All Hunter Arms ejector guns had one type of roller release through the years, non ejector guns just used the "J" spring that caught on the barrel loop to hold the for-end on. There was a lot of complaints of for-ends being lost because the "J" spring was loose and were lost in the field. Hunter Arms came up with this Curtis for-end release around 1913? to prevent this and it worked but was a lot of money to make if you look at the parts drawing you can see why. After 1919? it was stopped and all non ejector guns except the Field Grade were given the banjo style roller release and later the rectangular one. Some say it was a patent infringement but I believe it was a cost factor.
