RapidMag Heavy - Nerf MEGA 20x95mm Magazine 10 and 17 round capacity

thingiverse

#RapidMag Heavy A printable 20mm MEGA magazine for hobby grade nerf blasters, especially designed for full auto or high ROF use. Intended to fit standard ~250mm (X) i3 beds. Features: Rail-guided tall follower for tilt resistance. Side reliefs and front sharp guide rail to prevent rubber tip scrubbing and wedging. Toolpath control texture on inside surfaces that contact darts, as necessary to present only extrusions parallel to feed direction. Printing: Don't field PLA! Recommended (for 0.45-ish mm extrusion width): 3 perimeters, 20% hex infill, 6 tops/bottoms. Orientations: All body pieces outside surface on the bed. Follower standing on the bottom surface. HARDWARE: 6-32 x 0.5" SHCS for body assembly x 11 (10 round monolithic) or x 15 (extended 17 round) One 6-32 x 1.5" SHCS for the spring pulley shaft in the follower. One constant force nerf drum mag spring, available from various hobby suppliers. ** It may be possible to substitute M3 SHCS for 6-32 - do not drill or tap, force into printed hole. SUPPLIES, TOOLS: Superglue or Devcon, only needed to build extended spliced version. White lithium or other non-silicone grease to lube follower rails. Drill and tap for 6-32 and clearance drill for 6-32 if using 6-32 hardware. File or sanding stick. Build Procedure: Clean up parts meticulously (strings, burrs, etc.) Clean out all clearance holes with drill Clean out all holes to be tapped with tap drill Tap all holes. (Hint: Use oil when threading PETG) For extended version, splice body halves with connector bands, and adhesive of choice. (Best to bolt them together while gluing for alignment help) Use file to clean up follower rails. Remove all layer lines completely Grease follower rails and/or body slots, run follower up and down in each body half to distribute grease. Less grease is more Clean up any grease that got on dart contact surfaces with alcohol. Wind CFS onto spring pulley. Use 1.5" SHCS to mount pulley inside follower. Don't overtorque. Flatten CFS hook end a little and clip it into the slot. Insert the end into the blind pocket to secure (Use a small blade to lift up the edge of the pocket opening if necessary) Set follower into place. Bolt body halves together. Tested both versions to be reliable at 12rps full auto with a 20x95mm T19.and whirlwind darts. Hasbro compatibility is unproven as I don't have any Hasbro blasters to test.