247mm for TM MP5A4・A5・SD5・SD6・β SPEZNAZ
Carbon Steel ,
Inner Dia. 6.03mm ,the tolerance is 10 micron class accuracy.
We aim “SMART BARREL will be standard for Airsofts”
Stainless steel series are the best quality,SMART BARREL is better choice.
We process plating for prevention from rust.
If you want lower cost and precision barrel, we recommend SMART BARREL first.
This barrel has W Grooving for side to have compatibility TM AEG with TM M14 chamber