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Dannn

Gained an extra 30' flat trajectory for free!

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It's not often I'm stunned by how such s simple thing makes a huge difference!

Basically I'm fannying around with my bar 10 until my new internals come just seeing what happens from doing what.

I took the hop unit to bits to see how it works as it wouldn't lift .30's which I thought was a bit crap.

This is why... Pretty much no nub !

That pathetic excuse for a nub did nothing!

So I took the arm off, sanded the nub off, cut a square of pencil eraser 5mmx5mmx4

Stuck that on and sanded an angle on it so it made flat contact with the bucking, put it all back together and it'll now send .30's to the sky with full hop and a perfect flat trajectory with half hop on and I lazered the extra flat range at 30'

Now that's fucking awesome for 25 mins work and no cost in parts, just shows with a little experiment lots can be gained !

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I dabbled in this mod quite a bit after digging up an old airsoftsociety thread :P

 

I personally prefer using epoxy to shape the new nub as I find the pencil eraser is inefficient and can cause curving issues at long range I found it jammed up the whole gun when applying too much hop.

 

with epoxy or some similar filling you can file it to shape similar to a Dangerwerx arm,the parabola is way better(in my experience)

 

Of course,the inefficiency problems using a square eraser nub are only with standard buckings,a W-hold in my case,with R-hop or G-hop where pressure is applied differently the M-nub is better I've been told.

 

Maybe I have been doing something wrong using a flat eraser bit or maybe it's because of the way the W-hold works. Every bit of performance is worthwhile and if yours works then no bother at all.

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The firmness of the nub doesn't matter a whole deal as you can mitigate it through applying more or less hop anyway. Really it's the surface area that matters, which is why a lot of people are modifying the flat nubs to work with extended R-Hop patches for a maximum, even hop surface.

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Me thinks otherwise. The hardness of the nub matters a lot. Soft nubs allow way more range to adjust the hopup. In one of my bolt action rifles I have a hard nub and a maple leaf rubber and in colder weather it doesn't shoot at all. It goes from no hopup to jam. And that with a TDC mod.

 

I have also experimented with H nubs in my AEGs a few times and never experienced any increase in anything, only this decrease of hopup adjustability because the nub being hard.

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