5.56 STR Rifle Build Kit

5.56 STR Upper with 

   -16” Barrel

   -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.