Nerf SPAS-12 Styled Collapsible Stock by ExplodiumLeo

Last crawled date: 3 years, 3 months ago

"...Clever girl!"
This is a functional, collapsible Nstrike Nerf shoulder stock loosely based on the SPAS-12 (minus the hook). This project first came about as a way to supplement the delightfully excessive Nerf Spas 12 body kit by ehdrien, and as the only logical outcome to Rule of Cool compliance. After working on/off on this design during the lock-down, the end result is cartoonishly wide yet the proportions remain somewhat practical. For obvious reasons however, whether it is HVZ-worthy remains to be seen.
It should be a straightforward print, but the assembly is something like a 2/5, aka intermediate difficulty. The main reason for this is that the formation of the arms involves a 3mm peg-tapping process.
I got the small compression springs used in this project as part of a bulk assortment on Amazon years ago, although the spring requirements here aren't exact so they should be switchable with anything close enough. I imagine they could be cannibalized from ballpoint pens or old spare blasters if you have any of those laying around. If you're into modding, a stock blaster catch/trigger/lock spring could also do the trick provided it's the right length.
More detailed instructions are included in the README.txt file.
Enjoy the build, and happy hunting. If anyone gets around to building this, I'd love to hear your feedback!
Edit: a friend pointed out to me the SPAS12 was something of a cinema icon, traditionally to be deployed in solemn/ritual fashion shortly before raptor lunch break. My familiarity with this stock was limited exclusively to video games before, so this is something I wish I'd noticed! It does give me more confidence this model works both mechanically and visually in the way it's supposed to.
Revisions:2020-09-04: SABv2 adds an offset of 1mm. Fit was too tight in v1 when accounting for the detent pin. Also did a minor cosmetic fix on the deco. Use this one instead of SABv1.
Features
Modular Nstrike stock adapter with spring lever
Detent pin for locking the pivoting arm into deployed/folded position
Integrated Magholder or Mega Dart Holder X 4
Fully printable on a 120mm X 120mm build plate
Requirements
Hardware:
(2) 7/32" x 11/16" compression spring
(1) 1/4" x 13/32" compression spring
(2) 12mm M3 Screws
(2) 20mm M3 Screws
(4) M3 Hex Nuts
(2) 12mm M4 Screws
(4) 20mm M4 Screws
(6) M4 Hex Nuts
(4) M4 Washers

Required Tools:
Hammer (for peg-tapping)
Screwdriver/Hex key set for the M3 and M4 screws
Small adjustable wrench/spanner
Hobby knife and/or one of those disposable swivel head deburring tools.
Glue (preferably epoxy, but regular all-purpose glue would work too)

Optional Tools:
3D printing pen (for extra welding step)
Needle/Diamond hand files (for leveling after welding, also peghole cleanup)
Glass nail files (for finishing/buffing after filing)
Flat-head screwdriver (to be used as a punch/chisel)

References
Nerf Spas 12 body kit by ehdrien
Self-explanatory. I used the overall dimensions of the pump grip and cross-referenced a real steel assembly diagram to eyeball the scale. As I do not own a Mega blaster, I also used the Mega dart carrier dimensions on the Magnus kit by the same designer.

Nerf stock attachment by Demian777
Reverse-engineered Nstrike stock adapter. Ran into some printability issues so I restarted from scratch and used all new measurements, but the initial concept remained the same.

Nerf Magazine (Clip) Carrier - Molle Compatible by Meishel
Created a squished version of this magholder for use in the stock arm.