J Mascis Jazzmaster2023

This guitar's known factory issue is its Tune-O-Matic-style bridge sitting at a 12 inch radius against a 9.5 inch fretboard, and owner communities specifically discuss this roller bridge as one of the few still-available options for the same general bridge family. It does not fix the radius mismatch itself, and exact post spacing has not been independently confirmed against this specific guitar. Other commonly cited fixes (Wilkinson rollers, which only come in 14 inch radius, and a StayTrem replacement that multiple recent owner threads report as discontinued for this guitar) are not real current options and are deliberately not listed here.

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Jazzmaster pickups use a distinct shape and route regardless of the internal construction. Even though this guitar's stock pickups are reportedly P90-style construction under the cover, the cover shape and mounting are standard Jazzmaster, so a standard-shaped Jazzmaster pickup set should still fit the route.

Purpose-built Jazzmaster-shaped P90, fits the same body shape and pickup route as the standard Jazzmaster. Multiple owner installs specifically confirm a direct fit in the stock route on this exact model.

Purpose-built to fit the standard Jazzmaster route and cover, the same route family this guitar shares with the standard Jazzmaster.

Gotoh's vintage-hole locking line is built for the same ~8.5mm bore as the guitar's other vintage-style locking tuner option.

This guitar is marketed with vintage-style tuners, consistent with the ~8.5mm hole size measured across the rest of the Squier Classic Vibe family. Not independently measured on this specific model, but a well established pattern across the line.