FN 509 Compact 9mm vs Glock G19 Gen5 9mm

Both are compact 9mm strikers without a factory optic cut, priced within $8 of each other at MSRP ($639 for the FN 509 Compact 9mm, $647 for the Glock G19 Gen5 9mm). The 509 Compact is the smaller gun: 6.8" long vs 7.28" and a 3.7" barrel vs 4.02". The G19 is the lighter one, by 1.87 oz (23.63 oz vs 25.5 oz), and holds three more rounds at 15+1 vs 12+1, with a 0.42" longer sight radius (6.02" vs 5.6"). The FN's trigger is listed 0.3 lb lighter at 5.5 lb vs 5.8 lb, and it uses a Hi-Viz front sight against the Glock's fixed sights. Height and width are nearly identical at 5.0" vs 5.04" and 1.35" vs 1.34".

Pick the FN 509 Compact if:

• You want the shorter 6.8" slide length and 3.7" barrel for carry
• You want interchangeable backstraps to fit the grip rather than a fixed grip profile
• You want the lighter listed trigger (5.5 lb vs 5.8 lb) and a Hi-Viz front sight out of the box

Pick the Glock G19 Gen5 if:

• You want three more rounds (15+1 vs 12+1) at nearly the same height and width
• You want 1.87 oz less on the belt (23.63 oz vs 25.5 oz)
• You want the longer 6.02" sight radius and a third magazine included rather than two

Price, height and width are close enough to ignore. It comes down to the 509's shorter slide and adjustable grip against the G19's higher capacity and lighter weight.