I got a kitchen scale for christmas and my Attktc pump arm showed up a day later. Curiosity got the better of me. Stainless, aluminum, and titanium. All are full body length.
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At the end of the day does it really matter? -
This is excellent!
I recently picked up a Karnivor missing the pump arm. It didn’t seem likely that I’d find a stock aluminum one, so I actually ordered one of these titanium ones.
As far as does it REALLY matter - it’s for lobbing gobs of goo at random folks 4-5 times a year… so in the big scheme of things… absolutely not.
But I needed a pump arm for this Karnivor anyways and I can definitely feel the difference on my other autocockers when switching between the original Orracle bolt and the later all Delrin Worrblade bolt, which is about a 20 gram difference.
Check out my YouTube channel for overview videos of the WGP Karnivor and WGP Orracle!
https://www.youtube.com/@ScrambledEggs71Comment
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The myth about titanium in all industries is that it's lighter....
It most certainly is but only slightly compared to stainless steel. The benefit of titanium is where you would need say 1/8 stainless steel for strength you can sub out 1/16 titanium and have the same equivalent strength.
If your only swapping one to one.... It's only going to lighten up your pockets.Comment
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I bought both the pumparm and cocking rod for my merlin. I figured cutting the reciprocating weight can only help with speeding it up and the movement of the gun when shooting. Will it really make a difference who knows. Its on a gun I've shot once or twice in the last decade.Comment
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Indeed, titanium is the most overrated element on the periodic table. It takes deliberate skilled engineering to make it worth anything with the only (small) potential advantage over steal being weight and even that has to be done right and the gains being very small.
When F1 engines were hitting 18,000-20,000 RPM titanium was required…but even then only for connecting rods and the top piston ring. In a world where they could afford to make the entire engine titanium if they wanted to they absolutely didn’t because it would just add cost, lead time, and complexity as well as a worse engine.
In aerospace landing gear and armor require titanium, some turbine parts, that’s about it.
You will not pump faster with this. This could be easily measured with high speed video but when it comes to making something like a cocker, auto or not, shaving off a few grams isn’t going to be any kind of advantage. A lightweight pump assembly might be lighter to carry around but without some weight in a pump stroke it feels crappy and since it’s drive by a human arm that itself can save way more weight than this by simply not wearing a watch this is what we call “chasing noise”, like putting a carbon fiber battery cover on your F-250. The weight savings is less than the difference between any two hoppers.
Basically it costs more, may be weaker than steel depending on how it was made, and will probably have its threads effed up sooner. Since cocking rods are a part that often gets bent and they transfer all the force of cocking 1000s of times over and over if I were looking to upgrade it in any way it would be an effort to make it stronger, not lighter and weaker.Last edited by SignOfZeta; 12-31-2025, 08:08 AM.Comment
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Lots of interesting points, but unless Buff’s scale is wrong it’s still a 16 gram reduction versus steel.
If I notice a 20 gram weight reduction while shooting an eblade just swapping an Orracle bolt for a Worrblade bolt, then I don’t see how dropping another 16 grams off the pump arm is anything but a good thing (assuming it fits well, and doesn’t damage the back block threads).
Also swap to a lighter back block and a lighter pull pin and you could have maybe 50grams / 1.75 ounces less mass moving around with each shot, depending on the original setup.Check out my YouTube channel for overview videos of the WGP Karnivor and WGP Orracle!
https://www.youtube.com/@ScrambledEggs71Comment
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