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FN FNX-45 Tactical .45 ACP
.45 ACP • FN America

FN FNX-45 Tactical .45 ACP

Model: 66968

15
CAPACITY
5.3"
BARREL
2.1
LBS
DA/SA
ACTION
.45 ACP
CALIBER
$1,394
MSRP

Full Specifications

Action Type DA/SA
Trigger DA/SA
Trigger Pull DA 8.8–12.1 lb / SA 3.96–5.06 lb
Safety Ambidextrous Manual Safety/Decocker
Optic Ready Yes
Magazines Included 2
Overall Length 8.6"
Barrel Length 5.3"
Height 6.5"
Width 1.58"
Weight 33.3 oz (2.08 lbs)
Frame Material Polymer
Frame Finish Flat Dark Earth
Slide Material Stainless Steel
Slide Finish Flat Dark Earth
Barrel Material Stainless Steel
Barrel Finish Black PVD
Twist Rate 1:16" RH
Thread Pattern .578x28
Grip Type Interchangeable Backstrap
Country of Origin USA

Threaded .578x28 barrel: compare pistol suppressor prices.

About This Firearm

The FN FNX-45 Tactical is a full-size hammer-fired .45 ACP built for home defense and suppressed range use. It has an MSRP of $1,394, and the muzzle leaves the factory threaded .578x28 with a protector fitted. The slide is also cut and tapped for a red dot and comes with night sights, so a can and a sight both go on without machining.

Every control is doubled. The decocking levers that also act as the manual safety, the slide stop and the magazine release are all fitted on both sides, so a left-handed shooter runs the standard gun. The first shot is a long double-action pull of 8.8 to 12.1 lb and the ones after break at 3.96 to 5.06 lb, so the decocker gets used. Two 15-round magazines with extended base pads come in the box, and interchangeable backstraps adjust the reach, although nothing makes a 1.58-inch double-stack grip narrow.

If you're cross-shopping, the FN 545 MRD holds the same fifteen rounds in a striker-fired gun with one trigger pull to learn, on a 4.1-inch barrel at an MSRP of $930. The Glock G21 Gen5 MOS carries thirteen rounds in a frame 0.2 inch narrower and comes with three magazines, but its muzzle is plain, so a suppressor there starts with a replacement barrel.

Best For

GOOD
Suppressor Host
The 5.3-inch barrel is cold hammer-forged stainless under black PVD, threaded .578x28 with the protector in place, and the night sights are tall enough to be useful while the slide carries a dot. A can screws straight on.
GOOD
Home Defense
The decocker lets the pistol sit hammer down on a chambered round, so the first pull is deliberate and long. Night sights, an optic cut and a rail for a light are already there.
FAIR
Range/Target
Two trigger pulls on the same gun take practice, and the double-action stroke is the one that needs it. Once the hammer is back the single-action break is under 4 lb.

Strengths & Limitations

Strengths
  • A threaded muzzle, an optic-cut slide and night sights, all fitted at the factory.
  • The polymer frame carries replaceable steel frame and slide rails, so the wear surfaces can be renewed instead of retiring the gun.
  • Fully ambidextrous controls, so weak-hand drills need no reversed parts and no second variant.
Limitations
  • Magazines are specific to the FNX-45, so spares come from FN instead of the generic double-stack .45 shelf.
  • With a suppressor and a dot fitted this is a heavy pistol to hold up one-handed, and the muzzle-forward balance gets worse as the can gets longer.
  • Flat Dark Earth polymer and an FDE slide finish will not match black accessories, so a light bought in black does not match the gun.

Category Rankings

How the FN FNX-45 Tactical .45 ACP ranks among full-size .45 ACP handguns.

Capacity
#1 of 21
Top 5%
15 rds
Weight
#8 of 21
Top 38%
2.1 lbs
Barrel
#1 of 21
Top 5%
5.3"
Trigger Pull
#6 of 20
Top 30%
4.5 lbs
MSRP
#11 of 16
Top 69%
$1394
Overall Length
#11 of 21
Top 52%
8.6"

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Where to Buy

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Alternatives to Consider

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NAME BEST PRICE
FN 545 MRD .45 ACP
FN America
$862.99
Glock G21 Gen5 MOS .45 ACP
Glock
—
HK USP .45 ACP
Heckler & Koch
—
HK HK45 .45 ACP
Heckler & Koch
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Smith & Wesson M&P 45 M2.0 .45 ACP
Smith & Wesson
—

Frequently Asked Questions

What thread does the barrel use?

.578x28, with a thread protector installed from the factory. The barrel itself is cold hammer-forged stainless steel with a 1:16 right-hand twist.

Is the red dot included?

No. FN cuts and threads the slide for an optional electronic sight, and the sight is bought separately.

Does the decocking lever double as the safety?

Yes. One lever on each side both drops the hammer and works as a manual safety, so the gun can be carried hammer down on a loaded chamber.

How many rounds does it hold?

Fifteen, in each of the two magazines supplied. FN also builds it with two 10-round magazines for restricted states.