This nickel-plated locking block is a direct drop-in for Glock 19, 23, 32, and 38 Gen 3 frames using the 3-pin locking-block layout (2013 and later production). Machined from 17-4 stainless and finished in nickel for corrosion resistance, it restores worn lockup or upgrades a build with a cleaner-looking internal. Specs: 17-4 stainless steel construction 44C Rockwell hardness (+/- 2) for durability Nickel-plated finish for corrosion resistance Fits 3-pin Glock frames (2013 and newer) Confirmed fit: Glock 19, 23, 32, 38 - Gen 3 Install: Drift out the locking-block pin, swap the block, and re-seat. Verify your frame is a 3-pin variant before ordering - early Gen 3 frames used a 2-pin block and require a different part. Inspect the trigger-housing pin while the frame is open and replace if it shows wear. DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.