The mini fix by q, if its not obvious already, is the mini action version of the fix.Advantages and features mimic its short action big brother, but with a few changes.The mini fix has a smaller receiver and bolt assembly and accepts the m4 magazine.Metal Finish: BlackAction: Semi-AutoCaliber: 300 BlackoutBarrel Length: 8"Capacity: 10+1Safety: Safety Selector SwitchGrips: Black PolymerSights: None, Optic ReadyWeight: 4.70 lbsStock Material: SyntheticOal: 26.75"-27.95"Stock Finish: BlackBarrel Length Range: 8" to 8.99"Weight Range: 4 lbs to 4.99 lbs