Apex Optic Mount for Holosun 509T Optic to Glock MOS Pistols

Description

Living on the Florida coast means your gear fights a constant battle against salt, sand, and sweat. Your everyday carry pistol needs to be reliable, and that includes the optic mount holding your sight zero. The Apex Optic Mount for the Holosun 509T is built for this environment. Machined from a solid billet of steel and finished with a durable black oxide coating, this mount resists the corrosion that plagues lesser aluminum mounts in humid, coastal air. It’s made by Apex in Arizona, and it’s designed to lock your 509T securely onto your Glock MOS slide — no adapters, no shims, no guesswork.

This mount is purpose-built for one job: attaching the Holosun 509T directly to any Glock slide with the factory MOS cut. That includes popular models like the G19, G17, G34, G45, and G47 MOS. You won’t need a separate adapter plate, which means fewer screws to check and a lower profile that keeps your optic snag-free. The mount is precision-milled to match the MOS footprint exactly, so your optic sits solid and co-witnesses with your iron sights. For Florida shooters who carry every day, that direct fit means one less point of failure — and one less thing to worry about when you’re sweating through a summer afternoon.

Installation is straightforward. The mount includes all the required mounting screws, so you don’t need to hunt down specialty hardware. Just clean your slide’s MOS mounting surface thoroughly to remove any oil or debris, then torque the included screws to 15 in-lb. That spec is critical — too loose and your optic shifts, too tight and you risk stripping threads. A simple torque driver or wrench gets it done. Once installed, the 509T sits tight, and the steel construction absorbs recoil better than aluminum, helping maintain zero over thousands of rounds. For a $60 investment, you’re getting a mount that outlasts cheaper options and keeps your optic exactly where it needs to be.

Key benefits for your EDC setup:

• Corrosion-resistant black oxide finish — holds up against Florida humidity, salt spray from beach trips, and daily sweat exposure.
• Solid steel billet construction — much stronger than aluminum, with better vibration dampening and less flex under recoil.
• Direct fit for Glock MOS slides — no adapter plates needed. Works with G19, G17, G34, G45, G47 MOS, and other MOS models.
• Includes all mounting screws — no extra purchases required. Torque spec is 15 in-lb for a