Freedom Arms Mini Revolver. Parts List. Sort by: 0 Schematic w/ Parts List Freedom Arms Mini Revolver Schematic w/ Parts List ... .22 Mag, 4 Shot, Used Factory Original. Sep 27, 2017 · The PSA Freedom line from Palmetto State Armory (PSA) is marketed as an economy AR-15. One difference between the Freedom line and other PSA products is that the barrels of the Freedom rifles and uppers are not chrome-lined. Since chrome lining a bore is expensive, the cost savings is passed down to the consumer.