JBU 3.25in MSS Barrel Extension

JBU 3.25in MSS(Modular Suppresor System) Barrel Extension features: 

JBU (MSS) Modular Suppressor System   
Aluminum Alloy Construction
14mm Counter Clock Thread Flash-hider
3.25in x 1.5 in dimension 
4pc Set, includes Flash-hider  
Unique JBU Serial Number  
Fits All 14mm CC Thread AEGs 

JBU 3.25 in x 1.5in, Modular Suppressor System, Includes Aluminum 1pc Version & QD Steel Phantom flash hider.  Constructed with High Strength Aluminum Alloy and Unique Serial Number, (4pc Set) includes: barrel cap, base extender, flash-hider adater, & flash-hider.   Modular Suppressor System can be extended with Item# SDJBU15 or SDJBI16, each unit will add or subtract ~3.25in.