"Built on the proven Misriah ICWS platform, the MA40 is the standard-issue heavy rifle of the UNSC assault troops. It is an ideal weapon for stripping enemy shields because of its high rate of fire and heavy round, though the rifle is not renowned for accuracy or low ammunition consumption."
Bill of Materials - Firearm
MA-40
Overview
Required Tools
Tools you'll need to complete the build.
| Tool | Specification | Price | Supplier |
|---|---|---|---|
|
3D Printer
Required
X1C, A1, Ender 3, Prusa CORE, or the like. |
250^3 Build Volume | — | — |
| Metric Allen Wrenches Required | M2-M6 | — | — |
| Hammer or Mallet Required | — | — | — |
|
Soldering Iron
Required
... or some other way to install heat-inserts |
— | — | — |
|
Filament Dryer
Nice to Have
Only if you're using sensitive filaments (like PA6) |
— | — | — |
|
Drill Bits
Required
3/16", 3/32" |
Imperial | — | — |
Raw Materials
Consumable materials used during the build.
| Material | Category | Specification | Amount | Price | Supplier |
|---|---|---|---|---|---|
|
Epoxy or Superglue
Required
Needed for connecting the upper handguard parts together, as well as the front and back side-plates. |
adhesive | — | — | $7 | Amazon |
|
Lithium Grease
Recommended
Not required, but makes the mag release mechanism a little nicer. |
other | — | — | $3 | Amazon |
|
Filament - Any
Required
Most of the build can be done with any material. At your own discretion for brand, strength, infill, etc. |
filament | — | ~2.5kg | $110 | Push Plastic |
|
Filament - Strong
Required
This needs to be Nylon or PLA+. Required for the parts that go "bang". Polymaker Fiberon or PLA+ is totally acceptable as a substitute. |
filament | — | ~500g | $50 | Push Plastic |
Hardware & Non-Printed Parts
Screws, bolts, electronics, and other parts you'll need to source.
| Part | Specification | Qty | PPU | Subtotal | Supplier |
|---|---|---|---|---|---|
| M6x8 Required | Black Oxide, Socket Head | ×2 | $0.14 | $0.28 | BoltDepot McMaster |
| M5x12 Required | Black Oxide, Socket Head | ×2 | $0.12 | $0.24 | BoltDepot McMaster |
| M4x20 Required | Black Oxide, Socket Head | ×2 | $0.14 | $0.28 | BoltDepot McMaster |
| M4x8 Required | Black Oxide, Socket Head | ×14 | $0.12 | $1.68 | BoltDepot McMaster |
|
M4x35
Required
FCG Pins |
Partially Threaded, Socket Head | ×2 | $0.20 | $0.40 | BoltDepot McMaster |
| M3x8 Required | Black Oxide, Socket Head | ×9 | $0.11 | $0.99 | BoltDepot McMaster |
|
M3x5
Required
Comes in a pack. |
Black Oxide, Torx Head | ×14 | $0.15 | $2.10 | McMaster Non-Torx |
| M2x8 Required | Black Oxide, Socket Head | ×4 | $0.17 | $0.68 | BoltDepot McMaster |
|
Locknut
Required
FCG Retainer |
M4 | ×2 | $2.51 | $5.02 | McMaster |
| 3/16" Dowel Required | 1" | ×21 | $0.68 | $14.28 | McMaster |
|
3/16" Dowel
Required
The front "takedown" pin. |
1.25" | ×1 | — | — | McMaster |
|
3mm Dowel
Required
For the trigger linkage. |
40mm Length | ×2 | $3.82 | $7.64 | McMaster |
| 1/4" Quick-Release Pin Required | 3/4" Usable Length | ×1 | $6.04 | $6.04 | McMaster |
| M3 Stud Required | 8mm Shaft | ×2 | $6.56 | $13.12 | McMaster |
|
1/2 x 28 Panel Nut
Required
For the barrel extension |
1/8" Thick | ×1 | — | — | — |
|
Spring
Required
Stock & Electronics Retention |
0.3" OD, 0.75" Length | ×2 | $6.37 | $12.74 | McMaster |
| Magazine Spring Required | — | ×1 | — | — | — |
|
Sleeve Bearing
Required
For Trigger Linkage. |
M3x4 (6mm OD) | ×8 | $2.43 | $19.44 | McMaster |
|
Heat Insert Set
Optional
Minimum requirements: 15ct M4x7 11ct M3x6 14ct M3x4 4ct M2x4 |
Brass | ×1 | $17.00 | $17.00 | Amazon |
| M6 Heat Insert Required | ~6.4mm Length | ×2 | — | — | — |
|
Fire Control Group
Required
Non-milspec and/or flat triggers may require a slight modification to the printed trigger linkage. |
AR-15 Mil-Spec | ×1 | $35.00 | $35.00 | BCA PSA |
|
Main Trigger Linkage
Optional
You can try to print this if you're brave. |
Aluminum 0.125" | ×1 | $11.25 | $11.25 | SendCutSend |
|
AR-15 Bull Barrel
Required
Very important that the thick part of the barrel does not extend all the way to the muzzle. |
24" | ×1 | $110.00 | $110.00 | BCA BCA Alt |
|
CMMG 22LR Conversion
Required
This must be the conversion kit- the one with the faux-casing that sticks out the front. |
22LR | ×1 | $165.00 | $165.00 | CMMG PSA |
|
Charging Handle Rod
Optional
You likely can print this if you want to try, though I'd highly recommend a CF/ultra-stiff material. |
Aluminum 0.125" | ×1 | $2.12 | $2.12 | SendCutSend |
|
2020 Extrusion
Required
Anything between 15" and 17" should work. Center hole is not required. |
17" | ×1 | $12.07 | $12.07 | McMaster Amazon |
|
O-Ring ⁉️
Required
This is for retaining the flashlight lens. Probably not required with a better design. (Soon!) |
Thickness: 2mm; ID: 22mm; OD: 26mm | ×1 | — | — | — |
| Hose Clamp Required | SAE #28 | ×1 | $3.59 | $3.59 | Ace McMaster |
| Flashlight Lens Required | — | ×1 | $4.24 | $4.24 | McMaster |
| Total | $445.20 | ||||