The Glock Slide Stop Lever & Spring – 43 (OEM Part #33731 / SP33731, SKU 100700168) is a genuine Glock factory assembly designed specifically for the slim, single-stack Glock 43 9mm. This drop-in replacement restores positive slide lock-back, smooth slide releases, and factory-original reliability—making it a must-have part for maintenance, repairs, or upgrades on your G43.
If your slide isn’t locking back consistently on empty or your current lever feels worn, this Glock 43 slide stop lever and spring is the correct OEM solution.
Genuine Glock OEM Slide Stop Lever & Spring for G43
This is a factory Glock part, not an aftermarket substitute:
OEM MFR #: 33731 / SP33731 – the official Glock part number for the G43 slide stop lever w/ spring.
Designed and manufactured to Glock’s strict tolerances for the G43 platform.
Ensures proper fit and function with your Glock 43 9mm slimline frame and slide.
Using genuine OEM parts is the easiest way to maintain the legendary reliability your Glock was built with.
Built Specifically for the Slimline Glock 43 9mm
The 33731 slide stop lever & spring is engineered for the compact, single-stack Glock 43:
Fits all Glock 43 9mm models according to major retailers and OEM listings.
Many vendors also note compatibility with Glock 42 using the same SP33731 assembly, underscoring its design for slimline frames (verify for your setup).
It is not intended for double-stack pistols like the G19/G17 or the wider .45/10mm frames—this is a G43-specific slide stop assembly.
Restore Positive Slide Lock & Fast, Confident Reloads
The slide stop lever and its spring are critical to how your Glock 43 runs:
Controls automatic slide lock-back after the last round when the mag is empty.
Allows you to manually lock the slide open for inspection, unloading, or maintenance.
Lets you drop the slide (depending on your technique) during reloads for a quick return to battery.
A worn or weakened lever/spring can cause:
Inconsistent or failed lock-back on empty magazines.
A “mushy” feel when trying to manually lock the slide.
Occasional failure to hold the slide open during range sessions.
Replacing with the OEM G43 Slide Stop Lever & Spring 33731 restores a crisp, positive feel and consistent lock-back behavior.
Durable Steel Construction – Glock Tough
The slide stop lever itself is made from hardened steel with a protective finish:
Steel construction provides long-term durability against recoil forces and repeated use.
Typically finished in matte or blued black, matching Glock’s slimline aesthetic.
The included spring is tuned for reliable upward tension, ensuring the lever reliably engages the slide notch when the magazine follower pushes it up.
Glock OEM parts are known for precise manufacturing and long-term reliability—exactly what you want in a critical control component.
Ideal for Routine Maintenance & Repair
Because it’s affordable and essential, the 33731 slide stop lever & spring is perfect for:
Refreshing high-round-count Glock 43 pistols used for EDC, training, or duty.
Replacing worn, bent, or damaged slide stop levers on older or heavily-used guns.
Keeping on hand in an armorer’s kit or spare parts box for quick repairs.
Preventive replacement of small parts like this is cheap insurance for anyone who carries a G43 for personal protection.
Simple Drop-In Installation
Installation of the Glock 43 slide stop lever & spring is straightforward for those familiar with Glock internals:
Ensure the firearm is unloaded and safe.
Field strip and remove the frame pins per Glock armorer procedure.
Lift out the old slide stop lever and spring.
Drop in the new 33731 lever and spring assembly, ensuring proper spring engagement.
Reassemble, then function-check slide lock and release with empty magazines before live fire.
Because this is a vital control part, many manufacturers recommend that installation be performed or inspected by a qualified gunsmith or certified Glock armorer, especially if you’re new to Glock frame work.
Key Features – Slide Stop Lever & Spring 43 (33731)
From Glock OEM and major parts retailers:
Brand: Glock (Factory OEM part)
Product: Slide Stop Lever & Spring – 43
Manufacturer Part Number (MPN): 33731 / SP33731
Retail SKUs: Brownells #100700168 and others
Compatibility: Glock 43 9mm slimline (fits all G43 models; some sources also list G42 – verify before use)
Material: Steel lever with factory-spec spring
Color/Finish: Black, matte/blued
Function:
Use Case: Replacement, repair, routine maintenance, and spare part for G43 pistols
Who Should Choose the Glock 43 Slide Stop Lever & Spring 33731?
Select this SLIDE STOP LEVER & SPRING – 43 (33731) if you:
Carry a Glock 43 for self-defense and want to maintain factory reliability.
Are experiencing inconsistent slide lock-back or a weak-feeling slide stop.
Are rebuilding or refreshing a used or high-mileage G43.
Maintain multiple Glock 43 pistols and need OEM components on hand for fast repairs.
For a small part, the slide stop lever plays a big role in how your pistol handles and communicates an empty mag. Trust your G43 to genuine Glock reliability with the Slide Stop Lever & Spring – 43, Part 33731 and keep your slimline 9mm running like new.
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