How to use in-sentence of “blowback”:
+ Several blowback systems exist within this broad principle of operation, each distinguished by the methods used to control bolt movement.
+ In most actions that use blowback operation, the breech is not locked mechanically at the time of firing: the inertia of the bolt and recoil spring, relative to the weight of the bullet, delays opening of the breech until the bullet has left the barrel.
+ Roller delayed blowback is where the bolt has two rollers that pop out both sides of the bolt to lock the chamber.
+ However, there is Delayed Blowback where the chamber is locked until the pressures drop to a safe level to reload.
+ The pistol is a blowback semi-automatic.
+ The blowback principle may be considered a simplified form of gas operation, since the cartridge case behaves like a piston driven by the powder gases.
+ The likes of rifle rounds which have higher pressures is usually deemed unsuitable for simple blowback operation.
