Does the M240 have an adjustable gas setting?

Does the M240 have an adjustable gas setting?

• A. False
• B. Not adjustable
• C. Only on certain models
• D. True

Answer: (D)

Gas pressure from the barrel drives the M240’s cycling, and the weapon includes an adjustable gas regulator to fine-tune how much of that gas is used to operate the action. This lets the shooter tailor reliability to different conditions: varying ammunition types, the presence of a suppressor, barrel fouling, or temperature. Set it to a level that keeps the bolt cycling reliably without over-stressing parts; too little gas can leave the bolt short-stroking, while too much gas can cause over-gassing and wear. Because of this adjustable regulator, the M240 does have a configurable gas setting, not a fixed one.

Gas pressure from the barrel drives the M240’s cycling, and the weapon includes an adjustable gas regulator to fine-tune how much of that gas is used to operate the action. This lets the shooter tailor reliability to different conditions: varying ammunition types, the presence of a suppressor, barrel fouling, or temperature. Set it to a level that keeps the bolt cycling reliably without over-stressing parts; too little gas can leave the bolt short-stroking, while too much gas can cause over-gassing and wear. Because of this adjustable regulator, the M240 does have a configurable gas setting, not a fixed one.