Guess the part

[RCS]

This part fits a military rifle and often is used to prevent accidental firingAttachment 37893

Information

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[Bill Hollinger]

It is a select fire block for an M16.

[RCS]

Bill, It did not take very long for you to name the part. RobertAttachment 37902

[Bill Hollinger]

Robert, my old partner was in the National Guard and was sent to the Rodney King riots in LA and he came back with a handful of these. They all had the stop tabs broken off