A4 Upper Receiver
M4 Feed Ramps
Black Hardcoat Anodized Mil-Std-171 Type III
Precision Machined to Mil-Spec Tolerances
Forged From High-Grade 7075 T6 Aluminum
Mil-Spec Forward Assist and Ejection Door
*A Upper Receiver MUST be selected from the drop down menu above.
4.75" 9MM (9x19) Barrel
*A Barrel MUST be selected from the drop down menu above.
Mil Spec Barrel Nut. A hand guard is NOT included.
A2 Half Cage
*A different muzzle device can be selected from the drop down menu above.
Product Code: MAS-049M0-MDBN-00
The Bolt Carrier Group and Charging Handle are not included. Please see "Related Items"
below or go to our Bolt Carrier Group and Charging Handle Section to choose one.
All barreled uppers are head spaced and test fired to ensure function.
ALL LAWS APPLY. IT IS THE RESPONSIBILITY OF THE BUYER TO UNDERSTAND ALL LAWS REGARDING PURCHASE AND OWNERSHIP OF THIS UPPER. WE STRONGLY URGE YOU TO CONTACT YOUR LOCAL FFL AND/OR THE ATF WITH ANY AND ALL QUESTIONS TO MAKE SURE YOU UNDERSTAND THE LAW BEFORE PURCHASING THIS ITEM.