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

Matrix M4 CQB-R Convertible Barrel Adapter / Extension Set (14mm-)

Applications:
- Instantly increase outer barrel length of any AEG with 14mm negative thread.
- Convert your CQB-R to a M4 length barrel. (Still allowing your flash hider / mock silencer)
- Convert your M4 to use free float M16 type R.I.S.
- Convert your VFC / BOYI (Echo1) Scar to Longer version.
- Convert Any AEG barrel with 14mm negative thread to longer outer barrel. (For specific attachments such as over barrel silencers.) 

Specifications:
- High Grade Aircraft Grade Steel Construction.
- Precision 14mm negative counter-clockwise thread.
- Each extension comes with inner 14mm thread and outer 14mm thread.

Long : 110mm (including thread) 
Medium: 55mm (including thread) 
Short: 27.5mm (including thread)