Glock G45 Gen5 9mm vs Glock G48 9mm

Sight radius is nearly identical — 6.02" on the Glock G45 Gen5 9mm and 5.98" on the Glock G48 9mm, a 0.04" difference — and neither is listed optic-ready. What separates them is the frame. The G45 is a double-stack holding 17 rounds; the G48 is slimline at 10. The G45 is 0.24" wider (1.34" vs 1.1"), 0.43" taller (5.47" vs 5.04") and 3.74 oz heavier (24.48 oz vs 20.74 oz). The G48 actually carries the longer barrel by 0.15" (4.17" vs 4.02") in a 0.16" shorter package (7.28" vs 7.44"), and its listed trigger pull is 0.4 lb lighter (5.4 lb vs 5.8 lb). MSRP favors the G48 by $109 ($538 vs $647), though the G45 includes three magazines to the G48's two.

Pick the Glock G45 Gen5 if:

• You want 17 rounds rather than 10 in a barrel length within 0.15"
• The taller 5.47" grip gives you a full firing grip without a magazine extension
• Three magazines included is worth the $109 MSRP difference

Pick the Glock G48 if:

• You carry appendix or in lighter clothing and want 1.1" of width instead of 1.34"
• 3.74 oz less weight (20.74 oz vs 24.48 oz) changes how the gun rides all day
• You want the lower $538 MSRP and the slightly longer 4.17" barrel

The barrels and sight radii are close enough to call even, so this is a width-and-capacity decision: 17 rounds in a 1.34" double-stack, or 10 rounds in a 1.1" slimline that weighs almost four ounces less.