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Printable AR-15 80% Lower Receiver Milling Jig

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Print Profile(1)

All
P1S
P1P
X1
X1 Carbon
X1E
A1
H2D
H2D Pro
H2S
P2S
H2C
X2D
A2L

0.16mm layer, 2 walls, 25% infill
0.16mm layer, 2 walls, 25% infill
Designer
4.6 h
1 plate
5.0(23)

Open in Bambu Studio
Boost
919
2911
47
42
1.7 k
508
Released 

Description

This Jig is meant to be used for 80% Arms Gen 1 self-aligning milling jig for making the proper cuts on a AR15 80% lower receiver. The alterations I made on this jig were that I removed the magwell bumps to accommodate all non-milled wall magwell billets. The original post had magwell vertical walls which would only fit slim magwell walled billets. I printed mine with PLA matte but tested with PLA+ and ASA successfully. 

 

For milling instructions on how to use this jig, please use the provided documentation.

 

Print Settings


Rafts:
No (brim on spacers)


Supports:
Yes


Resolution:
0.16

 

Infill:
25

 

Filament brand:
PolyMaker

 

Filament material:
PLA, PLA+, ASA

 

Notes:
Be sure to print with proper settings to minimize warp in whichever filament you choose to use for this, as you need for everything to be precise. Supports are necessary for some of the side holes. Use as low of an infill as possible for these supports to make them easy to remove.

 

Additional hardware:

-Router

-(4) 4.5-4.8mm bolts with nuts and washers for takedown through-holes (the tighter the tolerance the better)


Documentation (1)

Assembly Guide (1)
80_arms_easy_jig.pdf

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