Grid Defense 10.5" .300 Suppressor Series Upper Receiver 

Upper Specifications

• Mil-Spec Upper Design
• Machined from 7075-T6 Forging
• Mil-Spec dust cover and forward assist
• Made in the USA
• 15.2" Free Float M-LOK Suppressor Series Handguard
• Oversized handguard designed to recess a suppressor
• 1.65" ID

Barrel Specifications

• 10.5" Heavy Profile Barrel
• 4150 Chrome Moly Vanadium
• Chambered in .300
• Black Nitride Finish
• 1:8 Twist Rate
• 5/8x24 Thread Pitch
• .750 Pistol Length Gas System