This directory holds 8 verified records in the same class and chambering as the SIG SAUER P320 Full-Size: 9x19mm Parabellum full-size pistols from 6 manufacturers. The nearest, the PDP Standard Full Size 4.5", sits 0 mm from the subject on published overall length; the furthest, 18 mm. They are ordered by that distance — a measured criterion, not a ranking. Nothing on this page is ranked or recommended.
The PDP Standard Full Size 4.5" is ≈0.2 mm longer overall, ≈3.6 mm / ≈0.15 in wider, and ≈5.08 mm / ≈0.2 in less barrel. It lists 1 round more of standard capacity. 2 fields do not compare — overall height and weight — because the two sources publish them on different measurement bases. On overall length, the published inch figures are identical, so this difference does not resolve in that unit.
The G17 is 1 mm / 0.05 in shorter overall, 2 mm / 0.09 in wider, and 5.38 mm / 0.21 in less barrel. Both list 17-round standard magazines. 2 fields do not compare — overall height and weight — because the two sources publish them on different measurement bases.
The G47 is 1 mm / 0.05 in shorter overall, 2 mm / 0.09 in wider, and 5.38 mm / 0.21 in less barrel. Both list 17-round standard magazines. 2 fields do not compare — overall height and weight — because the two sources publish them on different measurement bases.
The P226 Nitron Full-Size is 7 mm / 0.3 in shorter overall, 6 mm / 0.25 in wider, and 7.62 mm / 0.3 in less barrel. It lists 7 rounds fewer of standard capacity. One field does not compare — weight — because the two sources publish them on different measurement bases.
The PX4 Storm Full Size (Type F) is 11 mm / 0.45 in shorter overall, 4 mm / 0.17 in wider, and 17.38 mm / 0.68 in less barrel. Both list 17-round standard magazines. 2 fields do not compare — overall height and weight — because the two sources publish them on different measurement bases.
The APX A1 Full Size is 13 mm / 0.5 in shorter overall, 1.1 mm / 0.05 in wider, and 11.38 mm / 0.45 in less barrel. Both list 17-round standard magazines. 2 fields do not compare — overall height and weight — because the two sources publish them on different measurement bases.
The M&P 9 M2.0 is 15 mm / 0.6 in shorter overall and 11.38 mm / 0.45 in less barrel. Both list 17-round standard magazines. One field does not compare — weight — because the two sources publish them on different measurement bases.
The G3 is ≈18.1 mm / ≈0.72 in shorter overall, ≈1.5 mm / ≈0.05 in narrower, and ≈17.78 mm / ≈0.7 in less barrel. Both list 17-round standard magazines. 2 fields do not compare — overall height and weight — because the two sources publish them on different measurement bases.
These are related models, not substitutes: SIG SAUER publishes this record in the same P320 line as the P320 Full-Size. They are listed because a reader asking what else is like this pistol is often served by them, and kept separate because the maker's own line is a different relation from a competing model.
The P320-M18 is 20 mm / 0.8 in shorter overall, 9 mm / 0.35 in wider, and 20.32 mm / 0.8 in less barrel. Both list 17-round standard magazines. One field does not compare — weight — because the two sources publish them on different measurement bases.
How this set is derived: every record above is one the directory already publishes a side-by-side page for, so this page adds no comparability claim of its own. A record qualifies as a substitute where it is source-verified and shares both this record's chambering and its directory frame class; a frame class is assigned from the manufacturer's own published size label and never inferred from measurements, so a pistol whose maker publishes no size class appears in nobody's substitute list. Every figure behind the differences above is the manufacturer's published one, and a difference is stated only where both makers measured the field the same way.
What this page will not do: name a best choice, rank the records, or say which suits a person, a purpose, or a jurisdiction. Those depend on fit, training, lawful use and equipment this directory holds no verified data on. It lists what is comparable and what the sources publish, which is the part that can be checked.
Reference information only. Not legal, purchasing, training, carry, storage, or assembly advice. Manufacturer technical data are rounded and may change without notice.