After spending about a half hour sifting through some old threads and even turning up very little with google and not really getting a concrete answer ( as item descriptions did not specify), I thought this would be worthy information to add here with some key words. This is for those looking to add a top rail for a scope or red dot to a pre 1997 mossberg 500 with no screws on top like the 97 models.
It does not say pre 1997 in the description so I thought I would add it does fit perfectly and takes 3 minutes to install on a pre 1997 mossberg 500.
Side Saddle top rail scope / reddot mount mossberg 500 pre 97 model
$30.06
Manufacturer: Aimtech ASM3
Item: 19118
Specifications and features:
Fits Mossberg 500, 5990 & Maverick 88 12 gauge shotguns
Saddle-style mount
Slides down receiver & straddles both sides
No gunsmithing required
Quick target acquisition
Standard dovetail mounting rail
Accommodates Weaver/Picatinny rings & electronic sights
Mil-spec type II anodized
Installs quickly
Non-glare satin black
http://www.cheaperthandirt.com/19118-34.html
It does not say pre 1997 in the description so I thought I would add it does fit perfectly and takes 3 minutes to install on a pre 1997 mossberg 500.
Side Saddle top rail scope / reddot mount mossberg 500 pre 97 model
$30.06
Manufacturer: Aimtech ASM3
Item: 19118
Specifications and features:
Fits Mossberg 500, 5990 & Maverick 88 12 gauge shotguns
Saddle-style mount
Slides down receiver & straddles both sides
No gunsmithing required
Quick target acquisition
Standard dovetail mounting rail
Accommodates Weaver/Picatinny rings & electronic sights
Mil-spec type II anodized
Installs quickly
Non-glare satin black
http://www.cheaperthandirt.com/19118-34.html