Dual-Mag Blaster Fileset

This is the Dual-Mag, a feature-rich blaster built from a mostly forgotten gem; the Nerf Dualstrike. Back in the day these pistols could be modified to hit over 300fps, so I thought “what if it could be magazine fed”. Years of planning later and almost a year of design work and testing it’s finished. And yes it can still hit over 300fps.

 

Features and specifications:

• Access to the internals with 4 thumbscrews -> 30 second spring swaps
• Capable of under 100fps up to over 300fps -> use one blaster for any fps cap
• One of the smoothest primes on any blaster without needing a linear rail
• 84CCs of plunger tube volume, which can be reduced down to 27CCs with different prime length plunger rods
• Upwards offset pusher makes the blaster more compact and allows easier aiming
• Built to last -> tested for months on end without part breakages
• Can use skinny springs such as K25 as well as larger diameter Lynx springs
• 3 different stock options -> proprietary printed stock, N-Strike stock mount, or picatinny stock mount
• Hardware-less barrel collet that actually holds onto your barrels
• Aluminium and brass barrel support without being locked into one ecosystem
• Option of using the stock plunger tube or a replacement one for higher fps and better shot consistency
• Very accessible hardware -> bearings and aluminium bars can be left out for a low budget build
• Gravity drop magwell and skinny pusher combo for lightning fast reloads
• Absolutely no print rubbing noises when priming the blaster
• Hidden storage on the blaster for 2 spare pusher o-rings
• 4 styles of trigger for additional customisation
• Blaster can be easily split up for transport within minutes
• Printed thumbscrews that can be used for other blasters
• Two very robust sling points you can rely on for holding the blaster
• Extremely in-depth instructions including a part picking guide and a colour guide
• All parts are pre-oriented for printing and use little support material

 

Includes 83 different STL files for ultimate customisation. That’s setups for the stock Dualstrike plunger tube or a replacement one, cutting guides for the aluminium bars and plunger tube, 3 different stock options, 7 different plunger rod options, 4 different trigger options, and support for both aluminium and brass barrels. There’s nearly limitless ways you can set up your Dual-Mag.

 

Build instructions: https://docs.google.com/document/d/1FwFYfcba1A_85FVeNrz2GNO8iTmwqg6iVIfeh7LKA30/edit

View other people’s Dual-Mag setups and add your own here: https://docs.google.com/spreadsheets/d/1VMRCH-oRMstqYYbp3dcvYBsHjTY0-2jcuyJyqVIzaUs/edit

 

Hardware list:

• 1x Dualstrike
• 10mm x 3mm aluminium flatbar (3x 215mm and 2x 260mm lengths) – can be substituted for printed bars
• If using stock plunger tube: 3x 1-5/16 OD, 1-1/16 ID, 1/8 inch cross section o-rings – equates to about 33.3mm OD and 27mm ID
• If using replacement plunger tube: 3x 34mm OD, 28mm ID, 3mm cross section o-rings
• 4x M3 countersunk screws anywhere from 12-15mm
• 4x M3 8mm screws
• 7x M3 12mm screws (only needed if you’re using bearings)
• 14x M3 16mm screws
• 2x M3 20mm screws
• 20x M3 hex nuts
• A small magazine release spring (4mm OD or less, and ~12mm long)
• Supply your own picatinny foregrip of choice
• Silicone grease
• Teflon tape (possibly not needed) 
• OPTIONAL: 36mm OD, 34mm ID, 120mm long replacement plunger tube
• OPTIONAL: 7x 623zz or 623 bearings (10mm OD, 4mm thick, 3mm hole) – can be left out for a much less smooth prime and trigger pull

Stock configuration:

• No stock: No extra hardware required
• N-Strike stock: 3x M3 16mm screws, 3x M3 hex nuts, 2x M3 12mm screws
• Picatinny stock: 3x M3 16mm screws, 3x M3 hex nuts, 2x M3 12mm screws
• Proprietary stock: 7x M3 16mm screws, 5x M3 hex nuts, 2x M3 12mm screws
• OPTIONAL: For quickly removing the three stock types the 2x M3 12mm screws can be switched for 2x M3 16mm screws and 2x M3 hex nuts with a printed thumbscrew handle

Aluminium barrel setup:

• 16mm OD, 13mm ID barrel anywhere from 10-45cm (depending on spring and draw length) – can use down to 12.8mm ID without a chamber (requires alternate pusher o-ring)
• 1x 10mm OD, 6mm ID, 2mm cross section o-ring (assuming a 13mm ID barrel or 13mm ID chamber)

Brass barrel setup:

• 17/32 barrel anywhere from 10-40cm (depending on spring and draw length)
• 1x 10mm OD, 6mm ID, 2mm cross section o-ring

Spring options:

• Can use any spring that’s Talon Claw sized (K25, K31, 788, 9kg Worker Longshot spring)
• Can use larger diameter springs under 34mm OD (Lynx springs, older nerf Longshot springs, 14kg and 18kg Worker Longshot springs)