Glock G19 Gen5 9mm vs Sig Sauer P365 9mm

This is a size-class decision, not a close spec match. The Glock G19 Gen5 9mm holds 15 rounds at 23.63 oz, 7.28" long, 5.04" tall and 1.34" wide, on a 4.02" barrel with a 6.02" sight radius. The Sig Sauer P365 9mm holds 10 at 17.8 oz, 5.8" long, 4.3" tall and 1.06" wide, on a 3.1" barrel with a 4.9" sight radius. The P365 gives up five rounds, 0.92" of barrel and 1.12" of sight radius to save 5.83 oz, 1.48" of length, 0.74" of grip height and 0.28" of width. Triggers are close at 5.8 lb and 5.5 lb, and neither is optic-ready. MSRP is $647 vs $519.99, with three magazines to the P365's two.

Pick the Glock G19 Gen5 if:

• You want 15 rounds instead of 10 and three magazines in the box
• You want the longer 6.02" sight radius and 4.02" barrel for easier shooting at distance
• Your carry method handles a 1.34" wide, 23.63 oz pistol comfortably

Pick the Sig Sauer P365 if:

• You want the lighter, smaller gun: 5.83 oz less and 0.74" less grip height
• You dress around the gun and 0.28" of width decides whether it prints
• You want XRAY3 day/night sights as issued and the $127.01 lower MSRP ($519.99 vs $647)

The P365 is the gun you carry when the G19 stays home, and the G19 is the one that shoots better when you can carry it. The choice is five rounds and sight radius against roughly six ounces and an inch and a half of length.