The 
NUPROL Mock NPQ15 Battery Box Tan
 is a lightweight, high-strength polymer dummy unit designed to house PEQ-style LiPo batteries on airsoft rifles, attaching to any standard 20mm RIS rail system. 
 
 
Key Features and Specifications
Functionality: This is a mock/dummy unit, meaning it does not contain any functional lasers or lights itself; its sole purpose is to provide an external storage solution for a battery.
Construction: It is made from high-strength polymer material, ensuring it is both durable and lightweight.
Compatibility: The battery box is designed to fit all standard 20mm accessory rail systems (Picatinny rails).
Battery Capacity: It can hold batteries up to 70mm x 45mm x 20mm in size.
Design: It is a replica PEQ-15 style box, which looks realistic on the rifle. It is ideal for front-wired airsoft guns with limited internal battery space.
Accessibility: The front end can be removed with an Allen key to fit the battery inside, and it features holes for routing the battery cables to the airsoft gun.
Aesthetics: The product comes in a tan color and includes a decal set to add realistic warning signs and markings found on genuine units.