AirSplat ON DEMAND: KWA M4 SIR Tactical Airsoft AEG Rifle Ep

http://www.airsplat.com/Items/ER-KWA-M4S-SIR.htm
Jake and Kristen do an in-depth review of the extremely customizable M4 SIR. This thing not only offers superior performance, but also allows you to attach anything you might need to get the job done.