Found these in the butt trap on a long channel GHD stock

These look like cement or mortar to Me.They have been there a LONG time,and this stock was filthy,and under buttplate was caked in sand,mud and who know's what else.Just thought I'd share this neat find and BTW,the stock came from Dupage trading.

https://www.milsurps.com/images/impo...tents001-1.jpg
https://www.milsurps.com/images/impo...tents003-1.jpg
https://www.milsurps.com/images/impo...tents004-1.jpg
https://www.milsurps.com/images/impo...tents006-1.jpg

Used to counter-balance the recoil?

here is a better pic.
https://www.milsurps.com/images/impo...tones006-1.jpg

I added a drop of muratic(sp)acid it started foaming.

possibly souvenirs from theatre?

Sergeant Mike Horvath collected tin cans full of sand from each theater. :confused: