HBAR (Heavy Barreled Automatic Rifle) Usually weighing upwards of 8.5lbs these are extremely popular semi-automatic rifles with longer barrels. Popular models include the ArmaLite AR-15 and the M16.

HFC134a One of two main gas propellants used in the Airsoft industry along with HFC22 to fire the very popular Airsoft Gas Blow-Back Gun. HFC134a (Tetrafluoroethane) is a high temperature refrigerant gas used primarily for domestic refrigerators as well as automobile air conditioners. HFC134a is also noted as a gas with no ozone depletion potential. This gas becomes liquefied under pressure and is used as a propellant to propel solvents or in the Airsoft industry, the pellets of gas Airsoft guns. When this gas is released it creates a vapor pressure of 96 psia. HFC134a is primarily used for the gas Airsoft guns that are manufactured in Japan, such as Tokyo Marui and Western Arms. The Japanese manufactured gas Airsoft guns are generally not designed for use with the more powerful HFC22 gas, which if used can be detrimental to the gun.

HFC22 A form of Tetramethane gas, HF22 in the Airsoft industry is most commonly referred to as “Green Gas”. Other names include Top Gas, Omega Gas, and ToyJack Gas. More powerful than HFC134a, this gas is designed primarily for Airsoft guns that have been manufactured in Taiwan. These companies would include KWC and KJW.

Hi-Cap (High-Capacity Magazine) Hi-Cap mags are generally designed for the large and powerful automatic electric guns such as the AK47. High mags usually contain between 200 to 600 BBs.