My first photo shows a Springfield WW1 period hanguard which also has the fixture slot inside (most of them had this slot, never on a Remington handguard)

My second and third photos show Remington handguards as identified by John Beardicon on jouster2 last week. The "hump" is different from the early SpringfieldAttachment 98326Attachment 98327Attachment 98328
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.