300AAC Blackout 'Special Ops Series' 7.5" Nitride Upper Receiver / 1:8 Twist / 7" MLOK Handguard  $209.99

SKU:Z54044
Color:Black
Caliber:300AAC Blackout
Gas System:Pistol Length
Barrel Length:7.5 inch
Twist Rate:1:8
Thread Pattern:5/8 x 24
Muzzle Brake:A2 Flash Hider
Handgaurd:7 inch MLOK

https://www.22mods4all.com/300aac-blackout-special-ops-series-7-5-nitride-upper-receiver-1-8-twist-7-mlok-handguard/