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SIG P365 Models Compared: Which P365 Fits You?

By , EditorUpdated How we verifyEditorial standards

SIG calls the P365 America's #1 selling handgun, and the family now runs from the pocket-sized original to the 21-round FUSE. Every model shares the same serialized stainless fire control unit, so the differences come down to the slide, barrel, grip module and magazine. This page compares six models on the numbers SIG publishes. That includes the new P365-AXG Equinox. Figures come from SIG's product pages and SIG's own P365 line guide, checked October 30, 2026. Where SIG's page didn't show a figure, we say so.

Specs side by side

ModelBarrelLengthHeightWidthWeightCapacityOptic cutComp
P365 (original)3.1 inNot yet verifiedNot yet verifiedNot yet verifiedNot yet verified10+1 flush (12 and 15 extended)Not yet verifiedNone listed
P365-XL3.7 in6.6 in4.8 in1.1 in20.7 oz12 rd (10 rd compliant)Shield RMScNone listed
P365-XMACRO3.7 in6.6 in5.2 in1.1 in22 oz with magazine17 rd (10 rd compliant)Shield RMScNone (non-ported slide)
P365-FUSE4.3 in7.2 in5.1 in1.1 in23.1 oz21 rd (ships with two 21s and one 17)Shield RMSc (SIG-LOC COMPACT on the ROMEO-X version)None listed
P365-AXG LEGION3.1 in6.6 in5.2 in1.4 in26 oz17 rd (three included)Optic ready; footprint not yet verifiedTwo-port integrated expansion chamber
P365-AXG EQUINOX3.1 in*6.8 in*4.7 in*1.2 in*22.1 oz with magazine*12 rd (three included)Shield RMSc / SIG-LOC COMPACTTwo-port integrated expansion chamber

From SIG's P365-XL, P365-XMACRO, P365-FUSE, P365-AXG LEGION and P365-AXG EQUINOX product pages and SIG's February 25, 2026 P365 line guide, checked October 30, 2026. Original P365 figures are from SIG's line guide only. We couldn't reach a SIG product page for the base model, so its dimensions are marked Not yet verified. *The Equinox's barrel, length, height, width and weight weren't shown on SIG's page on our check date. Those figures come from a Midwest Gun Works listing for part 365AXG-9-COMP-EQ, cited on our Equinox release page. The AXG LEGION capacity comes from SIG's line guide. FUSE height and weight are for the iron-sight model; SIG lists the ROMEO-X version at 5.7 in and 24.8 oz.

We don't print a price for any model here. SIG's product pages didn't show an MSRP for these pistols on our check date, and we don't cite retailer prices as MSRP.

Size: three slides, three grips

The P365 family uses three slide and barrel lengths. The original P365 and the P365X use the short 3.1-inch barrel. SIG describes the P365X as that short slide on the longer grip module. The XL and XMACRO step up to 3.7 inches, which SIG says adds sight radius for better accuracy at distance. The FUSE is the largest at 4.3 inches. SIG calls it "the largest addition to the matrix," blurring the line between a carry gun and a duty pistol.

Grip modules set capacity. The XL's X grip holds a 12-round magazine. The XMACRO and AXG LEGION grips take 17-rounders, and the FUSE takes 21. All four polymer-grip models are listed at 1.1 inches wide. The alloy AXG LEGION is 1.4 inches wide and the heaviest at 26 oz.

AXG Legion vs AXG Equinox

Both are alloy-grip P365s with a two-port integrated expansion chamber in the slide and G10 grip panels. The LEGION is finished in LEGION Gray Cerakote, has an extended magwell and ships with three 17-round magazines. The Equinox is a Custom Works configuration with a polished Equinox slide, black AXG grip, E-nickel controls and trigger, and three 12-round steel magazines. SIG lists the Equinox's optic cut as COMPACT (Shield RMSc) / SIG-LOC COMPACT. Read our P365-AXG Equinox release page for its full spec list and sources.

Optics: what fits

SIG lists the XL, XMACRO and FUSE with a Shield RMSc footprint and the Equinox with RMSc or SIG-LOC COMPACT. That opens up most slim pistol dots, including the four in our RMSc micro red dot comparison. If you carry in rain or sweat, read our enclosed vs open emitter guide before you choose one.

Which P365 should you buy?

More: HK VP9CC vs SIG P365, new micro-compact pistols of 2026, best new handguns of 2026, and all comparisons.

Frequently asked questions

What is the difference between the SIG P365, P365-XL and P365-XMACRO?
Barrel and grip. The original P365 has a 3.1-inch barrel and 10-round flush magazine. The XL has a 3.7-inch barrel and 12-round magazines. The XMACRO keeps the 3.7-inch barrel and adds a bigger grip that takes 17-round magazines. Per SIG's pages, all three are about 1.1 inches wide.
Which P365 holds the most rounds?
The P365-FUSE. SIG ships it with two 21-round and one 17-round steel magazines.
How much does the SIG P365-AXG Equinox cost?
SIG's product page didn't show an MSRP when we checked on October 30, 2026, so we don't print one. Check your dealer for current pricing.
Does the P365-AXG Equinox have a compensator?
Yes. SIG lists a two-port integrated expansion chamber on the Equinox's polished slide.
What red dot fits a SIG P365?
SIG lists the Shield RMSc footprint on the P365-XL, XMACRO and FUSE, and RMSc or SIG-LOC COMPACT on the AXG Equinox. RMSc-footprint dots like the Canik ONYXc, Canik PHANTOMc, Holosun EPS-CORE and EOTech EFLX CE are made for that cut.

Sources

  1. SIG Sauer: P365-AXG EQUINOX (checked Oct. 30, 2026)
  2. SIG Sauer: P365-AXG LEGION (checked Oct. 30, 2026)
  3. SIG Sauer: P365-XMACRO (checked Oct. 30, 2026)
  4. SIG Sauer: P365-FUSE (checked Oct. 30, 2026)
  5. SIG Sauer: P365-XL (checked Oct. 30, 2026)
  6. SIG Sauer: The P365 line of EDC pistols, Feb. 25, 2026 (checked Oct. 30, 2026)
  7. Midwest Gun Works: 365AXG-9-COMP-EQ listing (Equinox dimensions)

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