Leather that is not buffed is called âfull grainâ because the natural grain retains its markings and characteristics. BYCAST â A split leather with a polyurethane protective coating. Like splits, bycast leather is inferior as it lacks the natural characteristics, elasticity and durability of top grain leather.
Marine Corps Gunnery Sergeant. Gunnery Sergeant Marine Corps Military Ranks. A Gunnery Sergeant in the United States Marine Corps is a specialized non-commissioned officer who manages firepower and logistics for a company-sized unit of Marines. The rank of Gunnery Sergeant is unique to the Marine Corps, and was introduced in the 19th century.
Master Gunnery Sergeant/Sergeant Major (E-9) - 10 years TIS and 3 years TIG; The Difference in the USMC E-8 (Master Sergeant and First Sergeant) Master Sergeants and First Sergeants in the Marine Corps are paid the same (both are E-8s). However, the First Sergeant has a much larger degree of authority and responsibility. The First Sergeant wears special rank (with a diamond), and is the top enlisted leader in the unit. First sergeants work directly for the unit commander and are responsible for the morale, welfare, and discipline of all of the enlisted members assigned to the unit.