What I did was take the barrel from an old broken springer airsoft shotgun and cut a groove in it with a dremel and metal cutting wheel. If you have seen an AEG barrel, you will know what I'm talking about.
This is what it looks like from the side now
After I cut it I slid a hop-up bucking (the rubber part that touches the BB and puts spin on it) over that end of the barrel on the groove. If you don't have any small rubber sleeves like that laying around, just make a smaller groove and use an o-ring. I then wrapped some e-tape around the barrel until it was a snug fit into the 1/2" cpvc to center the airsoft barrel in the bigger cpvc.
The next step is making it adjustable. I found a small unpointed machine screw and drilled and tapped a hole in the cpvc over the hop-up bucking. I then glued in the barrel and put the screw in. It works like this: When you tighten the screw, it goes down, pushing against the rubber, which pushes up against the BB more, thus causing more or less backspin. I did put a small bit of foam between the tip of the screw and the hop-up rubber to keep the screw from tearing up the rubber.
Some pics.
Down the barrel
The hop-up and barrel next to the gun base.
The NF-1 carbine. (still lacking a paintjob atm)
It performs fairly well, shooting well over 100 feet un-angled. It probably reaches about 150 ft. The hop-up is really easy to adjust by hand, no screwdriver required.
I'll take any questions or comments. Thanks for viewing!
, you reckon you can post the pictures on photobucket? Only one of the pictures were loading...
Any other opinions?
hope my dad doesn't find the hole). The only other gun I have that can do that is my 340 fps JG AK-47 B. Spetsnaz.
I'm like an australian!
