First here's the gun stock, well mines not completely stock.
![Posted Image](http://i269.photobucket.com/albums/jj51/ChiliPepperFender/sm750.jpg)
Anyway, you open up the gun by prying off the orange cap by the barrel as well as the one by the pump.
![Posted Image](http://i269.photobucket.com/albums/jj51/ChiliPepperFender/sm7502.jpg)
Now take out the pump, and plug it using hot glue.
![Posted Image](http://i269.photobucket.com/albums/jj51/ChiliPepperFender/sm7504.jpg)
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.
![Posted Image](http://i269.photobucket.com/albums/jj51/ChiliPepperFender/sm7503.jpg)
Put everything back together inside the gun.
![Posted Image](http://i269.photobucket.com/albums/jj51/ChiliPepperFender/sm7505.jpg)
Screw on the screws and your done.
![Posted Image](http://i269.photobucket.com/albums/jj51/ChiliPepperFender/sm7506.jpg)
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.