6 replies to this topic

[ChiliPepperFender]

This writeup is essentially the one in the "modifications" part of the website but this one is the older version gun and could have different results. On the to write-up.

First here's the gun stock, well mines not completely stock.


Anyway, you open up the gun by prying off the orange cap by the barrel as well as the one by the pump.


Now take out the pump, and plug it using hot glue.


Replace the barrel with about 5 inches of PETG or another barrel of your choice, and add vast amounts of etape untill it is a snug fit inside of the airtank.


Put everything back together inside the gun.


Screw on the screws and your done.



Range test results:
Ok, I've seen a couple other sm750 mods and they're getting in the 90's with 2-3 pumps, that's not the case for mine.

I've found that you need 7 pumps, which is when it starts to get hard to pump, to acheive ranges of 90'.

Stefan with 7 pumps:
97'
90'
87'
92'

Stefan with 3 pumps:
50'
53'
47'
48'

This was used a a 1.5 inch stefan that has a 3/0 fishing weight inside of it. The accuracy and velocity is fantastic with this gun. Comparable to my crossbow's.

For fun, I did a range test with a streamline with 7 pumps and here's what I got:
117'
109'
68'
116'

I was really surprised to see the darts soar that far, they were extremely unaccurate, but they twirled around and stayed up for a remarkable distance. Obviously, the 68' one, twirled straight into the ground. Also, all of these range test were done on a flat surface with a 0 degree angle on the gun.

Any questions, comments, flames?

Edited by ChiliPepperFender, 30 May 2008 - 10:53 PM.

[Scotch]

It should be noted that the barrel should not go all the way to bottom of the airtank.

Otherwise, Nice Wright up.

[keef]

http://nerfhaven.com/mods/cxwq_sm750/

Same gun, same mod.

Also, if anyone says you get more than 90 with a SM750, your lying, its not even possible I think, a 2k one is bigger and gets better ranges. I usually get 70 feet if I'm lucky.

[TED]

Ummmmm... why should this mod have different results when the internals are identical?

[ChiliPepperFender]

It should be noted that the barrel should not go all the way to bottom of the airtank.

Otherwise, Nice Wright up.

Well the end of the air tank has a small white barrel around it and that's what I meant, sorry for any confusion.

http://nerfhaven.com/mods/cxwq_sm750/

Same gun, same mod.

Also, if anyone says you get more than 90 with a SM750, your lying, its not even possible I think, a 2k one is bigger and gets better ranges. I usually get 70 feet if I'm lucky.

I know it's the same gun, and mod, but's it's a different version of the gun, I also stated that in the first sentence of the write up.

90ft? It's possible. If it's not then I'm lying, and so is this guy. http://nerfhaven.com...wtopic=5448&hl= He says that with 3-4 pumps he gets this. If 90 ft isn't possible, than cxwq is also lying. You probably have something wrong with your 750 that you don't know about, because with 7 pumps those are dead on measurements for me. I don't think you can achieve 90 ft with 3 pumps though. I was only hitting 50'.

[ompa]

It could just be the case that for some reason or another, his pump ended up being more efficient than yours when it was produced. I know that my titan requires an abnormally high number of pumps, somewhere around 20-25, to prime. Even before the release valve was plugged, it required somewhere around 16-18. From what I've gathered, most people don't require that many pumps. It's just more proof that some people just get lucky with how well their pumps work.

~ompa

[Retiate]

Nice write up.
That's the older version right? I have the other version and I also give it 7 pumps and it gets 90'. I've seen it hit around 100'.
If I remember right, the other version (the one I have) has that white thing that the barrel used to go in as well. I remember wrapping e-tape around my barrel just like you did, and I'm pretty sure that was on my 750. Could be wrong though.