The RM277 is a bullpup rifle initially developed by General Dynamics and then by LoneStar Future Weapons. It was an unsuccessful contender for the US Army's NGSW (Next Generation Squad Weapon) program, and was developed for the NGSW-R (rifle) and NGSW-AR (automatic rifle) roles.
The weapon is chambered in 6.8mm TVCM, a polymer-cased cartridge developed by True Velocity.
