The Bushmaster Carbon 15 .22 LR rifle system consists of a firearm, 10 round magazine, and instruction manual. It is a very light weight firearm – blow back operated, magazine fed, and operates in semi-automatic mode (i.e., a single shot fired each time the trigger is pulled). Retracting the charging handle cocks the internal hammer and compresses the recoil spring. When the charging handle is released, it moves the bolt forward (driven by the recoil spring), strips a cartridge from the magazine, and chambers the cartridge. The bolt is held against the chambered cartridge by the recoil spring.
When the trigger is pulled, the hammer is released and strikes the firing pin. The firing pin indents the cartridge case rim and ignites the priming compound inside the rim and a great volume of gas is instantly generated which acts on the cartridge case in all directions. The bullet moves out of the cartridge case, and exits the muzzle. The bolt then moves rearward automatically, extracting and ejecting the fired cartridge case, and at the same time cocking the hammer and compressing the recoil spring, as described above. Once the trigger is released the firearm is ready to fire again. The firearm will fire if there is a cartridge in the chamber whether or not there is a magazine place. The rifling is R.H. twist, 1 turn in 16” – 6 lands & grooves.
Note: If the rifle is not going to be fired immediately, make sure the selector lever is still on safe.
If your rifle stops firing perform the following immediate actions…
If your rifle stops firing with a live round in the chamber of a hot barrel, remove the round fast. However, if you cannot remove it within 10 seconds, remove the magazine and wait 15 minutes with rifle pointing in a safe direction with the safety on during that time. This will help prevent injury if a round fires as a result of a hot barrel. Keep your face away from the ejection port while clearing a hot chamber.
If an audible “POP” or reduced recoil is experience during firing, IMMEDIATELY CEASE FIRE:
Do not apply the “Immediate Actions” previously described.
If a bullet is stuck in the barrel of the weapon, do not try to remove it. Take the rifle to a qualified gunsmith.
Clean your rifle as soon as possible after firing, to make the job easier, and to avoid the development of any corrosion. When your firearm has not been fired, you should clean it at least once or twice a year if you live in a temperate climate, or as often
as once a week in a tropical climate. If you get your firearm wet, clean it as soon as possible. Use only high quality products which include a cleaning rod, swab holder, cotton flannel bore patches, pipe cleaners, a small toothbrush, brass wire bristle bore and chamber brushes, and CLP (Cleaner–Lubricant–Preservative). After disassembling the rifle/pistol, thoroughly clean, inspect and lubricate all parts according to the techniques described in this manual.