Stag Arms A3 LH Flattop Upper Receiver Assembly

Manufactured by Stag Arms
SKU: STAG310412
MPN: STAG310412
Manufactured by Stag Arms
1 Review

In Stock

Standard orders will ship out same day if ordered by 3:30pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The Stag Arms A3 LH Flat Top AR-15 Upper Receiver features left side ejection for left handed shooters. It is built to Mil-Spec allowing compatibility with aftermarket components. The A3 left hand upper receiver is made from high quality aluminum and a durable hardcoat anodized finish. Perfect for building a rifle for left handers.

  • Left side ejection
  • Mil-Spec dimensions
  • Assembled with port door and forward assist
  • Hardcoat anodized finish
See More


AssemblyAssembled Uppers
BrandStag Arms
Feed RampsM4
FinishHardcoat Anodized
Forward AssistAssembled with Forward Assist
Port DoorAssembled with Port Cover
Receiver Material7075-T6 Aluminum
T MarksT-Marked

Ratings & Reviews

1 review

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Great quality

by -

I own a few of these left handed uppers, fit and finish were perfect. PA as usual got it here quick.