Identification of part

[RCS]

I found this part among some M16 and AR15 parts a few years ago - but have been unable to identify which model or even if it is a M16/AR15 part.

I found out - it is related to one of the Colt models - anyone care to guess what this part is for ? and to what Colt model ?Attachment 58026

Information

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[Al Diehl]

It looks like part of an M203 grenade launcher assembly for an M16. (see attachment)

Al

[RCS]

Correct answer Al, and thanks for posting that schematic drawing of the Colt 203 launcher parts. I found out what this part was for by the number on the other side but really wanted to see a schematic view of the parts. RobertAttachment 58028

[Al Diehl]

I knew that I had seen it before. Many, many times. The numbers do help sometimes.

Al