The little spring plunger on the end of the sear must be sticking due to congealed lubricants and dirt that is decades old. Soak the front end of the sear in penetrating oil and make sure the plunger (actually the disconnector) has freedom of movement before you reassemble the upper. That should fix your problem. Let us know how it goes.
__________________
regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
|