/ / / Flying Monkey Firearms 300BLK Complete Upper

Flying Monkey Firearms 300BLK Complete Upper


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  • Aero Precision assembled upper receiver
  • Midwest Industries Combat handguard
  • Flying Monkey Firearms 8.5” 300BLK barrel, 4140 steel, Melonite treated, 1:10 twist rate
  • Pistol length gas system and stainless-steel gas block
  • KAK Industries bolt carrier group
  • Mil-Spec charging handle
  • A2 Flash Hider – improved muzzle climb and flash suppression



***All Uppers are built to order, please allow 3-5 Days for shipping***

Additional information


None, Magpul MBUS Flip Up (+$75), Troy Fixed Sights (+$120.00), Troy Flip Up Sights (+$220.00)

Muzzle Device

A2 Flash Hider, Surefire Muzzle Break(+$160.00), Midwest Industries Blast Can (+$39.99)


Sig Sauer Romeo 5 (+$159.99), Sig Sauer Romeo 7TS (+