Home Made Nerf Pump Snap

These are pieces to make a pump snap Nerf gun ( here's a link to a great write up http://nerfhaven.com/forums/topic/24725-pump-action-snap-30-write-up/). These blasters are normally pretty easy to make. One of the most challenging parts of making one of these is creating a good air seal and trigger ramp. This assembly is made to fit inside of any pipe with a 1" inner diameter. By the way this is my first design and I'm looking for any feedback.
Thank you!


To make this you will need
1x 10/24 by 1 1/2" screw
1x 10/24 tap
1x 1" outer diameter 1/8' O ring
2x "Part 1"
1x trigger ramp
1x rear spring stop