Lantac USA | Ultimate 4lb Trigger Spring Kit | Glock 17/19 Gen1-4

The Lantac Ultimate Spring Set 4LB (S-Kit) is a calibrated replacement spring kit for Glock 17 and 19 models Gen1–4. Springs are manufactured from tempered, high-grade piano wire and are intended to provide consistent force through the compression cycle. The kit includes a 4.0 lb firing pin spring plus tuned trigger and firing-pin-safety springs to reduce friction and alter trigger pull characteristics. Typical applications include competition shooting and precision target practice.

Product Specifications

• The brand is Lantac USA.
• The model/name is the Ultimate Spring Set 4LB (S-Kit).
• The kit is compatible with Glock 17/19 Gen1-4.
• The kit includes a 4.0 lb firing pin spring intended for target, competition, and sporting use.
• The springs are manufactured from highest grade piano wire, tempered for service life.
• The calibrated trigger spring is specified to reduce pull weight by as much as 1 lb.
• The lower-power firing pin safety spring is designed to create reduced friction for smoother operation.
• Package dimensions are 1.20 X 3.05 X 6.95.
• The package height is 1.2000 (units as provided by source).
• The package width is 3.0500 (units as provided by source).
• The package length is 6.9500 (units as provided by source).
• Manufacturing origin is listed as Manufactured in the USA.
• Shipping restriction: NO DIRECT SHIP TO CALIFORNIA.
• The UPC is 712038709779.

This spring set is a straightforward, parts-level upgrade for Glock 17 and 19 pistols (Gen1–4) for users who prefer tuned trigger characteristics and smoother firing-pin engagement. The kit’s tempered piano-wire springs and calibrated forces make it suited to competitive stages and precision range sessions where consistent trigger feel matters.