A sight extension for Air Rifles with an integrated foresight tunnel.
ISSF Rules allow for the total length of an Air Rifle 'system' - i.e. from the rear of the action to the front of the barrel or barrel extension - to be no more than 850mm. Many Air Rifles come setup shorter than this, and some makes/models don't provide the capability to change the length.
We recommend all serious Air Rifle shooters to extend the sight base to just under the 850mm limit (close, but not too close!) and this tube provide the capability to do just that!