Pros & cons
What works
- Longer sight radius aids precision
- Shares G17 magazines and most aftermarket parts
- Gen4 dual recoil spring and backstrap sizing
- Proven, low-maintenance striker platform
Trade-offs
- Not built for concealment — slide length works against everyday carry
- Not factory optics-cut on Gen4 (MOS came later) — confirm before buying a red dot
- CA roster status must be confirmed before ordering
Specs at a glance
About this product
The Glock 34 Gen4 is a long-slide, competition-oriented version of the Glock 17, built with a 5.31-inch barrel for a longer sight radius and steadier follow-up tracking on target. It's a striker-fired 9mm that shares its frame and magazines with the standard G17, wrapped around a longer slide. Gen4 added the dual recoil spring assembly, reversible magazine catch, and interchangeable backstraps that carried through the rest of the Glock lineup afterward.
What is it used for?
It's built for USPSA, IDPA, and similar competition where a longer sight radius helps precision, and it works equally well as a range or home-defense gun for anyone who likes a Glock trigger and isn't planning to conceal it. The extra slide length is a deliberate tradeoff for a steadier sight picture, not an accident of design. Shooters moving up from a standard G17 or G19 often pick this model specifically to chase tighter groups at distance without switching away from a trigger and grip they already know.
How does it compare to a standard Glock 17?
Same frame, same controls, same magazines — roughly 0.8 inches more barrel and slide length, a longer sight radius, and a marginally more front-heavy balance that some shooters find helps with recoil control during rapid strings. Everything you already know about running a G17 carries over directly.
What fits it?
It uses standard Glock 17-pattern magazines and most G17 aftermarket sights and triggers, but a holster molded for the shorter G17 slide won't necessarily fit this longer barrel and slide correctly — look for a G34-specific or "long slide" holster instead.
Who is this not for?
It's not built for concealed carry — the longer slide works against you under a cover garment. If you want one gun that does both range and everyday carry reasonably well, a standard G17 or G19 fits that role better than this long-slide model. It's also not the right choice if you don't already shoot 9mm regularly, since the whole point of the extra barrel length is marginal — you'll notice the benefit most if you're already shooting enough to see it.
Does it work in California?
Handgun purchases in California go through a licensed FFL with a 10-day wait, DROS, and Firearm Safety Certificate, and the specific model needs to be roster-listed or transferred through an exempt or private-party route — confirm current roster status for the Gen4 G34 before ordering, since listings vary by generation. See our California gun laws page for the full process.
How does it compare to the Glock 35 in this same lineup?
Same long-slide Gen4 architecture, different caliber — our Glock 35 Gen4 is chambered in .40 S&W on a G22-pattern frame and magazine instead of 9mm. Everything about the platform's sight radius and Gen4 features carries over between the two; the choice comes down to which caliber and magazine family you'd rather build around.
FFL transfer required
This item is a firearm and ships only to a licensed FFL dealer, never to a home address. At checkout, enter your preferred dealer as the shipping address, or leave it blank and we will assign a licensed dealer near you at no extra cost. You complete the background check and paperwork with the dealer when you pick up.
California buyers: handguns must be on the California roster for delivery to a California FFL, a Firearm Safety Certificate (FSC) and DROS are handled at the dealer, and the 10-day waiting period applies. Out-of-state buyers receive the firearm through their own local FFL under their state's rules.
Key attributes
| Transfer | Ships to your FFL dealer |
| Caliber | 9mm Luger |
| Barrel | 5.31″ |
| Action | Striker-fired |
| Generation | Gen4 |
| Magazine compatibility | Glock 17-pattern |
Frequently asked questions
- What magazines does it use?
- Standard Glock 17-pattern magazines, limited to 10 rounds for California-compliant configuration.
- Is Gen4 better than Gen3 for this model?
- Gen4 added the dual recoil spring and interchangeable backstrap kit; Gen3 owners generally don't need to upgrade, but Gen4 is the more grip-configurable of the two.
- Can I use G34 aftermarket sights and triggers?
- Yes — it uses the same aftermarket ecosystem as other full-size Glocks, with parts sized for the standard slide width.
- Is it optics-ready?
- Gen4 models are not factory-cut for a red dot; that came later with Glock's MOS slides — confirm which slide cut this specific listing has before assuming it's optics-ready.
- Does the longer barrel add much velocity?
- Modestly, yes — more barrel length generally means a bit more velocity out of 9mm than the standard G17, though it's not the main reason people buy this model.