Geissele Automatics Blemula AR-15 Barreled Upper Receiver 5.56 NATO - Black - 14.5" - Pin & Weld Closed-Tine

Manufactured by Geissele Automatics
SKU: 05-2313B-BLEM
MPN: 05-2313B-BLEM
Manufactured by Geissele Automatics
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Standard orders will ship out in 1 business days or less if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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Note: This Geissele Automatics Upper Receiver is a blemished model. The product you receive may have scratches or marks from manufacturing. These are purely cosmetic marks and do not affect function.

Laser engravings, Logo's, and QD sling swivel slots may differ from the photographs above.

Geissele Automatics has made quite a name for themselves within the industry with their exceptional quality control on all of their products. This extreme quality control process inevitably leads to some products not making on the shelf due to minor imperfections in the finishes. This is where the Geissele Blemula products come in. This 14.5" Geissele Automatics Blemula AR-15 Barreled Upper Receiver chambered in 5.56 NATO is a blemished version of the normal Super Duty and includes all of the same features. This barreled upper features a 14.5" cold hammer forged barrel that is pinned and welded with a Surefire Closed-Tine. The barrel meets up to a 7075-T6 aluminum upper receiver that is finished in a black hardcoat anodizing to protect it from corrosion and wear. Wrapping the cold hammer forged barrel is Geissele's 14” SMR MK16 free float handguard that features M-LOK attachment slots on seven sides. This AR-15 barreled upper receiver group does not come with a bolt carrier group or charging handle.

  • Forged 7075-T6 aluminum Blemula receiver
  • Black hardcoat anodized
  • 14.5” cold hammer forged barrel
  • Chambered in 5.56 with a mid-length gas system
  • Threaded 1/2x28
  • 14” SMR MK16 free float M-LOK handguard
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Barrel Coating
Barrel ContourMedium
Barrel Length14.5
BrandGeissele Automatics
Caliber Gauge5.56 NATO
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Muzzle DeviceSurefire Closed-Tine Flash Hider Pinned and Welded
Thread Pattern1/2 X 28
Twist Rate1:7
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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