FN 509 9mm vs Glock G19 Gen5 9mm

These two are close on paper and close on price: barrels within 0.02" (4.0" vs 4.02"), widths within 0.01" (1.35" vs 1.34"), and MSRPs $8.00 apart at $639.00 against $647.00. Neither is listed optic-ready. The FN 509 9mm carries two more rounds (17 vs 15) and has a 0.3 lb lighter listed trigger (5.5 lb vs 5.8 lb), but it is the bigger gun: 7.4" long and 5.56" tall at 26.9 oz against the Glock G19 Gen5 9mm at 7.28", 5.04" and 23.63 oz, a 3.27 oz difference. The G19 has the longer sight radius, 6.02" against 5.79".

Pick the FN 509 if:

• You want 17+1 rather than 15+1 with essentially no price difference
• You want the lighter listed trigger, 5.5 lb against 5.8 lb, and 3-dot luminescent sights front and rear
• Interchangeable backstraps matter for fitting the grip to your hand

Pick the Glock G19 Gen5 if:

• Carry size decides it: 23.63 oz and 5.04" of grip height against 26.9 oz and 5.56"
• You want the longer sight radius, 6.02" against 5.79", with fixed sights
• You want three magazines included rather than two

At an $8.00 MSRP difference, price is not the deciding factor. It comes down to whether two extra rounds, a 0.3 lb lighter trigger and adjustable backstraps are worth 3.27 oz and half an inch of grip height.