Interchanging sears question

[CJP1]

Could someone tell me if the top bolt release sears are interchangeable between model numbers as well as flat and round receivers? If so, would you please list which models are compatible with the model 16? Thanks in advance for your help with this matter.

[sharpshooter]

Top release sears are all the same, and are interchangeable.

[CJP1]

Thanks. That's what I was thinking but wanted to ask.