Stonebridge Gunworks Porting Service • Glock 43 / 43X
Glock 43 / 43X C-Style Porting Service
Add Stonebridge Gunworks C-style porting to your compatible factory Glock 43 or Glock 43X slide and factory barrel. This service gives your slimline Glock a clean, factory-inspired ported slide and barrel setup while keeping your existing OEM parts.
This is a slide-and-barrel porting service only. You send in your compatible factory Glock slide and factory Glock barrel, and Stonebridge Gunworks performs the C-style porting work on those parts. The port layout is sized specifically for the shorter slimline barrel and lighter slide mass — intentionally smaller than a Glock 19C-style layout and designed to work with the factory recoil spring assembly.
Service Type
C-style slide and barrel porting
Compatible Factory Parts
Factory Glock 43 and Glock 43X slide-and-barrel sets only
Required Parts
Send only your factory 43 / 43X slide and factory barrel
Finish Note
Black oxide on the machined slide cut area only
Factory Recoil Spring
Designed to run with the factory 43 / 43X recoil spring assembly
Best Add-On
Pair with the Glock 43 / 43X / 48 direct optic cut
Important: This is a machining service for your compatible factory Glock 43 / 43X slide and factory barrel. It is OEM parts only — no aftermarket barrels, aftermarket slides, barrel-only jobs, or slide-only jobs. It does not include a slide, barrel, optic cut, optic, sights, recoil spring, frame, complete pistol, or any additional parts unless those items are ordered separately.
Glock 43 / 43X Porting Fitment
| Part / Setup |
Compatible? |
Notes Before Ordering |
| Factory Glock 43 slide + factory Glock 43 barrel |
Yes |
Send slide and barrel together. |
| Factory Glock 43X slide + factory Glock 43X barrel |
Yes |
Send slide and barrel together. |
| Aftermarket barrel |
No |
OEM Glock barrels only. |
| Aftermarket slide |
No |
OEM Glock slides only. |
| Barrel-only service |
No |
Barrel and slide must be serviced together. |
| Slide-only service |
No |
Barrel and slide must be serviced together. |
| Refinished / coated slide |
Contact first |
This listing is for factory-finish slides only. |
| Complete pistol / frame |
Do not send |
Send only the requested slide and barrel. |
What This Service Includes
- C-style slide porting: Porting of your compatible factory Glock 43 / 43X slide.
- Matching barrel porting: Matching porting of your compatible factory Glock 43 / 43X barrel.
- Properly scaled layout: A slimline port layout sized for the shorter barrel and lighter slide mass.
- Finish: Black oxide finish on the machined slide cut area only — this is not a full slide refinish.
- Factory recoil spring compatibility: Designed to run with the factory 43 / 43X recoil spring assembly.
- Return shipping: Return shipping option selected at checkout.
Ported pistol note: Ported setups vent gas upward through the barrel and slide ports. Test your completed setup with your selected ammunition, sights, optic, and use case before relying on it for carry, duty, competition, or defensive use.
How to Order
1
Confirm Your Model
Make sure your parts match this service: a factory Glock 43 or Glock 43X slide with its factory barrel.
2
Select Return Shipping
Choose your return shipping and carrier insurance options from the product options above before adding the service to your cart.
3
Add Related Services
Want red dot work? Add the Glock 43 / 43X / 48 optic cut to the same order so the porting and optic setup can be planned together.
4
Ship Slide and Barrel
After checkout, send only your factory slide and factory barrel, and include your order number in the package.
Before you ship: Do not send the frame, complete firearm, magazine, ammunition, recoil spring assembly, optic, optic plate, loose optic hardware, or extra accessories unless Stonebridge Gunworks specifically asks you to include them.
Best Same-Order Pairing
If your 43 / 43X slide is already coming in for porting, this is a good time to add a direct optic cut to the same order.
Best Same-Order Add-On
Glock 43 / 43X / 48 Direct Optic Cut
Pair this porting service with a direct-milled optic cut for compact red dot setups while the slide is already in for service.
- Holosun EPS Carry
- Holosun K-footprint optics
- Vortex Defender CCW
- Trijicon RMRcc
Pair with the 43 / 43X / 48 Optic Cut
Why the 43 / 43X Port Layout Is Different
The Glock 43 and 43X use a shorter, lighter slimline slide and barrel system than a Glock 19C-style pistol. Because of that, this service uses a properly scaled port layout rather than simply copying a larger 19C port size onto the smaller platform.
The result is a clean C-style porting package built around the factory 43 / 43X slide, factory barrel, and factory recoil spring assembly.
Frequently Asked Questions
Is this service for the Glock 43, Glock 43X, or both?
This service is for compatible factory Glock 43 and Glock 43X slide-and-barrel sets only.
Do I need to send the recoil spring assembly?
No. Send only the factory slide and factory barrel unless Stonebridge Gunworks specifically instructs otherwise. The porting setup is designed to work with the factory recoil spring assembly.
Are the ports the same size as a Glock 19C?
No. The 43 / 43X port layout is intentionally smaller than a 19C-style layout because the slimline 43 / 43X has a shorter barrel and lighter slide mass.
Can I send an aftermarket barrel or aftermarket slide?
No. This service is for factory Glock barrels and factory Glock slides only.
Can I send only my barrel?
No. C-style porting requires both the factory barrel and factory slide, serviced together.
Is an optic cut included?
No. The optic cut is a separate service. Add the Glock 43 / 43X / 48 optic cut to the same order if you want porting and red dot milling handled together.
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 Stonebridge Gunworks LLC 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's trademarks is for descriptive purposes only. GLOCK, Inc. does not warrant or endorse any products sold by Stonebridge Gunworks LLC.
After placing your order, include your order number, pack the slide and barrel securely, and ship them to us. We uninstall and reinstall your slide's internal parts and iron sights as part of the service.
Local to the Lee's Summit, MO area? Skip shipping and drop off or pick up in person by appointment — Book a drop-off appointment here.
