Mike from Thomas Air recommended this to me, it's a minimalist but adjustable butt plate for your field target or general rifle. You can find more info online, MEC lists it as MEC 140 Lightweight Aluminum Alloy Adjustable Butt Plate Assembly. It is new, unused, and comes in a tube with instructions (supposed to fit most modern target rifles). It looks very well made and I'm tempted to keep it for some future project, very nice. These sell for $154 plus shipping at Champion's Choice and other 10m orientated shops. $140 shipped