"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
Nice to Have
Every tool is a hammer |
— | — | — |
|
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 | — | — |
| Patience Required | — | $0.00 | — |
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 generally recommended. |
filament | — | ~500g | $50 | Polymaker |
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 | ×4 | $0.14 | $0.56 | BoltDepot McMaster |
| M5x12 Required | Black Oxide, Socket Head | ×4 | $0.12 | $0.48 | BoltDepot McMaster |
| M4x20 Required | Black Oxide, Socket Head | ×4 | $0.14 | $0.56 | BoltDepot McMaster |
| M4x8 Required | Black Oxide, Socket Head | ×14 | $0.12 | $1.68 | BoltDepot McMaster |
| M3x30 Required | Black Oxide, Socket Head | ×8 | $0.19 | $1.52 | BoltDepot McMaster |
| M3x16 Required | Black Oxide, Socket Head | ×4 | $0.12 | $0.48 | BoltDepot McMaster |
| M3x12 Required | Black Oxide, Socket Head | ×2 | $0.12 | $0.24 | BoltDepot McMaster |
| M3x8 Required | Black Oxide, Socket Head | ×11 | $0.11 | $1.21 | BoltDepot McMaster |
|
M3x5
Required
Comes in a pack. |
Black Oxide, Torx Head | ×18 | $0.15 | $2.70 | McMaster Non-Torx (B.D.) |
| M3 Set Screw Required | 8mm | ×1 | $6.79 | $6.79 | Amazon McMaster |
|
M3 Ball Point Set Screw
Required
These are used for positioning the laser. They probably don't need to be ball point but I like them. |
M3x7 | ×2 | $4.00 | $8.00 | Amazon McMaster |
| M2x8 Required | Black Oxide, Socket Head | ×20 | $0.17 | $3.40 | BoltDepot McMaster |
|
M2x5
Required
Head must be <= 1.1mm in height. |
Flat Head | ×4 | $0.05 | $0.20 | Bolt Depot |
| M5 Nut Required | — | ×2 | $0.07 | $0.14 | BoltDepot McMaster |
|
Spring Plunger
Required
Safety Detent |
1/4"-20 | ×1 | $7.73 | $7.73 | McMaster |
|
Spring Plunger
Required
Potentiometer wipe for magazine |
8-32 x 0.6" | ×1 | $19.00 | $19.00 | McMaster |
| 3/32" Dowel Required | 7/8" | ×1 | $10.95 | $10.95 | McMaster |
|
3/32" Dowel
Required
Middle cowling pins |
0.75" | ×2 | $10.07 | $20.14 | McMaster |
|
5/32" Dowel
Required
FCG Pins |
1.5" | ×2 | $6.00 | $12.00 | McMaster |
| 3/16" Dowel Required | 1" | ×19 | $0.68 | $12.92 | McMaster |
|
3/16" Dowel
Required
The front "takedown" pin. |
1.5" | ×1 | $17.75 | $17.75 | McMaster |
| 3mm Dowel Required | 14mm | ×1 | $2.26 | $2.26 | McMaster |
| 3mm Dowel Required | 38mm | ×2 | $3.47 | $6.94 | McMaster |
| 1/4" Quick-Release Pin Required | 3/4" Usable Length | ×1 | $6.04 | $6.04 | McMaster |
| M3 Stud Required | 8mm Shaft | ×1 | $6.56 | $6.56 | McMaster |
| M3 Stud Required | 12mm Shaft | ×1 | $6.56 | $6.56 | McMaster |
|
1/2 x 28 Thread Adapter
Required
For the barrel extension |
1/2 x 28 to 3/4 x 16 | ×1 | $11.00 | $11.00 | Amazon |
|
Spring
Required
Stock & Electronics Retention |
0.3" OD, 0.75" Length | ×10 | $1.20 | $12.00 | McMaster |
| Magazine Spring Required | — | ×1 | $10.00 | $10.00 | Black Dog |
|
Sleeve Bearing
Required
For Trigger Linkage. |
M3x4 (6mm OD) | ×8 | $0.67 | $5.36 | Amazon McMaster |
|
Heat Inserts
Required
Minimum requirements: 2ct M5x7 15ct M4x7 16ct M3x6 24ct M3x4 22ct M2x4 Not all heat inserts are created equal. Crappy inserts can be too thin and not work properly. The Amazon link here should be okay, but not confirmed yet. |
Brass | ×1 | $17.00 | $17.00 | Amazon Set |
| M6 Heat Insert Required | <= 7mm Length | ×4 | $2.25 | $9.00 | Amazon |
|
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 |
|
AR-15 Bull Barrel
Required
Very important that the thick part of the barrel does not extend all the way to the muzzle. A rifle-length gas system will fit, even though the gas system is not used. |
24" | ×1 | $110.00 | $110.00 | BCA BCA Category |
|
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 |
| AR-15 Ejection Port Cover Required | Rod, Spring, and Cover with Detent | ×1 | $14.50 | $14.50 | PSA PSA-Alt |
|
2020 Extrusion
Required
Anything between 17" and 18" should work. Center hole is not required. The tolerances of this rail are important. McMaster rails seem to be very tight and need to a hammer or mallet to install, while Amazon ones are looser which is preferred. |
18" | ×1 | $12.07 | $12.07 | Amazon |
| Hose Clamp Required | SAE #28 | ×1 | $2.24 | $2.24 | BoltDepot McMaster |
|
Flashlight Lens
Required
This is a 1" diameter, 1/8" thick piece of any clear material. |
— | ×1 | $4.24 | $4.24 | McMaster |
| BallBearing??? Required | For the magazine | ×1 | — | — | — |
| Total | $564.22 | ||||