SIG SAUER P320 Full-Size vs Walther PDP Standard Full Size 4.5"

Both are 9x19mm Parabellum full-size records in this directory. The PDP Standard Full Size 4.5" is ≈0.2 mm longer overall; the P320 Full-Size has the longer barrel by ≈5.08 mm / ≈0.2 in; the PDP Standard Full Size 4.5" lists 1 round more of standard capacity. 2 fields are not comparable — overall height, weight — because the makers publish them on different measurement bases.

Computed differences

Field	Difference
Overall length	≈0.2 mm (PDP Standard Full Size 4.5" is greater)Note: the published inch figures are identical, so this difference does not resolve in that unit.
Overall width	≈3.6 mm / ≈0.15 in (PDP Standard Full Size 4.5" is greater)
Overall height	Not comparable — P320 Full-Size: magazine state not stated by SIG SAUER; PDP Standard Full Size 4.5": magazine state not stated by Walther
Barrel length	≈5.08 mm / ≈0.2 in (P320 Full-Size is greater)
Weight	Not comparable — P320 Full-Size publishes with empty magazine; PDP Standard Full Size 4.5" publishes unloaded
Standard capacity	1 round (PDP Standard Full Size 4.5" is greater)

How these differences are computed: each is the arithmetic difference between the two published figures, and it is only shown where both sources measured the field the same way. Where a source states a measurement basis the other does not match, the row says so instead of subtracting — figures on different bases are not comparable even when the numbers sit side by side. Differences marked ≈ involve at least one figure this directory converted between unit systems, so the difference is no more precise than that conversion.

Published fields, side by side

Field	P320 Full-Size	PDP Standard Full Size 4.5"
Manufacturer	SIG SAUER	Walther
Manufacturer size label	Full-Size	Full Size
Directory frame class	full-size	full-size
Chambering	9x19mm Parabellum	9x19mm Parabellum
Overall dimensions	203 × 32 × 140 mm / 8 × 1.25 × 5.5 in (height: magazine state not stated by SIG SAUER)	≈203.2 × 35.6 × 137.2 mm / 8 × 1.4 × 5.4 in (height: magazine state not stated by Walther)
Barrel length	119.38 mm / 4.7 in	≈114.3 mm / 4.5 in
Weight	802.3 g / 28.3 oz (SIG states "w/ Magazine" and does not say the magazine is empty)	≈680 g / 24 oz (magazine state not stated by Walther)
Standard capacity	17 rounds	18 rounds
Verification	Source verified 2026-08-12	Source verified 2026-08-12

Full records, with every value beside the source it came from: SIG SAUER P320 Full-Size · Walther PDP Standard Full Size 4.5". More from these makers: SIG SAUER · Walther.

Reference information only. Not legal, purchasing, training, carry, storage, or assembly advice. Manufacturer technical data are rounded and may change without notice. Spotted an error? Submit a source-backed correction.