US Army has published a solicitation for research of novel combustible cartridge cases for next generation small arms ammunition.
DTIC ADA131895: Variations in Manufacturing Processes 155 mm Combustible Cartridge Case : Defense Technical Information Center : Free Download, Borrow, and Streaming : Internet Archive
US Army Archives - Page 5 of 7 -The Firearm Blog
군사탭) 미 육군, 소진탄피 소총탄 입찰경쟁 공고 - 미스터리/공포 - 에펨코리아
EXCELLENT, ORIGINAL THUER'S PATENT .44 CAL. BRASS CARTRIDGE — Horse Soldier
30mm M788 TP Projectile with NATO Standard Brass Cartridge Case
February 2018 - Page 4 of 10 - The Firearm BlogThe Firearm Blog
US Army Archives - Page 5 of 7 -The Firearm Blog
US Army Survival Manual FM 3-05-70 by Logo Products / HoldenUSA - Issuu
2018 - Page 74 of 96 - The Firearm BlogThe Firearm Blog