Paul Kim, former Vice President of Engineering at SureFire, started his own company a few years ago producing some interesting lights and this time it's a weapon light with a spring loaded quick fasten rail mount system.
Specifications:
- 550 Lumens using 6200k CREE XML U2 chip
- 1 CR123A battery
- 45 minute steady output
- Weighs 3.4 oz empty
Price is around $150
You can see it in other photos from South Korea's Special Warfare Command Exhibition
http://www.thefirearmblog.com/blog/2016/12/15/k7-smg-pk-weapon-light/
http://bemil.chosun.com/nbrd/bbs/view.html?b_bbs_id=10044&pn=1&num=207231