OB1 5.1 Stainless Steel Outer Barrel (.45 marking) - Gold midcap m4 This steel slide lock is

This steel slide lock is made by precision CNC machines

Since this product is from Taiwan chinese brands sometimes do not fit

Compatibility: Standard M4 AEG/GBB/PTW/ platform airsoft rifles

POM piston ring NBR 80° Oring damper

Elastic Loop for underneath your boot

OB1 5.1 Stainless Steel Outer Barrel (.45 marking) - Gold midcap m4 This steel slide lock isThe 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. It is compatible with For WE Tech, Tokyo Marui, and other compatible Hi CAPA 5. 1 Series Airsoft GBB Pistols Highlighted