Glock 33 Gen4 .357 SIG
Model: PG3350201
Glock 33 Gen4 .357 SIG
Model: PG3350201
Full Specifications
About This Firearm
The Glock 33 Gen4 is the subcompact .357 SIG, a 6.42" pistol weighing 21.87 oz with a 3.43" barrel and 9+1 capacity. It shares the G27 .40 S&W frame, accepts G27 and G23 magazines as extended reloads, and is essentially the same gun with a different barrel. The surprising thing about the G33 is what happens to recoil at this size: .357 SIG's sharp impulse hits harder in a 21.87 oz subcompact frame than the same cartridge in a heavier compact or full-size Glock. Owners consistently report the G33 takes more deliberate practice to shoot quickly than the Glock G26 Gen5 9mm in the same dimensions.
That recoil reality is the G33's defining trait. It is one of the smallest, lightest .357 SIG carry pistols ever produced, and it is also the one that punishes the shooter most. The Glock G27 Gen5 .40 S&W in the same frame is documented as easier to control, and the G26 in 9mm is dramatically easier. The natural alternative in the .357 SIG subcompact class is the Sig P239 .357 SIG, a 29.5 oz alloy-framed single-stack, heavier by 7.6 oz, which softens recoil meaningfully, but at the cost of a much narrower magazine and DA/SA trigger. The G33 is the right choice only if you already own a G31 or G32 and want the smallest possible backup that shares your magazines.
Best For
Strengths & Limitations
- Accepts G32 (13-round) and G31 (15-round) magazines as extended reloads. A G33 owner already running a G31 effectively has shared magazine logistics across two pistols.
- One of the smallest, lightest .357 SIG carry pistols available at 1.26" wide and 21.87 oz, with a true subcompact 4.21" grip height.
- Owners and reviewers consistently report the G33's felt recoil is harder to manage than the G27 .40 S&W in the same frame, and far harder than the G26 9mm. The 21.87 oz subcompact frame does not absorb .357 SIG's sharp impulse well.
- The short grip allows only a two-finger hold on the flush 9-round magazine. A pinky extension or G32 magazine is near-mandatory for any extended shooting.
- 9+1 flush capacity is the lowest in any Glock .357 SIG. Owners running it as a primary carry typically pair it with a G32 13-round magazine as a reload, since the flush mag holds less than most modern micro-compact 9mms in similar dimensions.
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Frequently Asked Questions
What is the first upgrade most G33 owners install?
A magazine pinky extension. The flush 9-round magazine leaves the average adult shooter with a two-finger grip, which makes .357 SIG recoil substantially harder to manage. A Pearce Grip or factory Glock +0 extension adds a finger groove without adding capacity, restores a full three-finger grip, and significantly improves control. Most owners describe this as the single best $15 spent on the gun. The second common upgrade is replacing the plastic factory sights with steel night sights for low-light defensive use.
Do G31 magazines work in the Glock 33?
Yes. G31 15-round and G32 13-round magazines both fit and feed the G33 reliably. They extend below the grip, about 1" for the G32 mag and about 1.5" for the G31 mag, but lock in, drop free, and function without modification. This is one of the G33's main practical advantages: an owner running a G31 as a duty or home defense pistol can carry the G33 as a backup with the larger gun's magazines as reloads, which means one magazine type covers both pistols. The reverse is not true: G33 9-round magazines fit the G31 but offer no capacity reason to use them.
