Quote Originally Posted by RCS View Post
a person on Joustericon stated this gas trap was missing the lock bar rear sight, another on the CMPicon forum stated that the follower was wrong and also the lock bar rear sight was missing too !
The locking bar rear sight wasn't used until somewhere near the 500,000 serial number range. Up until that time the flush nut rear sight was used as is pictured on the rifle. The follower was changed from the early type to the later type around serial number 44,000 serial number range. Those two items are correct as shown.