The original rear sight that comes with any of these airgun models will no longer fit on the steel breech. If you want a rear sight, the Crosman LPA MIM rear sight is made for this upgrade

*This breech does not fit older model 1377 air pistols with a sliding breech cover.

• 1-Year Limited Warranty
• Fits Crosman airgun models 1377,* 1740, 1760 and PC77
• Will accept the Crosman LPA MIM rear sight