shotgun ?????'s

[huntingfool4life]

http://www.cabelas.com/cabelas/en/templates/product/standard-item.jhtml?id=0005620210795a&navAction=push&navCount=1&indexId=&podId=0005620&catalogCode=XD&parentId=&parentType=&rid=&_DARGS=%2Fcabelas%2Fen%2Fcommon%2Fcatalog%2Fitem-link.jhtml_A&_DAV=search&hasJS=true

i got a ? about this .... i bought this yesterday to put on my slug barrel but it wont fit cuz my sights get in the way does anyone kno how to get these on an 870 remington express??????
any answeres would be appreciated.

 

[huntingfool4life]

anyone have one of these on your gun or kno how they fit onto a gun ????? i need to kno if i need to take it back or if it will work. thanks huntinfool4life