JUNKER-SIDELOADER: Custom Bolt-Action Blaster
Print Profile(3)
Bill of Materials
- CompressionSprings x 1: https://www.aliexpress.com/item/1005002523758634.html
Description
JUNKER-SIDELOADER: Bolt-Action Blaster w/ Realistic Shell-ejection
IMPORTANT: This is a toy that fires a projectile! Never fire at pets or unwilling participants. This can damage drywall and eyeballs, use caution and protective eyewear. Never brandish this as a real weapon or bring it out in public. Just because you know it's a toy, doesn't mean other people will. Make sure to check your local laws regarding replica firearms/ toy guns. Enjoy, be safe, and be smart!
For my 5th shell ejecting blaster I decided to challenge myself with a side-loading magazine, and I am very happy with the results. As always, I am a self-taught designer with no formal education in 3d modeling just trying my best to make toys that I think are cool. I do my best to create high-quality models, but I realize that there is room for improvement in all of my designs and documentation. Please do not hesitate to reach out to me with any questions, comments or concerns I will do my best to help. All of the files I have provided are in .step format so that anyone is able to easily modify, remix or remake for any of your own wants/needs and I encourage people to do so! If you're still here, Please Enjoy the JNKR-S!
This build requires extra non-printed hardware (Screws, nuts & springs) and a little bit of post-processing (Sanding, filling & support removal). Make sure your are ready for a project before you start this print!
UPDATE: JAN 8, 2025
- Added more attachments and customization options (2 new stocks, snail drum magazine, Lengthened front cover with barrel shroud)
UPDATE: JAN 13, 2025
- JUNKER-SX print profile and updated parts added.
UPDATE: JAN 31, 2025
- Added short angled handguard
UPDATE: FEB 11, 2025
- Added JNKR-TYPE 4 profile and parts!
- Features a longer barrel, decorative gas tube, barrel mounted sites, Banana magazine, angled for grip and rails with a flashlight mount.
FEATURES:
- 10-Round Side-loading Magazine.
- Collapsing Stock.
- Folding Sights with adjustable Sight-Ring.
- Printed, Reusable 2 part Ammo (Projectile & Shell).
- Realistic Shell-Ejection.
- Handguard & Foregrip Option.
- Bolt-Action Cycling.
- Optional Display/Turret Mount.
VIDEO:
(Youtube shorts don't seem to be working here, but videos of it functioning can be found on my Youtube @brewboyblasters in the “Shorts” section)
PDF BUILD GUIDE ADDED
PRINTED PARTS:
Recommended Filament for functional components: PLA or PLA+
Why?: PLA and PLA+ have the right mix of flexibility and strength for the functional components in this design. This design has only been tested using these filaments but other filament types or PLA with different infill may work for you.
Filaments to avoid for the functional components: PETG, PET, Silk PLA, Matte PLA
Why Not?: These filaments are either to brittle or have weak layer adhesion, which makes them a poor choice for the functional components in this model as they may not stand up to the impact force or tension required of them.
- I used PLA-CF for the black parts because I like the way it looks but it is not necessary.
PRINT ORIENTATION: If you are using the raw model files to set up your own plates to print, most files WILL NOT load into the slicer in the correct print orientation. The Auto-Orientation feature in the slicer should not be trusted for all parts, I would recommend looking at how I have the parts oriented in my print profile as they are essential for the strength of the functional components.
Parts with a * after the name are considered Functional Components.
| PART: | WALLS/TOP/BOTTOM | INFILL %: | SUPPORTS: | NOTES: |
| Lower Frame | 3+ | 15% (Gyroid) | Hybrid-Organic | |
| Upper Frame | 3+ | 15% (Gyroid) | Hybrid-Organic | |
| Front Cover | 3+ | 15% (Gyroid) | Regular | Designed for colour change where barrel starts. |
| Rear Cover | 3+ | 15% (Gyroid) | Regular | |
| Barrel | 3+ | 15% (Gyroid) | None | |
| Muzzle | 3+ | 15% (Gyroid) | None | |
| Grip | 3+ | 15% (Gyroid) | None | |
| Foregrip | 3+ | 15% (Gyroid) | None | |
| Handguard | 3+ | 15% (Gyroid) | None | |
| Trigger* | 4+ | 15% (Gyroid) | None | |
| Bolt* | 4+ | 15% (Gyroid) | Organic | |
| Charging Handle Bar* | 4+ | 15% (Gyroid) | None | |
| Charging Handle Cap* | 4+ | 15% (Gyroid) | None | |
| Striker* | 4+ | 15% (Gyroid) | Regular | |
| Striker Latch* | 4+ | 15% (Gyroid) | None | |
| Trigger Guard | 3+ | 15% (Gyroid) | None | |
| Magazine | 3+ | 15% (Gyroid) | None | |
| Magazine Latch* | 3+ | 15% (Gyroid) | None | |
| Magazine Base | 3+ | 15% (Gyroid) | None | |
| Magazine Follower | 3+ | 15% (Gyroid) | None | |
| Stability Block | 3+ | 15% (Gyroid) | None | Prevents the Upper frame and lower frame from sliding. |
| Stock Rail | 5+ | 15% (Gyroid) | None | x2 (Mirror in Slicer) |
| Stock Rail Cap | 3+ | 15% (Gyroid) | None | x2 |
| Stock Latch* | 3+ | 15% (Gyroid) | None | x2 |
| Stock | 3+ | 15% (Gyroid) | None | |
| Stock Pad | 3+ | 15% (Gyroid) | None | Can be printed in TPU |
| Sight Base | 3+ | 15% (Gyroid) | None | |
| Adjustable Sight | 3+ | 15% (Gyroid) | None | |
| Adjustable Sight Ring | 3+ | 15% (Gyroid) | None | Scale up 1-2% in slicer for a tighter fit. |
| Bullet | 3+ | 15% (Gyroid) | None | |
| Casing | 3+ | 15% (Gyroid) | Brim Recommended |
HARDWARE:
| M3 Screws & Nuts: | |
| Length (mm): | Number Needed: |
| 8 mm | 4 |
| 12 mm | 3 |
| 16 mm | 2 |
| 18 mm | 1 |
| 25 mm | 6 |
| 30 mm | 1 |
| Hex Nut | 12 |
| Compression Springs: | |||
| Wire Diameter (mm): | Outer Diameter (mm): | Length (mm): | Use: |
| 0.5 | 5 | 25 | Striker Latch |
| 0.5 | 5 | 25 | Magazine Latch |
| 0.5 | 5 | 25 | Stock Latch |
| 0.6 - 0.8 (0.8mm is recommended for more reliable cycling) | 10 | 130 | Magazine |
| 0.8 - 1.0 | 10 | 110 | Striker |
Where to buy springs? : I use AliExpress for all my 10mm diameter springs. Finding springs with the correct wire diameter and outer diameter on AliExpress is fairly easy, but the you will most likely need to buy springs longer than what is listed and cut them to the proper length with wire cutters.
Example:
https://www.aliexpress.com/item/1005002523758634.html - This is the store I use for my springs, but it may not be available in all regions. Use it as a guide for purchasing the most cost effective option in your area.
TOOLS:
- Screwdriver/Allen Key
- Sandpaper
- Metal Files
- Superglue or preferred PLA adhesive
- Small Pliers (For support Removal)
- Wire cutters
PARTS:
INTERNAL PARTS:
SCREWS:
COMPRESSION SPRINGS:
Documentation (1)
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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