Power Sources Covered in this review: CO2 - Green Gas / Propane - Spring - AEG / AEP (Automatic Electric Gun - Airsoft Electric Pistol)
Pro’s:
CO2 Airsoft Guns allow for fast repeat shooting, great for action shooters, generally CO2 Airsoft Guns will have a little more power then Green Gas Airsoft Guns. There is no need to pump or cock your CO2 powered Airsoft gun in-between shots and a CO2 power source can allow for a very realistic action of the gun you are shooting.
Green Gas (Propane) Airsoft Guns operate much the same as CO2 Airsoft guns so they all make for great action shooters and the Green Gas powers the mechanical operation allowing for very realistic operation. Green Gas (Propane) Airsoft Guns can cost a little bit less to operate that a CO2 Airsoft Gun especially if you plan to use Propane as it can be cheaper to buy than the smaller 12 gram CO2 Cartridges.
Spring Airsoft Guns are generally fairly basic and low cost so they are the usually the most affordable Airsoft guns to buy. There is no need to buy CO2 or Green Gas or even a Battery and Charger Setup so the cost to shoot Spring Airsoft Guns is only going to be subject to the Airsoft BB’s you plan on buying.
AEG (Automatic Electric Guns) have the most consistent power as they use a spring internally that the electric motor draws back before each shot, the internal spring will essentially apply the same force to the Airsoft BB’s with each shot. AEG (Automatic Electric Guns) are a great option when you are wanting a Full Auto Airsoft gun since there is no cool down effect and as long as your batteries are charged and you have Airsoft BB’s in your magazine, the gun will simply keep shooting. AEG (Automatic Electric Guns) allow for the highest capacity magazines and often hold as many as 500 Airsoft BB’s in a single magazine. So if you’re looking for raw firepower an AEG or AEP Airsoft Gun is your best option. Once you have purchased your AEG (Automatic Electric Gun) and a battery and charger setup, they are fairly inexpensive to operate since no CO2 or Green Gas is required.
Con’s:
CO2 Airsoft Guns require the additional cost to buy the CO2 cartridges as they will not function without it. CO2 Airsoft Guns have a limited power output and lose power as you shoot and use up the CO2. CO2 Airsoft Guns are effected by hot and cold temperatures and will have less power in colder temperatures and may not even work in super cold environments. CO2 Airsoft Guns will have a more conservative ammunition capacity since too high of a capacity magazine would freeze up the magazine and even the gun.
Again since Green Gas (Propane) Airsoft Guns work much like CO2 Airsoft Guns, they are effected by cool down and lose power when shoot quickly or as the Green Gas or Propane runs low. Green Gas does not expand as much as CO2 so it will not be as powerful and even less effective in colder temperatures. Green Gas Airsoft Guns will have a more conservative ammunition capacity since too high of a capacity magazine would freeze up.
Spring Airsoft Guns are not the best action shooters since you need to manually operate the slide to pullback the spring prior to each shot, this does work well with Pump, Lever and Bolt Action Airsoft guns but is not the best option for pistols since most real steel pistols operate in semi auto mode.
If you plan to use your AEG (Automatic Electric Gun) in a battle then it will require a multi battery setup which does cost a bit more upfront. AEG (Automatic Electric Guns) are know to not operate as realistically as a CO2 or Green Gas Airsoft gun since CO2 and Green Gas Guns do allow for the same realistic mechanical operation which can give very believable blowback operation, this is hard to replica with an AEG Airsoft Gun.