- "Outer barrel with a striking carbon fiber look!"
- "Contributes to gun weight reduction, enhancing mobility!"
- "Available in three sizes, designed for use with our 'Standard M4 Outer Barrel Base Short.'"
 
This ultra-lightweight outer barrel piece is made primarily from carbon fiber, giving it a distinctive look. It is designed to be paired with our 'Standard M4 Outer Barrel Base Short,' allowing it to function as an outer barrel of approximately 5 inches, 7 inches, or 9 inches in length.
 
It can also be installed on our series of outer barrel bases for the Standard, Next-Generation, and Gas Blowback M4 series, as well as SIG AIR MCX/MPX models (the total length will vary depending on the base). Additionally, fine length adjustments can be made by attaching our 'M4 Outer Barrel Piece' at the base.
 
**Barrel Weight:**  
- 5-inch: Approx. 27g  
- 7-inch: Approx. 34g  
- 9-inch: Approx. 40g  
**Barrel Length:**  
- 5-inch: Approx. 108mm  
- 7-inch: Approx. 158mm  
- 9-inch: Approx. 209mm  
 
14mm Counter-Clockwise (CCW)
 
Compatible Outer Barrel Bases/Pieces: 
- Standard M4 Outer Barrel Base  
- Standard M4 Outer Barrel Base Short  
- Next-Generation M4 Outer Barrel Base  
- M4 A1 MWS Outer Barrel Base  
- SIG AIR MCX Outer Barrel Base & Gas Block Base Set  
- SIG SAUER ProForce MPX Electric Gun Outer Barrel Base & Battery Spacer  
 
*Note: This product cannot be directly attached to a gun by itself. Please use it in combination with one of the outer barrel base series listed above.

*Ensure that the inner barrel is long enough to reach the muzzle end. If the inner barrel is shorter than the outer barrel, BB pellets may hit the inside of the outer barrel and cause damage.

*Due to the structure, if you tighten the outer barrel base, barrel piece, or muzzle first, the inner barrel may not fit. In such cases, insert the inner barrel first before tightening.

*Due to the nature of carbon fiber, applying excessive force may cause damage.