FN FNX-45 Tactical .45 ACP vs HK HK45 .45 ACP

Both are full-size DA/SA .45 ACP pistols with polymer frames, interchangeable backstraps, a manual safety/decocker and the same 4.5 lb listed trigger pull. Capacity is the widest gap: the FN FNX-45 Tactical .45 ACP holds 15 rounds to the HK HK45 .45 ACP's 10. The FNX also runs a 0.84" longer barrel (5.3" vs 4.46"), is 0.57" longer overall (8.6" vs 8.03"), 0.59" taller (6.5" vs 5.91") and 2.1 oz heavier (33.3 oz vs 31.2 oz). It ships optic-ready with a threaded barrel and suppressor-height night sights; the HK45 has none of those and lists the longer sight radius at 6.63" against 6.4". MSRP is $1,394 against $949.

Pick the FN FNX-45 Tactical if:

• You want 15 rounds of .45 ACP rather than 10
• You want a factory optic cut, a threaded barrel and suppressor-height night sights without aftermarket work
• You want ambidextrous safety/decocker controls and the 5.3" barrel

Pick the HK HK45 if:

• You want the $949 MSRP rather than $1,394, a $445 difference
• You want the smaller, lighter gun: 8.03" long, 5.91" tall and 31.2 oz
• You are shooting irons and want the longer 6.63" sight radius, 0.23" more than the FNX

Action type and listed trigger weight are identical at DA/SA and 4.5 lb. What you are deciding is whether five extra rounds plus the factory optic and suppressor setup are worth $445 and a larger, heavier pistol.