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--there is no room anywhere else.
- 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.
- 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.
- 14mm or 14.5mm bore flywheel cages.
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.
- 10-20cm length of 25mm OD PVC pipe (length depends on however long you want your stock), or 3/4' Sch 40 PVC.
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.