APS HKKOTSU - M4 CQB-R Convertible Barrel Adapter / Extension Set (Thread: 14mm- Negative)

Features:

• Easy to install
• Fit your mock suppressors / tracer units flush to the rail
• 14mm Negative threads
• Extends outer barrel to desired length
• Helps hide long inner barrels 

Manufacturer:  APS

Specifications: 

 Size: 0.75” - 1.6” - 3.75” IN

Weight:  0.8

Compatibility: Thunder B cores 

Material:  Plastic

Package Includes: 1 short barrel extension, 1 medium barrel extension, 1 long barrel extension