Handguard liner

[GUNHEEP]

Can anybody post a picture of a gas trap handguard steel liner?
Thank you

[RCS]

bottom is the type used on gas trap hand guards, top is the gas port liner. The gas port liner was used on some very late gas trap rifles so I have been informed. Fakes have been around since the late 1980's, some are too thick while other are about impossible to tell if fake. Early liners have drawing numbers

[GUNHEEP]

Thank you. I thought the early liners with the drawing number have the holes?

[GUNHEEP]

Does anybody have a picture of a liner with the drawing number! Thank you