CO2 powered air rifles
This type of air rifle uses CO2 (compressed gas) cartridges. All semi automatic air rifles use CO2 as their power source. One big advantage of using CO2 is that you don't have to stop and pump up your air gun before each shot. Just pop in a CO2 cartridge and your ready to go. Generally one 12 gram CO2 cartridge will give you about 50 shots before you have to change it out. However this number can vary from air gun to air gun depending on the efficiency of the air rifle. One of the most popular co2 powered air rifles is the Crosman 1077. In the last year or so Crosman has released its new line of Air source air rifles. These rifles use the new 88 gram CO2 cartridge which will give you up to 400 shots per cartridge before you have to change it out. A nice thing about the air source rifles is that you can also use the 12 gram CO2 cartridges in them as well. Another big advantage of using CO2 is that it allows for semi automatic fire (fire as fast as you can pull the trigger) if the air rifle is capable of it. CO2 air rifles are great for ease of use and semi automatic capabilities but there are a couple of drawbacks. CO2 powered air rifles are usually not as powerful as spring or pump powered rifles. The most powerful CO2 powered air rifle (the Wather Lever Action Long) shoots at 640 FPS and most other CO2 air rifles shoot at around 600 FPS. While this is decent power, pump and spring air rifles are capable of shooting at 700-1250 FPS. Another drawback is expense. While CO2 is relatively cheap these days the cost over time can add up.
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