300BLK AR Pistol Upper – 10.5″ Barrel 1:8 Twist – 10″ M-lok Rail

Description

Complete built upper receiver:

• 10.5″ barrel chambered in 300BLK with a 1:8 twist
• Birdcage flash hider
• Pistol length gas system
• 10″ m-lok handguard
• Flat-top mil-spec upper receiver with installed dust cover and forward assist
• No BCG or charging handle