Sun Optics USA Bubble or Spirt Levels are one of the best training aids available to assure your gun is not canted when shouldered. A must for those wanting the most out of their offhand groups. These levels also assure bench rest shooters their gun is square to the target. Aids tremendously when squaring or leveling your scopes reticle. Simply clamps on to your 11mm dovetail usually in front of the rear ring. Can be left on during transport. Will fit in most any bag or case without removing it from the gun.
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