M1 carbine barrel manfacturers after World War 2.?

Answer 1

Here is a list of companies that dealt with parts for M1 carbines after WWII. (Source: Wikipedia)

• Alpine of Azusa, Calif.[73]
• AMAC or Jacksonville, Ark. (acquired Iver Johnson Arms)[74]
• AMPCO of Miami, Fla.[75]
• Bullseye Gun Works of Miami, Fla.[76]
• Crosman Air Rifle; produced an M1 Carbine look-a-like [77]
• ERMA's Firearms Manufacturing of Steelville, Mo.[78]
• Erma Werke of Dachau, Bavaria serviced carbines used by the West German police post World War II. Manufactured replacement parts for the same carbines. Manufactured .22 replica carbines for use as training rifles for police in West Germany and Austria. Also for commercial export worldwide.[79][80]
• Federal Ordnance of South El Monte, Calif.[81]
• Global Arms [82]
• H&S of Plainfield, NJ (predecessor of Plainfield Machine)[83]
• Howa of Nagoya, Japan, made carbines and parts for the post-World War II Japanese and Thai militaries, and limited numbers of a hunting rifle version [84]
• Israel Arms International (IAI) of Houston, Texas assembled carbines from parts from other sources [85]
• The Iver Johnson Arms of Plainfield, NJ and later Jacksonville, Ark., (acquired M1 Carbine operations of Plainfield Machine) and followed the lead of Universal in producing a pistol version called the "Enforcer".[86]
• Johnston-Tucker of St. Louis, Mo.[87]
• Millvile Ordnance (MOCO) of Union, N.J. (predecessor of H&S) [88]
• National Ordnance of Azusa, Calif. and later South El Monte, Calif.[89]
• NATO of Atlanta, GA[90]
• Plainfield Machine Company of Plainfield, N.J. and later Middlesex, N.J. (P.O. Box in Dunellen, N.J.), M1 Carbine manufacture later purchased and operated by Iver Johnson [91]
• Rock Island Armory of Geneseo, Ill.[92]
• Rowen, Becker Company of Waterville, Ohio [93]
• Springfield Armory of Geneseo, Ill.[94]
• Texas Armament Co. of Brownwood, Tex.[95]
• Tiroler Sportwaffenfabrik und Apparatenbau GmbH of Kugstein, Austria manufactured an air rifle that looked and operated like the M1 Carbine for use in training by Austria and West Germany.[96]
• Universal Firearms of Hialeah, Fla. - Early Universal guns were, like other manufacturers, assembled from USGI parts. However, beginning in 1968, the company began producing the "New Carbine", which externally resembled the M1 but was in fact a completely new firearm internally, using a different receiver, bolt carrier, bolt, recoil spring assembly, etc. with almost no interchangeability with GI-issue carbines.[97]

Acquired by Iver Johnson in 1983 and moved to Jacksonville, Ark. in 1985.

• Williams Gun Sight of Davison, Mich. produced a series of 50 sporterized M1 Carbines