This is the Kincaid Arcade Type-002 MK-2 "Sparrow"

The inspiration for the name came from Matthew 10:29-31 (NIV):
"Are not two sparrows sold for a penny? Yet not one of them will fall to the ground outside your Father’s care.
And even the very hairs of your head are all numbered. So don’t be afraid; you are worth more than many sparrows."

Basically, I had designed a small nerf sidearm. Insignificant, and easily forgettable. But just because it was small
doesn't mean it is insignificant or worthless. If a zambie forgets I have it, they're going to get stunned.

Thus, I named it the "Sparrow".

----

Without any form of sanding in the cylinder, the blaster gets an average of 76.6 feet per second. I used this as a
sniper pistol at my university's Humans Versus Zombies event. With Adventure force Waffle-headed darts, it's quite
accurate. I once got a dart within 2 or so feet of a zambie at 100 feet away by angling the blaster at 45 degrees.

The zambie later gave me congratulations on my design :)



This design is licensed under CC BY-SA 4.0. It was uploaded to KincaidArcade.com on 1/1/2022.
https://creativecommons.org/licenses/by-sa/4.0/




NOTE:
 There is no N-Strike barrel lug
 Sanding the inside of the cylinder smooth where the plunger goes BEFORE greasing it will further increase FPS.
 Part dimensions may need to be adjusted based on how the printer prints it.

 Files sliced for the Tenlog TL-D3 pro 3d printer will not work with an ENDER printer... they will need to be re-sliced.


Parts needed outside of 3d-printed pieces
     - 1x  6kg spring used for upgrading the NERF Firestrike (putting in a 9kg spring improves performance negligibly)
		- 6kg: https://www.amazon.com/3D-Toys-N-Strike-Firestrik-Blasters/dp/B08L3F1GXZ/ref=sr_1_5?dchild=1&keywords=firestrike+spring&qid=1633009291&sr=8-5
                      - 6kg yields ~76.6 feet per second, slightly better than NERF elite blaster
     - 2x  0.4x5x20mm compression spring (14 coils)
         - wire diameter, outer diameter, length.
         - has flat ends
	 - I got these from: https://www.amazon.com/CREEYA-Compression-Assortment-Different-Stainless/dp/B08KD5Q2P7/ref=sr_1_1?crid=20QZPODN82GRZ&keywords=CREEYA+spring&qid=1641049321&sprefix=creeya+spring%2Caps%2C92&sr=8-1
     - 1x  O-ring 27x3mm (27mm outer diameter, 3mm ring thickness) 
     - Silicone grease
         - To grease o-ring and everywhere it contacts the cylinder
         - BLASTER WILL NOT WORK WITHOUT GREASE
             - Observe performance before and after grease -- quite amazing!
     - 6x  #6 x 1" pan phillips screws




Grams of filament based on Cura estimation

NOTE ON SUPPORT STRUCTURES:
- Adjust settings so that it makes a z-shapped support pattern, and therefore is easy enough to remove.
     - Set "Support Wall Line Count" to 0
     - Set "Connect Support Zig Zags" to 0

Blaster Left Side MK-2.01
 20% cubic infill
 Top/bottom/walls 2mm thick
 138.1g filament
 est. 15 hours, 11 mins

Blaster Right Side MK-2.01
 20% cubic infill
 Top/bottom/walls 2mm thick
 140.1g filament
 est. 15 hours, 45 mins, actual 15 hours, 43 minutes

Catch MK-2.01
 100% infill
 4.2g filament
 est. 30 mins, actual 30 minutes

Combined Barrel, Pressure Chamber, and Dart Holders MK-2.01
 20% cubic infill
 Top/bottom/walls 1mm thick
 110.6g filament
 est. 13 hours, 48 minutes

Plunger MK-2.01
 20% cubic infill
 Top/bottom/walls 2mm thick
 17.7g PLA
 7.7g PVA
 est. 4 hours, 50 mins

Trigger MK-2.01
 100% infill
 11.4g filament
 est. 1h 28 mins


TOTALS:
 422.1 grams of PLA ~ $6.33
 7.7 grams of PVA ~ $0.54

 