5.56 STR Upper with
-16” Nitride Barrel
-Heavy Profile
-1:8 Twist
-Carbine Gas
-A2 Handguards (Optional Quad Rail)
- Railed Hi-Rise Gas Block
-Standard Charging Handle
-BCG
Lower Parts Kit
Buffer Tube Kit
M4 Stock
*Echo 3 Ordnance rifle barrels have a sub-MOA guarantee when using good ammo and proper shooting techniques.