Brownells Complete Window Slide Assembly W/Ported Barrel For Glock 43

The Brownells Complete Window Slide Assembly with Ported Barrel for Glock 43 is a fully machined, ready-to-install upper for custom builds or factory upgrades. If you're assembling a precision Glock 43 clone or refreshing your carry gun with a performance-tuned slide, this window-ported configuration delivers recoil management without adding muzzle length. The ported design vents gases through ports angled into the slide's top window, countering muzzle rise so your sights stay downrange between shots—and since the compensation is integral to the barrel, your finished pistol still fits standard Glock 43 holsters.

Built from 416 stainless steel billet and finished in hard black Nitride, the slide ships fully assembled with barrel, sights, and internal parts already installed. The ported barrel itself is precision-machined from premium 416R stainless. You get front and rear iron sights (standard height) for primary use or as backup irons behind a red dot, plus the slide is pre-cut for a Holosun 407K footprint reflex mount, with a polymer cover plate included if you're running irons only. The distinctive racked serrations—wide and shallow on the rear, mirrored on the front—give you solid purchase from any grip angle and make slide manipulation smooth whether you're racking hard or press-checking the chamber.

Compatibility is straightforward: it fits factory Glock 43 frames and aftermarket clones built to Glock spec. Do note that Brownells specifies a channel liner is required for this slide and must be press-fit with a tool—they recommend part #777-100-017 for installation. This is a true drop-in top half for anyone building a custom pistol or upgrading a stock G43 with a tuned, compact carry package that doesn't sacrifice ergonomics or holster fit.

Key Features

• Fully assembled with barrel, sights, and internal parts—ready to install on compatible frames
• Ported barrel with window design reduces muzzle rise while keeping overall length compact and holster-friendly
• 416 stainless steel billet machined to Glock factory specs, black Nitride finish for durability
• Pre-cut for Holosun 407K reflex sight mounting (cover plate included)
• Standard-height front and rear iron sights included
• Front and rear racking serrations for secure manipulation from any position
• Compatible with factory Glock 43 and spec-correct aftermarket frames

Specifications

Frequently Asked Questions

Does this slide fit my Glock 43 frame?

Yes, this slide is machined to Glock factory specifications and fits standard factory Glock 43 frames as well as aftermarket frames built to the same spec. Installation is straightforward—you'll need a channel liner (part #777-100-017 recommended) which requires a press-fit tool to install.

Can I mount a red dot sight on this slide?

Yes. The slide comes pre-cut with a mounting slot designed for reflex sights in the Holosun 407K footprint. A polymer cover plate is included if you want to run iron sights only. Adapter plates for RMR-pattern optics are available separately.

Will this ported slide fit my holster?

Yes. Unlike a muzzle-mounted compensator, the porting is integrated into the slide window, so the overall length and profile remain consistent with a standard Glock 43. The pistol will fit most holsters designed for the Glock 43.

What's included in the box?

The complete slide assembly ships fully installed with the ported barrel, front and rear sights, internal parts, a polymer optic cover plate, and a recoil spring assembly. You do not receive a channel liner; that must be ordered separately.