Head to head
Glock 43X vs SIG P365 Family: Size, Capacity and Optic Cut
Glock’s slim 9mm guns against SIG’s P365 family, each figure shown with the maker’s own label. Checked Nov 4, 2026.
Glock 43X and 48 vs SIG P365, P365X and P365 XL
Every value is from the maker’s own product page, linked in the column heading. SIG figures are for the standard optic-ready variants.
| Measure | G43X | G43X MOS | P365 | P365X | G48 | P365 XL |
|---|---|---|---|---|---|---|
| Caliber | 9x19 mm | 9x19 mm | 9mm Luger | 9mm Luger | 9x19 mm | 9mm Luger |
| Standard capacity | 10 | 10 | 10; also 12 (SIG text: optional 12-round magazine) | 12 | 10 | 12; also 15 (SIG text: 'available 15 + 1') |
| Barrel length | 3.41 in | 3.41 in | 3.1 in | 3.1 in | 4.17 in | 3.7 in |
| Slide length | 6.06 in | 6.06 in | — | — | 6.85 in | — |
| Overall length | 6.50 in | 6.50 in | 5.8 in | 5.8 in | 7.28 in | 6.6 in |
| Height | 5.04 in Height incl. Mag. | 5.04 in Height incl. Mag. | 4.3 in Height | 4.8 in Height | 5.04 in Height incl. Mag. | 4.8 in Height |
| Width | 1.10 in Width (Overall) | 1.10 in Width (Overall) | 1.1 in Overall Width | 1.1 in Overall Width | 1.10 in Width (Overall) | 1.1 in Overall Width |
| Slide width | 0.87 in | 0.87 in | — | — | 0.87 in | — |
| Weight (figure 1) | 16.40 oz without magazine | 16.26 oz without magazine | 17.8 oz Weight (SIG does not state with or without magazine) | 17.8 oz Weight (SIG does not state with or without magazine) | 18.48 oz without magazine | 20.7 oz Weight (SIG does not state with or without magazine) |
| Weight (figure 2) | 18.70 oz with empty magazine | 18.55 oz with empty magazine | — | — | 20.74 oz with empty magazine | — |
| Trigger pull | 24 N | 24 N | — | — | 24 N | — |
| Optic-ready (as listed) | no | yes (MOS) | yes (cut for ROMEO-X COMPACT) | yes | no | yes |
Like-for-like note: Glock lists “Width (Overall)” and two weights (without magazine, with empty magazine); Springfield lists “Grip Width” and weight “w/ Flush Mag”; SIG lists “Overall Width” and one weight without saying whether a magazine is in. Because the definitions differ, we show each maker’s figure with its label and calculate no cross-maker differences.
Optic cut, as each maker states it
- SIG P365, P365X and P365 XL: RX footprint “COMPACT (Shield RMSc)” (P365, P365X, P365 XL).
- Glock G43X MOS and G48 MOS: Glock states “The standard SLIMLINE MOS cut fits the Shield RMSc footprint and uses M4 screws” (Glock optic mounting). The plain G43X and G48 are not listed as optic-ready.
More: pistol red dot footprint chart.
Which to pick (on paper)
- If the shortest grip matters most: the SIG P365 lists a height of 4.3 in; the P365X and P365 XL list 4.8 in; Glock lists 5.04 in “Height incl. Mag.” for the G43X. SIG P365 page.
- If flush-magazine capacity matters: SIG lists a 12-round flush magazine for the P365X and 12 for the P365 XL; Glock lists 10 standard for the G43X and G48. SIG P365X page.
- If you want the longer barrel in a slim gun: the G48 lists 4.17 in and the P365 XL 3.7 in; the G43X lists 3.41 in and the P365X 3.1 in. Glock G48 page.
- If you want a factory optic cut on every model: SIG lists all three P365 versions here as optic-ready with a “COMPACT (Shield RMSc)” footprint; on the Glock side only the MOS models are optic-ready. Glock G43X MOS page.
We have not range-tested these; facts below are from the makers.
Related
- Carry pistol dimensions database
- Glock 43X vs 48 vs 43
- Hellcat vs P365
- SIG P365 models compared
- HK VP9CC vs SIG P365
- Pistol red dot footprint chart
Frequently asked questions
Is the Glock 43X wider than the SIG P365?
The makers measure width differently, so we do not subtract them. Glock lists "Width (Overall)" of 1.10 in for the G43X; SIG lists "Overall Width" of 1.1 in for the P365.
Which weighs less, the Glock 43X or the SIG P365X?
Glock lists the G43X at 16.40 oz without a magazine and 18.70 oz with an empty one. SIG lists the P365X at 17.8 oz and does not say whether a magazine is included, so the figures are not directly comparable.
What red dot footprint does the P365 use?
SIG lists the RX footprint for the P365, P365X and P365 XL as "COMPACT (Shield RMSc)".
Sources
- Glock: G43X product page
- Glock: G43X MOS product page
- SIG Sauer: P365 product page
- SIG Sauer: P365X product page
- Glock: G48 product page
- SIG Sauer: P365 XL product page
Last checked 2026-11-04.
Free weekly email
The Gun Release Report
Get new gun releases and NFA law updates. Free, weekly. Unsubscribe at any time.