sight extension

sight extension

[′sīt ik‚sten·shən]
(ordnance)
Any device which raises the normal base or mount of a gunsight to provide improved or unobstructed sighting.
References in periodicals archive ?
22 LR upper, Titan Ordnance lower, adjustable Eliseo stock, Geissele trigger, Accuracy Speaks free-float tube, Medesha Firearms sight extension tube, and on down the list of target parts standard on most any match rifle build.
Using long strands of fiber that are housed by a protective tube, which runs through the sight extension, Axion's sights' design addresses one of a number of complaints with archery sights-pin support.
His invention consisted of a one-piece sight extension that was locked into place by forcing it down and into the lower corner of the slide bracket.
Requirements include long sight extensions, small peeps, tiny pins, possibly a scope and ideally a long stabilizer--some guys even weight their bows to make them more stable.