Springfield Hellcat vs SIG P365 (and Hellcat Pro vs P365 XL)

By Cole Harlan, EditorChecked Nov 4, 2026How we verifyEditorial standardsCorrections

Hellcat vs Hellcat Pro

Same maker and same definitions, so the differences are fair. Every value is from Springfield’s product pages.

Springfield Hellcat 3 in OSP and Hellcat Pro OSP. All values are the maker’s own, as shown on its product page. — means the page gives no value.
Measure	Hellcat 3" Micro-Compact OSP	Hellcat Pro OSP
Caliber	9mm	9mm
Standard capacity	11; also 13 (extended mag)	15; also 17 (extended mag)
Barrel length	3 in	3.7 in
Slide length	—	—
Overall length	6 in	6.6 in
Height	4 in Height w/ Flush Mag (4.5 in w/ Extended Mag)	4.8 in Height w/ Flush Mag (5.3 in w/ Extended Mag)
Width Springfield Armory’s label: “Grip Width”	1 in	1 in
Slide width	—	—
Weight (figure 1) Springfield Armory’s label: “w/ Flush Mag”	17.9 oz	21 oz
Weight (figure 2) Springfield Armory’s label: “w/ Extended Mag”	18.3 oz	21.4 oz
Trigger pull	—	—
Optic-ready (as listed)	yes (OSP; slide deck cut for a micro red dot)	yes (OSP)

Barrel: 3.7 − 3 = 0.7 in longer on the Hellcat Pro (calculated by GunReleases).
Overall length: 6.6 − 6 = 0.6 in longer on the Hellcat Pro (calculated by GunReleases).
Height “w/ Flush Mag”: 4.8 − 4 = 0.8 in taller on the Hellcat Pro (calculated by GunReleases).
Grip Width: both 1 in.
Weight “w/ Flush Mag”: 21 − 17.9 = 3.1 oz heavier on the Hellcat Pro (calculated by GunReleases).

Hellcat vs P365 and Hellcat Pro vs P365 XL

Springfield Hellcat and Hellcat Pro against SIG P365 and P365 XL. All values are the maker’s own, as shown on its product page. — means the page gives no value.
Measure	Hellcat 3" Micro-Compact OSP	P365	Hellcat Pro OSP	P365 XL
Caliber	9mm	9mm Luger	9mm	9mm Luger
Standard capacity	11; also 13 (extended mag)	10; also 12 (SIG text: optional 12-round magazine)	15; also 17 (extended mag)	12; also 15 (SIG text: 'available 15 + 1')
Barrel length	3 in	3.1 in	3.7 in	3.7 in
Slide length	—	—	—	—
Overall length	6 in	5.8 in	6.6 in	6.6 in
Height	4 in Height w/ Flush Mag (4.5 in w/ Extended Mag)	4.3 in Height	4.8 in Height w/ Flush Mag (5.3 in w/ Extended Mag)	4.8 in Height
Width	1 in Grip Width	1.1 in Overall Width	1 in Grip Width	1.1 in Overall Width
Slide width	—	—	—	—
Weight (figure 1)	17.9 oz w/ Flush Mag	17.8 oz Weight (SIG does not state with or without magazine)	21 oz w/ Flush Mag	20.7 oz Weight (SIG does not state with or without magazine)
Weight (figure 2)	18.3 oz w/ Extended Mag	—	21.4 oz w/ Extended Mag	—
Trigger pull	—	—	—	—
Optic-ready (as listed)	yes (OSP; slide deck cut for a micro red dot)	yes (cut for ROMEO-X COMPACT)	yes (OSP)	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

Hellcat Pro OSP: “milled slide fitting the Springfield Micro footprint” (Springfield).
Hellcat 3 in OSP: slide deck “cut to accept a micro red dot sight”; the page does not name the footprint (Springfield).
P365 and P365 XL: RX footprint “COMPACT (Shield RMSc)” (P365, P365 XL).

Which to pick (on paper)

If flush-magazine capacity matters: Springfield lists an 11-round flush magazine for the Hellcat and 15 for the Hellcat Pro; SIG lists 10 for the P365 and 12 for the P365 XL. Springfield Hellcat Pro page.
If the shortest grip matters: Springfield lists the Hellcat at 4 in “w/ Flush Mag”; SIG lists the P365 at 4.3 in. Springfield Hellcat page.
If barrel length matters in the larger pair: the Hellcat Pro and P365 XL both list 3.7 in. SIG P365 XL page.
If you already own a Shield RMSc-footprint dot: SIG lists the P365 family slide as “COMPACT (Shield RMSc)”; Springfield lists the Hellcat Pro as Springfield Micro. SIG P365 page.

We have not range-tested these; facts below are from the makers.

Frequently asked questions

Is the Hellcat smaller than the P365?

The makers define their measurements differently. Springfield lists the Hellcat at 6 in long and 4 in tall w/ flush mag, with a 1 in grip width; SIG lists the P365 at 5.8 in long, 4.3 in tall and 1.1 in overall width. We do not subtract across makers.

How much bigger is the Hellcat Pro than the Hellcat?

On Springfield's figures, the Hellcat Pro is 0.7 in longer in barrel, 0.6 in longer overall, 0.8 in taller w/ flush mag and 3.1 oz heavier w/ flush mag (calculated by GunReleases). Both list a 1 in grip width.

Sources

Last checked 2026-11-04.

Hellcat vs P365 and Hellcat Pro vs P365 XL: Maker Specs