Slick AR15A1 upper receiver optimized for 3d printing. Remixed from: https://grabcad.com/library/lts-atlas-rev-4-thick-upper-rerceiver-short-ejection-port-1
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...Plus versions for your printing pleasure: one with a normal ejection port, and one with a half-port to strengthen the receiver.
Removed:
- Brass deflector
- Closure at charging handle port
- Extraneous hump on left side
- Text below ejection port
- Bolt cam clearance and hump
Added:
- A1 Carry Handle
- Reinforced ejection port cover mount
- Reinforced deleted gas tube port
