Oddball and rare sight meant to mount on a Newton or Mauser with a dovetail slot cut into the tail of the bolt. The flip down aperture is good and snug. Stem moves up and down. Light blue wear but all detents and adjustments are just like new. Pivot lock works correctly as well. Neat piece. Shipping can be as little as $13 in a reinforced letter envelope or the extra small flat rate box for whatever that cost is. Can also come pick it up at the Calgary show tomorrow or another location, time etc. thanks