This Light Sight will fit on most blasters but not all. This light mount will accommodate aStreamlight 66318 MicroStream Ultra-compact Aluminum body Flashlight. https://www.amazon.com/Streamlight-66318-MicroStream-Ultra-compact-Flashlight/dp/B00143JZ08/ref=sr_1_1?ie=UTF8&qid=1526643581&sr=8-1&keywords=streamlight+microstream

If your looking for a cheaper light... https://www.amazon.com/gp/product/B01HCH1MR8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

You may need to ad a small piece of electrical tape around the head of the flashlight to achieve a tight fit.