Nine Ball Outer Barrel Adjustment Shim Ring Set for V2 M4/M16 AEGs (GG06-15)

Features:

• Eliminates gaps that may occur in between barrels and the barrel nut, upper receiver, and outer barrel, or anywhere in between
• Ensures stability of outer barrel and RIS systems when installing
• Prevents any outer barrel or rail alignment issues
• 3 differently sized shims to fit any situation