Stencollector's point about the carbine being muzzle heavy is well taken. I suppose that an option would be to use aluminum rather than steel tubing to reduce the weight a bit. Even the barrel nut and muzzle cap could be turned from aluminum. If the gun were to be given a Suncorite type coating for finish, it would not be apparent that steel was not used.

J. Savoie - I've never seen that video, but I would bet that it describes construction of a smg, not a legal semi auto.
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