I have it too on all my guns. If you have to track a Buffalo or Lion or any dangerous animal into some high grasses for example, you can't use a scope there and you need to remove it as fast as you can, to put it again when you are out the grasess.
When you need to use it, you REALLY need it.
I think this made a gun more versatile.
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down by the river on a friday night
pyramid of cans in the pale moonlight
talkin' 'bout guns and dreamin 'bout women
never had a plan just a livin' for the minute