he OB1 5.1 Outer barrel is precision CNC machined out of stainless steel for greatly improved durability. The finish comes from the titanium nitride coating which is often used with real steel competition firearms for its excellent scratch and abrasion resistance. Its fixed barrel design enhanced the stability during cycling.
Stainless Steel material with CNC machined
Compatible with M11 threaded adapter
2 markings (ie .45; .40) engraved
For Hi-Capa 5.1
Available in Raw Silver, Titanium Black and Titanium Gold
*PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation/fitting. Fitting may be needed as the condition of each airsoft gun might be different. Regular maintenance is needed for all airsoft guns in order to keep it in good working condition and reduce wear out issue on parts.