Airsoft3D M4 M16 Receiver Picatinny Mount Adapter Type I (20mm) for Airsoft / SoftAir Rifle - TeleScopix Shoulder Stock System Color:Gold It may not be suitable

It may not be suitable for real firearms

And it's easy to pop the battery off

com/thing:1388709 (by Donovan Moore aka dantius)

We do not know if the firearm heat/recoil will or will not damage it or the object you will fasten to it

Airsoft3D M4 M16 Receiver Picatinny Mount Adapter Type I (20mm) for Airsoft / SoftAir Rifle - TeleScopix Shoulder Stock System Color:Gold It may not be suitableThis receiver adapter is part of Airsoft3D TeleScopix Shoulder Stock System. The TeleScopix shoulder stock system allows you to customize airguns, airsoft guns, foam dart ball blasters, and paintball markers for the perfect height, length, and aesthetics. Build a gun for maximum ergonomics, performance, and mobility. This receiver adapter provides a Picatinny mount at the back of the receiver to allow attachment of other devices, such as our shoulder