OB1 5.1 Stainless Steel Outer Barrel (.45 marking) - Gold midcap m4 Earpiece type: 30mm high fidelity

Earpiece type: 30mm high fidelity dynamic circular speaker

This steel slide lock is made by precision CNC machines

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

visible green light

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

OB1 5.1 Stainless Steel Outer Barrel (.45 marking) - Gold midcap m4 Earpiece type: 30mm high fidelityThe 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