You will have to call the company to find out.
No
All.
If you have a 500, and it is a 12 gauge, it is a 500A. The "A" designates it as a 12ga. A 500B is a 16ga, a C is a 20ga, and an E is a .410.
To determine the year of manufacture for your Mossberg 500A shotgun, you'll need to check the serial number located on the receiver. Mossberg uses a date code system where specific letters correspond to certain years. You can cross-reference the serial number with resources available online, such as Mossberg forums or manufacturer's documentation, to identify the production year. Additionally, contacting Mossberg customer service can provide you with precise information.
Yes.
It means you have a Mossberg Model 500a shotgun with the serial number L109563.
It can be, if you are using a slug
175-350 USD
Yes, it is. The 600AT was simply sold under the New Haven name instead of the Mossberg brand. It's a Mossberg 500A (12 gauge) intended for targets and hunting (long barrel and great wood). All Mossberg 500 parts fit it.
The best way to find the age of a Mossberg 500A Shotgun is simply to call the company's customer service line and have the serial number and model number handy. Mossberg has yet to publish a list of their serial numbers in relation to the dates of manufacture.
50-250 or so
The Mossberg and Sons Model 146B was manufactured in 1954-1958.