Sig Sauer · P365 family
Sig Sauer P365 FUSE
The longest barrel in the line with no compensator, and the only model that leaves the factory on the SIG-LOC Compact cut by default.
Specifications
ModelP365 FUSE
Slide length4.3"
Barrel length4.3"
Integrated compensatorNo
Factory capacity21+1
Grip module familyfuse
Optic cutSIG-LOC Compact / RMSc
Which optic cut does it have?
The cut is set per SKU, not per model, so the suffix on the box matters. This is read from the same fitment data the guides below use.
Standard SKUsSIG-LOC Compact
SKUs ending in -RSRMSc
Fit guides
Every optic in these lists is verified against this model’s factory cut, with prices checked against retailer feeds.
Magazines that fit your P365 FUSE
What the maker says fits this model, and how each magazine sits in the grip. A baseplate that extends below the grip adds no rounds: capacity is always shown on its own.
P365 9mm 17rd Magazine (All 9mm Models)Capacity 17 rounds
Flush fit — Factory flush magazine for the FUSE; the FUSE also ships with extended 21-round mags
Not available in: CA, CO, CT, DC, HI, IL, MA, MD, NJ, NY, RI, VT, WA
P365-AXG LEGION 9mm 17rd MagazineCapacity 17 rounds
Flush fit — LEGION alloy basepad; sits flush in the FUSE grip
Not available in: CA, CO, CT, DC, HI, IL, MA, MD, NJ, NY, RI, VT, WA
TTI SIG X-MACRO Completed Magazine w/ Versatile BasepadCapacity 20 rounds
Fits, extends below the grip — Factory 17-round body with TTI's +3 basepad; extends below the grip
Not available in: CA, CO, CT, DC, DE, HI, IL, MA, MD, NJ, NY, RI, VT, WA
P365 9mm 21rd MagazineCapacity 21 rounds
Fits, extends below the grip — The FUSE's factory extended mag; the baseplate meets the grip with no gap
Not available in: CA, CO, CT, DC, DE, HI, IL, MA, MD, NJ, NY, RI, VT, WA
Doesn’t fit the P365 FUSE: P365 9mm 10rd Finger Extension Magazine, P365 9mm 10rd Flush Magazine, P365X/XL 9mm 10rd Flush Magazine, P365/X/XL 9mm 12rd Magazine, P365/X/XL 9mm 15rd Magazine
Prices update from retailer feeds; a listing we could not verify in the last 7 days shows “Check price”. Gunforma may earn a commission on retailer links. Links to a maker's own store earn us nothing.
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Last reviewed 2026-10-02