of drilling that conical section out to create a flat seat area and "risking" violating min thickness, could you press fit a soft metal plug into that conical section and then drill a clean hole for the rod to pass through?

mubhaur on this forum has the answer for this problem....I been using it for a couple months now and have no slow first shot at all anymore.... Even after a couple days off sitting.....
Someone just needs to take his design and have it mass produced and stop trying to fix an old defective part I think..

 

[Superpete]

Instead of drilling that conical section out to create a flat seat area and "risking" violating min thickness, could you press fit a soft metal plug into that conical section and then drill a clean hole for the rod to pass through?

That a good idea, a aluminum insert, thats it.

 

[GMANCO]

That a good idea, an aluminum insert, thats it.

Or that peek material you used could work also.

 

[GMANCO]

mubhaur on this forum has the answer for this problem....I been using it for a couple months now and have no slow first shot at all anymore.... Even after a couple days off sitting.....
Someone just needs to take his design and have it mass produced and stop trying to fix an old defective part

I’d be a buyer for sure!

 

[mubhaur]

mubhaur on this forum has the answer for this problem....I been using it for a couple months now and have no slow first shot at all anymore.... Even after a couple days off sitting.....
Someone just needs to take his design and have it mass produced and stop trying to fix an old defective part I think..

View attachment 589678

By the grace of God I didn't receive any negative feedback on this part yet.

I just wanted to help out airgunning community. The problem is this that there is very thin profit margin on this part. Such things cannot run the kitchen. I am a professional accountant and airgun modification is just my hobby. My machinist makes these parts on manual laith machine and it takes him more than two days to make one part.

I have shared the details of this part with Huma-Air for mass production without charging them money.

Huma clearly refused as perhaps this is also not a good profit making item for them.

Mubhaur

 

[Apollo]

I think FX left white o-rins dep there and not contacting the black bushing so the black bushing not pressing on the white oring and not compressing it under its force, who knows what they were thinking, but I like the concept. In order to drill it correct depth we would really need some precise maching to kae that hole just so.

Pressing the bushing against the o-ring is indeed never the intention, but I assume that if you press it, you want it to be at a fixed distance just behind the o-ring without the 2 mm clearance it currently has.
Unless the bushing really has no other purpose than to more or less hold the o-ring in place when it is not under pressure.

 

[Apollo]

Instead of drilling that conical section out to create a flat seat area and "risking" violating min thickness, could you press fit a soft metal plug into that conical section and then drill a clean hole for the rod to pass through?

I fear this would increase the risk of leaks.

There is room to drill the seat flat.
The question is, how far, and is the part that is modified by FX and currently installed on the M4 and sold as a spare within tolerance?
If so, it would be helpful if FX could confirm this.
This is a simple question asked out of genuine concern, not emotion or a desire to cause fuss.
Hopefully, this concern is unfounded, as I have an M4 on my shortlist and therefore, confirmation would be greatly appreciated.