CSR-MK1 - Functional Blaster w/ Shell Ejection
BrewBoyMarch 12, 2025
Description
CSR-MK1: Canadian Space Rifle - Mark 1
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!
This is a fairly complex project that requires parts that may be difficult to find in your area. Make sure you read through this description before you start printing!
The CSR-MK1 is a shell-ejecting, bolt-action that fires printed projectiles or 6mm airsoft BB's. Perfect for extraterrestrial defense while repairing the Canada Arm or exploring cosmic landscapes!
Assembly Guide .pdf now out!
FEATURES:
- Assisted Bolt-action Cycling.
- 6 - Round Detachable Magazine.
- Folding Iron Sights.
- Optional Scope & Red-dot style sights.
- Optional Foregrip & Handguard.
UPDATE: March 21, 2025
- Added a Double-Stack magazine designed by @Silverback on Makerworld! - Silverback | Published - MakerWorld
- Added a Short Barrel Conversion (Short Barrel Cover, Short Barrel, Short Gas Tube, Short , Short Muzzle, Front Sight)
- Added Vertical Foregrip.
- Minor changes to bolt.
UPDATE: March 28, 2025
- Added updated magazine to fix issues with bullets jamming in the spring channel.
- Added Pistol Grip and new stock to raw model files
Printed Parts:
| PART: | WALLS: | INFILL %: | SUPPORTS/BRIM: | RECCOMENDED MATERIAL: |
| Upper Frame | 3-4 | 15-20 | Organic/Tree | Any |
| Lower Frame | 3-4 | 15-20 | Organic/Tree | Any |
| Barrel Cover | 3-4 | 15-20 | Organic/Tree | Any |
| Grip | 3-4 | 15-20 | N/A | Any |
| Stock | 3-4 | 15-20 | Organic/Tree | Any |
| Bolt | 4 | 15-20 | Organic/Tree | PLA, PLA+ or PLA-CF |
| Striker | 4 | 15-20 | Organic/Tree | PLA, PLA+ or PLA-CF |
| Charging Handle Bar | 4 | 15-20 | N/A | PLA, PLA+ or PLA-CF |
| Charging Handle Cap | 4 | 15-20 | Organic/Tree | PLA, PLA+ or PLA-CF |
| Trigger | 4 | 15-20 | N/A | Any |
| Striker Latch | 4 | 15-20 | N/A | Any |
| Barrel | 3-4 | 15-20 | Brim | Any |
| Gas Tube | 3-4 | 15-20 | N/A | Any |
| Muzzle | 3-4 | 15-20 | N/A | Any |
| Front Sight | 3-4 | 15-20 | N/A | Any |
| Rear Sight | 3-4 | 15-20 | N/A | Any |
| Magazine Catch | 3-4 | 15-20 | N/A | PLA, PLA+ or PLA-CF |
| Magazine | 3-4 | 15-20 | Organic/Tree | Any |
| Magazine Follower | 3-4 | 15-20 | N/A | Any |
| Magazine Base | 3-4 | 15-20 | N/A | Any |
| Stock Pad | 3-4 | 15-20 | Organic/Tree | Any |
| Stock Pad Connector x2 | 3-4 | 15-20 | N/A | Any |
| Grip-Stock Connector | 3-4 | 15-20 | N/A | Any |
| Barrel Cover Connector x2 | 3-4 | 15-20 | N/A | PLA, PLA+ or PLA-CF |
| Foregrip/Handguard | 3-4 | 15-20 | N/A | Any |
| Scope/Sight | 3-4 | 15-20 | Organic/Tree | Any |
Screws:
| Fastener | Number Needed |
| M3 x 8mm | 5 |
| M3 x 12mm | 10 |
| M3 x 14mm | 1 |
| M3 x 20mm | 2 |
| M3 x 25mm | 4 |
| M3 x 30 mm | 2 |
| M3 Hexnut | 22 |
Compression Springs:
| Spring Usage: | Wire Diameter: | Outer Diameter: | Length: |
| Bolt | 0.6 - 0.8 mm | 10 mm | 145 mm |
| *Striker | 0.8 - 1.0 mm | 10 mm | 220 - 300 mm |
| Magazine | 0.6 - 0.8 mm | 10 mm | 110 mm |
| Magazine Catch | 0.5 mm | 5 mm | 20 mm |
| Striker Latch | 0.5 mm | 5 mm | 20 mm |
*The striker springs length and wire diameter can be modified to your choosing, for various levels of firepower.
Springs can be found on AliExpress in 300 mm Lengths and cut to the needed length.
Chong-Su Spring Store - https://www.aliexpress.com/item/1005002523758634.html
