National Ordnance sold their M1 carbines with these barrels for a number of months. Reading through the history of National Ord, and the problems they had when they started designing their own parts, does not fill me with confidence.Īrnold made the decision to change his source for barrels and made the mistake of purchasing barrel blanks made from stress proof steel, followed by the mistake of not extensively testing the barrels after they had been machined. They don't have a solid timeline, but it sounds like you can figure it out partially by the features.Įdit: Actually, I'd seriously reconsider shooting this gun. If I were you, I'd read through the history of National Ord on the website below and see if you can figure out roughly when your carbine was made. Due to improper barrel metal, the barrels can blow up in use.Įdit: Turns out theres more then one potential safety issue due to manufacturing defects. Unfortunately, there is a serious safety issue with some National Ord carbines. National Ordanance was an aftermarket cabine manufacturer.

National ordnance inc m1 carbine