Cynthia is a Talon mag fed bolt action blaster, customizable for any need.
Changelog (click this text, it's a dropdown!)
- Changelog: 3-31-2023: Blaster release.
I ALSO UPLOAD TO PRINTABLES https://www.printables.com/model/822838-cynthia-bolt-action-blaster-nerf-homemade
Cynthia is a bolt action blaster using the same basic layout as the Indra by CaptainSlug. Cynthia began with me figuring out how to fix all the issues with the Indra, but I pretty quickly realized it would be easier to design a whole new blaster from the ground up, rather than fix the Indra part by part. Cynthia contains no original Indra parts.
Firing Demo: https://youtube.com/clip/UgkxEHjsmXU370IFB8PHDxiK1v4qDb7vdCwZ
Blaster Overview: https://youtu.be/mIW0dAyOCv0
Customization Overview: https://www.youtube.com/watch?v=mZe6dWdQUs0
Assembly Video: https://youtu.be/j310YjRcwpU
Videos:
- Coop772: https://youtu.be/EAlBAFHLBZ4?si=m3mHurtMuX4kwWqg
- Captain Xavier: https://youtu.be/w24jp0K5Wfk?si=fWUyEQeJ973HoaAR
- Boomstick Mods: https://youtu.be/WF5V2YcIIjc?si=WsV3GZjRpdS0lTr-
- ZDL (China Spec): https://youtu.be/mkXsqYBOBpE?si=tJq3lU1MIqGpPgKb
- WalcomS7: https://www.youtube.com/watch?v=UhGpRX_KlXE
- BansheeIndian: https://www.youtube.com/watch?v=CzInCRDko88
If you enjoy the stuff I make, please consider donating via Patreon or BuyMeACoffee. Filament and prototyping stuff costs a lot! By donating, I can make more cool stuff for everyone to enjoy. Thanks!
https://www.patreon.com/sillybutts Monthly donations
https://www.buymeacoffee.com/sillybutts One-time donations
The Indra by CaptainSlug is infamous for it's many issues. Thankfully, Cynthia fixes almost all the issues the Indra had:
- Fixed catch reliability by using the plunger system from the SLAB (modified to be longer)
- Improved plunger tube attachment strength (glue and more attachment area)
- Improved ramrod retention
- Made Cynthia slimmer
- Lengthened the stock to be Caliburn V4 length.
- Massively improved trigger feel
- Made the blaster lighter
- Less hardware cost
- Vastly improved front half rigidity
- A lot easier to assemble, disassemble, and swap springs.
- The thumbhole stock is easily removable, and is not required (on the Indra, the stock rod is required for blaster rigidity)
- Probably more stuff that I can't remember
There are many variant parts for Cynthia:
- Left and right handed parts
- Front Ends
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- Cynthia text or no Cynthia text
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- Ported and unported
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- Side rail or no side rail
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- Slim front end
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- Stubby short front end
- Two grip styles
- Several trigger styles
- Thumbhole stock or no thumbhole stock
- Fully enclosed plunger tube travel space, or open plunger tube space
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- Fully enclosed is good for people with beards, to protect yourself from hair-rippage during priming
- Tons of bolt handle options and lengths
- Locking bolt handle (for "realistic" bolt action coolness) or freely-moving bolt handle
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- Optional ball detent makes the bolt handle clicky as well, which feels really good.
- Optional muzzle with extra bottom picatinny (for bipod mounting)
- Optional picatinny rail replacements with no picatinny, for aesthetic sleekness
- Optional front grip
- Magwell panels with or without elastic holes, respectively for use with elastic or a spring on the mag release
- etc
Here are some good Picatinny sights if you want some:
- https://www.thingiverse.com/thing:2376150/files FrontPip and Pip in the Caliburn fileset are great iron sights.
- https://www.thingiverse.com/thing:1667830
- https://www.thingiverse.com/thing:2829229
- https://www.thingiverse.com/thing:5103083
As testing is done, I will update this part of the page with common spring/barrel combos for specific FPS numbers.
Keep in mind that SCARs usually reduce performance a bit.
Cynthia performance can be roughly approximated by using Talon Claw T4 performance estimates (in regards to barrel length and spring choice).
A full list of non-US sellers can be found here: https://www.stuffbysilly.com/wheretobuy
Hardware is available from these sellers:
- OutOfDarts: https://outofdarts.com/products/cynthia-hardware-kit
- SilverFoxIndustries: https://silverfoxindustries.shop/collections/new-products/products/cynthia-hardware-kit
Fully printed/assembled blasters are available from these sellers:
- OutOfDarts: https://outofdarts.com/products/cynthia-3d-parts-hardware-kit
- SilverFoxIndustries: WIP
Cynthia uses less than one 1kg PLA spool (if you were to print it all one color).
Infills:
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Black:
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- PlungerRod, PlungerCap, 100% Gyroid, 5+ walls.
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- ThumbholeStock needs a brim.
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- Everything else, 20% Gyroid, 5 walls.
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Orange:
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- BoltBase, BoltHandle, FrontGripKeeper, Catch, CatchPusher, PlungerHead, 100% infill, 5 walls.
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- BoltHandle, FrontGripKeeper, CatchPusher need brims.
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- Everything else, 20% Gyroid, 5 walls.
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Green:
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- MagwellBack, Magwell_L, Magwell_R, Grip_L, Grip_R, 100% infill, 5 walls.
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- All the tall green parts benefit from a brim.
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- To be safe, I recommend you print each tall part one at a time.
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- Everything else, 20% Gyroid, 5 walls.
Some parts have tight tolerances (mainly the dovetails in the catch area on the top cover print). Sanding and/or filing is recommended to make the dovetails go together smoothly. The top cover part can be broken if you try and force the dovetails together.
Full hardware list: https://docs.google.com/spreadsheets/d/1t6-6BqBstn1Ad-zIxsB0FqWth3nB00lHC9SVksAbSmY/edit?usp=sharing
H4 bar spec for those interested:
H4 bars can be cut down from C4 bars using the bar cutting tool (included in Cynthia files).
Video: https://youtu.be/j310YjRcwpU
Catch assembly: https://youtu.be/D5Ouzac-vMs
Plunger Tube Gluing Guide: https://www.youtube.com/watch?v=0BNuwjhlNqI (Super glue works, epoxy is best)
Thanks to my beta testers who contributed features and variant parts to Cynthia! Here's a list of who did what: (click this text)
- Chance made a new trigger for Cynthia, fixed some trigger wobble issues, and recommended adding a ball detent to the bolt handle.
Also, thanks to all my beta testers for their feedback while designing Cynthia. Couldn't have done it (this well) without you guys(and gals)!
- Chance
- WonderBoy
- BansheeIndian
- Greg from OutOfDarts
If you build any of my designs, I'd love to see yours! Feel free to message me on Discord (Sillybutts#5905) or tag me on a post on Reddit (u/SillyTheGamer).
If you are having issues with any of my designs, let me know on Discord (Sillybutts#5905) or Reddit (u/SillyTheGamer).
If you wish to print and sell this item, please contact me for licensing. I can be reached on Discord (Sillybutts#5905) or Reddit (u/SillyTheGamer). iamsillybutts@gmail.com email too. 你好！ 我擁有這個設計。 想生產請聯繫我. 你好！ 我拥有这个设计。 如果你想生产，请联系我.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Disclaimer: This is not a toy. This blaster is meant for hobbyists, not children. Blaster must be operated correctly to avoid injury. I am not responsible for any injuries from this blaster. Please use a bright/blaze orange muzzle and barrel cap on this blaster. Consult local laws before building this high powered blaster.
I don't charge for my files, so any donations or merch purchases would be greatly appreciated!
https://www.redbubble.com/people/Sillybutts/shop RedBubble full of fun Nerf-y sticker and merch designs!
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