Hi again James B,

Double check the customer service number (toll free). But I believe the same model rear peep from Williams that fits the 7600 is the one that fits the 7400. (But call to insure......do NOT take my word on this....I haven't been able to verify.)

Here is a site that carries a reasonable selection:

http://www.shootnhunt.com/gun_sights.htm

Not sure if that helps....let me know!

Dave