The attachment bears the Nine Ball brand. It works with Tokyo Marui's GBB USP replicas, and is designed to eliminate jams when using a gun with an attached silencer. This problem can occur when the silencer is directly attached to the barrel, because it can slightly affect its alignment due to its weight.

Thanks to the fact that the product by Nine Ball transfers the weight from the barrel to the frame of the replica, the user can be sure that the replica will function properly, even with heavier silencers. The only requirement is to have a device with a counterclockwise 14 mm thread. In addition, the attachment has a mounting rail made in the Picatinny standard. After mounting the attachment, the rail will be in the front of the frame. This will allow its users to add accessories such as a flashlight or a laser.