ShockMax 40 (Nerf Stringer 40 max shell)
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Self-contained 40 max shell alternative power by Shock cord
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Updated at source:
Model information
- Source
- Printables
- Category
- Outdoor Toys
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
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Features
Able to shoot Nerf Mega darts at 75 fps. This is the best I can get when testing; depending on how the preload of the cord was at rest state, the spectrum of FPS is between 65-75 FPS.
Shell is designed to load:
Single mega dart
3 long darts
3 Rival balls
6 short darts
BOM
M3 heat-set inserts (M3x8x5) qty 4
M3x20 mm SHCS qty 4
#4 1/2" self-tapping screw qty 12
M3x20~25 mm self-tapping screw qty 1
4 mm shock cord ~ 2m
3 mm shock cord ~ 0.5m
Lube
Printing
Instruction
1. Install qty 4 M3 heat-set inserts
2. Attach the replaceable rim plate to the shell butt; secure with qty 6 #4 1/2" screws
3. Lay the catches and primer bits inside. Mind the orientation
4. Thread a piece of 3mm shock cord through the primer to secure it to the base. Tie knots on both ends and trim off excess
5. Secure to body with qty 4 M3x20 bolts
6. Assemble the carriage and the hook piece. Secure with qty 1 M3x20 or 25 mm self-tap
7. Weave in the 4mm shock cords. Cut three sections of ~300 mm long cord, and pass them through the carriage like the pattern below. The openings are small; to pass one head of a cord through an occupied opening, pull on the existing cord to compress the circumference
8. Make sure an equal length of cords is left on one side of the carriage. Tie a knot at each end (qty 6) at about 90mm mark
9. Make sure the carriage+ hook orientation matches the opening in the main body
10. Drop the carriage in the body. Install the rollers and the shell tip pieces and secure with qty 6 #4 1/2" screws
11. Wrap a piece of 3mm cord around the groove in the picture below 2 TIMES
12. Make a double loop on the single knot; pull tight until the cord shrinks to fit inside the groove. PERFORM OVER AREAS where the CATCH PIECE IS NOT PRESENT
11. Pull the carriage forward; the 6 pieces of cords will go 180 on the rollers
12. Grab two adjacent pieces of cord, pull back to the button, drop in both knots, and seat them in the opening at the end. These should feel a bit tensioned but not too tight. Repeat three times
13. Adjust power by manipulating the locations of the knots and the length of the cord. Once satisfied, trim down excess cord