Length: 36 inches
Plunger load: 18-32lb
Spring load maximum: 38lb
Optimal Barrel Length: 12 inches
Plunger rod has three notches affording different load rates which gives the user different range options.
28lb Pull: 140 feet
22lb Pull: 110 feet
16lb Pull: 80 feet
Individual results will be dependent upon too many factors to list so take these only at face value.
Tools REQUIRED for following this guide
+ PowerDrill or Drillpress
+ Mitre Box & Mitre Saw or a power tool useful for cutting plastic rod or tube (such as a table saw, circular saw, or band saw)
+ #6-32 Tapping Bit
+ Hobby Knife (to clean the edges of the sheets once cut)
No other tools expressly needed. All tools listed are not easily substitutable and I don't recommend attempting to make this gun with anything other than a scrollsaw due to the size of the parts you will be making.
Note: You will also need some full sheet label paper, electrical tape, and some spray silicone lubricant.
All items available through Mcmaster Carr
Simply search for the part #s listed. Total cost of supplies listed is around $80 plus shipping. You will have enough excess of most materials to make atleast 2 or 3 more guns.
Be warned. This guide has 37 steps. Not because the project is extremely complicated, but because I'm going to go into a good deal of detail on each step.
Step 1: Step One
Print them on full sheet label paper. If you ran out of color ink (like I did) make sure to use a colored pencil to mark the holes with the size you will need to drill them to.
Step 2: Step Two
Set aside the labels indicated in the picture because you won't be applying them right away.
They will have to be applied to the opposite ends of the 13.25 x .5" length piece of 1/4" thickness polycarbonate that will become the plunger rod. You can cut this out now or later using a scroll saw or table saw after marking the dimensions.