GU Old-Style Multipoint Locks & Parts

Replacement Parts for Legacy GU Ferco Multipoint Lock Systems

The original GU Ferco multipoint locks were widely installed on Superior Doors and other premium entry door systems throughout the 1990s and early 2000s. These old-style locks feature a different lock body design than current GU production, with the spring latch and deadbolt positioned in slightly different locations. At MPLocks, we maintain inventory of these legacy components because we understand that many homeowners and repair professionals need exact replacements rather than complete system overhauls. The distinctive gold and yellow dichromate faceplate finish makes these locks easy to identify when sourcing the correct parts.

Understanding Old-Style vs. New-Style GU Lock Compatibility

One critical detail when ordering GU replacement parts is that the gear boxes on old-style and new-style locks are not interchangeable. The lock case dimensions, latch positioning, and internal mechanisms differ between generations. Before ordering, verify that your existing lock matches the old-style configuration—look for the yellow dichromate finish on the faceplate and measure your backset carefully. Most old-style units feature a 50mm backset and 92mm PZ spacing, though variations exist depending on the original door manufacturer's specifications.

Shootbolt Components and Extension Parts

This collection includes essential shootbolt components such as reversing gears, extension tips, and reinforcing strips. The top shootbolt reversing gear allows proper coordination between your handle operation and the shootbolt engagement at the top of the door frame. Upper shootbolt extension tips work with the reversing gear mechanism, extending when the bottom receptacle with serrated teeth is pulled down. These parts are essential for maintaining the full 3-point locking security that GU multipoint systems provide.

• GU Ferco Multipoint Lock Hardware
• GU Ferco Lock Cases and Repair Parts
• GU Ferco Strike Plates for Shootbolt and Roller Locks

Identifying the Correct Backset and Faceplate Width

When replacing old-style GU lock components, accurate measurements are essential. The backset—the distance from the edge of the door to the center of the lock cylinder—is typically 50mm (2 inches) on these systems. The faceplate width is commonly 20mm (3/4 inch), though some backset configurations have been discontinued by GU Ferco. Measure your existing faceplate width and backset before ordering to confirm compatibility, as mixing old-style and new-style components will result in improper fit and function.

Finding the right replacement part for a discontinued lock system can be challenging. If you need help identifying your specific GU old-style lock or confirming which components you need, call our team at (816) 221-6543 for personalized assistance. You can also use our free Multipoint Lock Identifier to submit details about your existing hardware, and our experts will review your information to recommend the correct replacement parts.