Textron is a company working on rifles using case-telescoped ammunition made from plastic. It is said to be about 40% lighter than the standard comparable brass ammunition.
The ammunition of choice is 6.5mm for the projectm which is more of intermediate caliber.
http://kitup.military.com/2016/09/textron-shows-off-new-6-5mm-case-telescoped-carbine.html
From: Kitup
