Smith & Wesson J Frame Pre-Model Main Spring & Stirrup Used 16 Cylinder and barrel parts are

Cylinder and barrel parts are caliber-specific and will not interchange with other J Frame

Important: This is the old style crowned screw for revolvers manufactured before 1988

Complete with all necessary screws for proper installation

preventing double-feeds and ensuring reliable feeding

Improper installation can result in serious injury or death

Smith & Wesson J Frame Pre-Model Main Spring & Stirrup Used 16 Cylinder and barrel parts areSmith & Wesson J Frame Pre Model Main Spring & Stirrup Used (Part# J36141A) This listing is for one used Smith & Wesson J Frame Pre Model main spring and stirrup assembly. This is an OEM factory part in used condition. The main spring (also called the hammer spring) powers the hammer, while the stirrup links the main spring to the hammer. This assembly fits all J Frame Pre Model revolvers produced before the model numbering system began in 195758.