Guns UnpackedIndependent field reference
Directory / Compare / MR920 vs P229 Nitron Compact
Side-by-side · Manufacturer-published fields only

Shadow Systems MR920 vs SIG SAUER P229 Nitron Compact

Both are 9x19mm Parabellum compact records in this directory. The MR920 is ≈1 mm / ≈0.03 in longer overall; its barrel is ≈2.54 mm / ≈0.1 in longer; the MR920 lists 5 rounds more of standard capacity. 2 fields are not comparable — overall height, weight — because the makers publish them on different measurement bases.

Computed differences06
FieldDifference
Overall length≈1 mm / ≈0.03 in (MR920 is greater)
Overall widthNot published by both
Overall heightNot comparable — MR920: magazine state not stated by the source; P229 Nitron Compact: magazine state not stated by SIG SAUER
Barrel length≈2.54 mm / ≈0.1 in (MR920 is greater)
WeightNot comparable — MR920: magazine state not stated by the source; P229 Nitron Compact: magazine state not stated by SIG SAUER
Standard capacity5 rounds (MR920 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.
Size, to scale
To-scale size envelopes: MR920 vs P229 Nitron CompactBoxes drawn from published overall dimensions at one scale, aligned at the rear. Shadow Systems MR920: 181 mm long; SIG SAUER P229 Nitron Compact: 180 mm long.050 mm100 mm150 mmLengthMR920 is 1 mm longer
  • Shadow Systems MR920Length ≈181 mm / 7.125 in
  • SIG SAUER P229 Nitron CompactLength 180 mm / 7.1 in
Boxes, not silhouettes: makers publish a pistol's overall envelope, not its shape, so that is all this draws. Every box is aligned at the rear and drawn at one fixed scale, the same on every page of this site, so drawings compare across pages. It is not life-size on your screen. Heights are not drawn because the heights are not published on one stated basis (MR920: magazine state not stated by the source; P229 Nitron Compact: magazine state not stated by SIG SAUER). Widths are not drawn because MR920 publishes no overall width.
Published fields, side by side
FieldMR920P229 Nitron Compact
ManufacturerShadow SystemsSIG SAUER
Directory frame classCompactCompact
Chambering9x19mm Parabellum9x19mm Parabellum
Overall dimensions≈length 181, height 120.6 mm / length 7.125, height 4.75 in (height: magazine state not stated by the source; width not published)180 × 38 × 137 mm / 7.1 × 1.5 × 5.4 in (height: magazine state not stated by SIG SAUER)
Barrel length≈101.6 mm / 4 in99.06 mm / 3.9 in
Weight≈610 g / 21.5 oz (magazine state not stated by the source)975.2 g / 34.4 oz (magazine state not stated by SIG SAUER)
Standard capacity15 rounds10 rounds
Trigger pull≈20–22.2 N / 4.5–5 lbNot published
VerificationSource verified 2026-08-12Source verified 2026-09-30
Full records, with every value beside the source it came from: Shadow Systems MR920 · SIG SAUER P229 Nitron Compact. More from these makers: Shadow Systems · SIG SAUER.
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 correction.