http://http://i304.photobucket.com/albums/nn175/surveyman_bucket/Mystery%20Rear%20Trunnion%2003.jpg" />href=http://i304.photobucket.com/albums/nn175/surveyman_bucket/Mystery%20Rear%20Trunnion%2004.jpg" />href=http://i304.photobucket.com/albums/nn175/surveyman_bucket/Mystery%20Rear%20Trunnion%2002.jpg" />Gentlemen-

About a year ago, I bought this rear trunnion to use on an East German MPIkM project.
I ended up not using it and now I've got this strange rear trunnion in my parts box and can't figure out what weapon it is for.
The attached pictures show the Mystery Trunnion alongside of a standard AKM pattern rear trunnion (from an Egytptian ARM) .

Comparing the Mystery Trunnion to the Egyptian one:
-It is 'H' shaped where the rivets go through.
-The Trunnion is narrower.
-The Stock Tang is longer.
-The Rivet Holes are closer together.
-The Trunnion is thickened where the bolt carrier smacks into it.

Here are the measurements I took with my digital calipers:
Overall length:
-Mystery:   3.149"  (80.00mm)
-Egyptian:   3.1465"  (79.90mm)
Overall width:
-Mystery:   1.227"  (31.14mm)
-Egyptian:   1.258"  (31.96mm)[/*]
Rivet Hole Spacing:
-Mystery:   0.8630"  (21.91mm)
-Egyptian:   0.9495"  (24.11mm)
Tang Length:
-Mystery:   1.449"  (36.83mm)
-Egyptian:   1.3165"  (34.57mm)

So what do you guys think?
Maybe it’s from an, SVD, Dragunov or RPK?

-Frank

With a width of 1.221 +,- and a longer stock tang your looking at a Chinese rear trunnion.
nhoj