600AST= 12 gauge slug barrel iron sights.The 600 series comprises widely varying models of hammerless, pump action repeaters, all of which share the same basic receiver and action, but differ in bore size, barrel length, choke options, magazine capacity, and 'furniture' (stock and forearm) materials. Mossberg & Sons, with the addition of an anti-rattle system in the magazine tube. The New Haven 600 is identical to the Mossberg 500 from O.F. Mossberg & Sons' private, promotional brands. Mossberg & Sons on behalf of department stores, most notably the Montgomery Ward Company, Western Auto, and other retail stores. New Haven 600 is a series of pump-action shotguns manufactured by O.F. In therory it was plainer than those sold at gun stores and higher retailer. The 500 is the model number the 'A' means 12 gauge, the 'B' means its was sold at a discount house like Walmart or K Mart.

Mossberg Model 500 was introduced 1961 and is still in production. Same issue in canada with the mossberg shotguns made at the canadian Lakefield plant, no. Favorite Answer Mossberg did not put serial numbers on any gun until after the Gun Control Act of 1968. Therefore it's pre-68, but if anyone knows a way to find production year out id love to know level 1. It's got a single action bar and some engraving in the receiver when it's closed, and no serial number. Is there anyway to look up the serial number and find what year my Mossberg 500A serial number is L170429. The serial number on the Mossberg 500 is on the left side of the receiver.

Post subject: Mossberg 500-B Serial Number Location. I own many pre '68 Mossberg's with no serial numbers. Serial numbers weren't required until 1968. The Mossberg 500 went into production in 1962.

Mossberg 500 Serial Number History