Model 550-1A

[norm]

What is the difference between a model 550-1 and a model 550-1A?

Sorry, intented to post in the rifle forum.

[rsv1rem]

There is no difference. In fact there is no model 550-1A, the "A" is just marked on the shipping container to indicate that it's the base model, more administrative than anything else I think. The model 550 progressively became the 550, 550-P, 550-1, 550-1P, and the 550-2G (.22 short gallery version.)