This M4 Carbine Buttstock is compatible with Spyder MR1 MR2 MR3 MR4.
This M4 Carbine Stock is compatible all Spyder paintball markers. It is easy to install—installation does not require any tools, and takes less than a minute. It is simply plug-and-play, and you are ready for tactical paintball action! You can switch the stock in between game for different type of play.