I have two. One is a Charter, the other is a Survival Arms. I bought both quite inexpensively, I think the Charter cost me $20 and the Survival $15. The Charter shows somewhat more use (and abuse) than the Survival (for a time, I carried the Charter around in my car), but shoots a somewhat tighter group. The Charter has a glossy black plastic stock, while the Survival is dull black. I have never attempted to see if their barrels are interchangeable. I have never fired either at anything other than paper targets at 25 yards, but have never experienced malfunctions.