The-Gryphon-Foam-Dart-Blaster

The Gryphon is a mostly 3D printable, hobby-grade, Nerf semi-automatic flywheel blaster. Its main design features are as follows:

• Uses 130 to 180 sized 20.4mm , brushed DC motors.
• Semi-auto by rack and pinion with 1:3 gear multiplication. The trigger pull is fairly short at 12mm.
• Accepts 33 to 38mm OD flywheels (all 2mm shaft fit, superstock upgrade flywheels).
• Utilizes a horizontal flywheel cage that bolts directly onto the magwell. This is a mounting pattern less prone to misalignment than a Stryfe's mounting bosses or similar.
• Accepts Worker Talon mags, Katana-geometry mags with a lower release cut-out, and almost all full-length magazines.
• Battery is located in the stock or a side battery tray.
• Full-length feed guide integrated in magwell for maximum feeding reliability.
• Bore-axis is almost as close as possible to top rail of blaster, which is theoretically more intuitive to aim with.
• Will fit on build volume as small as 120 mm³.

Some options/variable features are:

• Variable motor center distances from 43.5mm to 38.5mm (Eclipse).
• Full-length, flat-top picatinny rail.
• Ambidextrous, or one-sided sling mounts, or a WORKER attachable sling mount.
• A mag release meant to be actuated by the operator's off-hand, and one meant for the dominant hand's middle finger.
• Flash hider: Helps work around cover, and can be used to house and launch a mega dart.
• Kill-switch mount on stock, and a kill-switch + voltmeter mount on stock, and variations for imperial PVC using 3/4'' PVC instead of 25mm PVC.
• An additional EXPD stock option that holds larger batteries, has the same options.
• 14mm or 14.5mm bore flywheel cages or MAX cages, which are 15mm bore, Daybreak / Twilight only, have extra motor can support, and are intended for maximum FPS.
• An optional foregrip and magwell option for mounting this foregrip.
• An optional bottom-picatinny variant of the motor cover.
• 2-stage flywheel cages in all the aforementioned 'crushes' and bore options.
• Talon, 'Kathanha/Katobu', and full-length magwell options.

Required for assembly:

• Two 130-180 sized motors.
• 33 to 38mm, 2mm shaft fit flywheels
• 16-18 AWG multi-strand hobby wire
• Connectors of choice (XT60, Deans, bullet connectors), and heat shrink.
• One full-sized microswitch, 15A or 21A.
• M3 nuts
• M3 screws: 5mm length, 8mm length, 10mm length, one 14-16mm length for mag release pivot, one 20mm length for one specific screw on the motor cover.
• M2 screws: 4-5mm length for motor mounting.
• 2x20mm steel dowel pin for the pinion gear.
• 0.5mm coil thickness, 5mm diameter compression springs. 15mm in length for the mag release, 50mm in length for the trigger return spring.
• An adhesive for stock assembly, preferably methyl methacrylate based.
• Modular connectors to flywheel cage and to stock assembly (if using kill switch and/or voltmeter) highly recommended.
• For a battery stock: 10-20cm length of 25mm OD PVC pipe (length depends on however long you want your stock), or 3/4' Sch 40 PVC.

Licensed under the CC0 1.0 Universal Public Domain Dedication (Creative Commons) license.

Do whatever you please with this blaster, modify, distribute, sell. Preferably don't claim ownership of the original design, that'd be all I want.

The main CAD files are bigger than 25 MB and have stopped playing nice with GitHub, so the most up to date source files at any time are available here: https://a360.co/2N3szi3