What are these plastic things???

[3S1K]

I was putting on the larger butt pad on my 522 and I noticed in the bag there was 2 plastic things with it. What are they for?

[imschur]

got a picture for us non 522 owners?

[Madhouse]

I have no idea what those things are.  I just looked them over, I had never even opened that bag until now.

[redman]

Based on what you are describing it sound like they are the 'Lock Blocks'.  You can change the out the stock to change what position it will lock in.  Check out this link...or Google "Sig522LR Folding Stock Info" http://www.sigpower.com/522/522.html

[Madhouse]

Yup!  These:

[redman]

Spot on, that's them!