DoubleStar Corp Rifle Length Flattop Barreled Upper - 20"

Manufactured by DoubleStar Corporation
Manufactured by DoubleStar Corporation
(0) No Reviews yet

Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



If you’re looking to build an AR-15 rifle with a classic aesthetic, Double Star has the barreled upper receiver for you. This DoubleStar flat top upper receiver features a 20” HBAR barrel with a rifle length gas system and front sight post gas block and an A2 flash hider. The barrel is machined from 4140 steel and black Nitride finished and chambered in 5.56 NATO and a 1:9 twist rate.  The rifle length A2 handguard adds to the classic look while protecting the gas system. The receiver itself is forged from 7075-T6 aluminum, hardcoat anodized, and features T-markings for optic placement. The DoubleStar Barreled Upper Receiver is the perfect match for your new lower build.

  • 20” HBAR barrel
  • Chambered in 5.56 NATO
  • 1:9 twist rate
  • Rifle length gas block
  • 4140 chrome moly steel
  • A2 flash hider
  • Black Nitride finish
  • 7075-T6 aluminum flat top receiver
  • Hardcoat anodized
  • T-marked
  • 100% made in America
See More


Barrel CoatingSalt Bath Nitride
Barrel ContourHBAR
Barrel Length20
Barrel LiningSalt Bath Nitride
Barrel Material4140 Chrome Moly Steel
BrandDoubleStar Corporation
Caliber Gauge5.56 NATO
Gas System LengthRifle
Gas System TypeDirect Impingement
HandguardRifle Length Drop-in Handguard
Muzzle DeviceA2 Flash Hider
Thread Pattern1/2 X 28
Twist Rate1:9

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

No reviews available

Be the first to Write a Review