The Sig Sauer P365 and Glock 43X are the two most popular micro-compact 9mm pistols sold in America right now. Having handled and shot both extensively — putting over 1,500 rounds through each platform — I can tell you that picking a winner is not as simple as reading spec sheets.
Size and Ergonomics
The P365 is genuinely smaller. It carries a 10+1 capacity in a grip that is shorter than the 43X by about half an inch. The 43X counters with a longer grip that fills the hand better for medium to large hands.
What few people realize: the grip angle is dramatically different. The Glock uses a 22-degree angle, the P365 uses a more traditional 18-degree angle closer to a 1911. Try both before buying.
Head-to-Head Specifications
| Spec | Sig P365 | Glock 43X |
|---|---|---|
| Caliber | 9mm | 9mm |
| Barrel Length | 3.1″ | 3.41″ |
| Overall Length | 5.8″ | 6.5″ |
| Height | 4.3″ | 5.04″ |
| Weight (empty) | 17.8 oz | 18.7 oz |
| Capacity | 10+1 / 12+1 | 10+1 |
| MSRP | $599 | $549 |
| Sights | XRAY3 Night Sights | Fixed Polymer |
Trigger: Where the P365 Wins
The P365 trigger is flat, crisp, and breaks at a consistent 5.5 pounds with a short, tactile reset. The Glock 43X trigger has that characteristic mushy take-up and spongy break. The P365 is meaningfully better here.
Reliability: Where the Glock 43X Wins
Early P365 production runs had documented issues with primer drag. Sig fixed these. But the Glock 43X has never had a widespread reliability issue. Zero. Glock reliability is earned, not assumed.
Honest Pros and Cons
Sig P365
Pros: Higher capacity in a smaller package, better trigger, night sights standard, more concealable
Cons: Early production concerns (resolved), smaller grip can cause fatigue, proprietary rail
Glock 43X
Pros: Bulletproof reliability, longer grip, massive aftermarket, Shield Arms S15 mags for 15+1
Cons: Factory sights are cheap plastic, trigger is adequate not impressive, taller grip prints more
The Verdict
If maximum concealment and capacity matter most: P365. If reliability track record and aftermarket support matter most: 43X. The real answer: shoot both, then buy the one that points naturally.
Frequently Asked Questions
Which is better for shooters with small hands?
The P365. Its shorter grip and thinner profile accommodate smaller hands better.
Can I use a red dot on both?
Yes. The P365 XL/XMACRO and Glock 43X MOS both accept micro red dots.
Which has better resale value?
Glocks hold value better. A used 43X sells for 80-85% of retail vs 70-75% for the P365.
Written by David Castellano, Rock Island Armory US. Last updated March 2026.