Home → Handguns → .45 ACP
FN 545 MRD .45 ACP
.45 ACP • FN America

FN 545 MRD .45 ACP

Model: 66-101387

15
CAPACITY
4.1"
BARREL
1.9
LBS
Semi-automatic, striker-fired
ACTION
.45 ACP
CALIBER
$930
MSRP

Full Specifications

Series FN 545 Series
Action Type Semi-automatic, striker-fired
Trigger Striker-fired, target-grade, breaks at approximately 6 lb
Trigger Pull 6.0 lbs
Safety No manual safety (NMS); loaded chamber indicator
Optic Ready Yes
Magazines Included 2
Overall Length 7.7"
Barrel Length 4.1"
Height 6.0"
Width 1.45"
Weight 30.0 oz (1.88 lbs)
Frame Finish Black Cerakote
Slide Material Machined steel
Slide Finish Black Cerakote
Barrel Material Cold hammer-forged steel
Twist Rate 1:16 RH
Grip Type Enhanced grip texture with two interchangeable backstraps
Country of Origin United States
Includes: Two 15-round magazines, two interchangeable backstraps, four MRD mounting plates, owner's manual, locking device, premium zippered case

About This Firearm

The FN 545 MRD is a full-size striker-fired .45 ACP built for duty use and home defense. It has an MSRP of $930, and each of its two magazines holds fifteen rounds. The slide is cut for a red dot and four mounting plates come in the case, so a sight goes on without a gunsmith.

The case also holds two interchangeable backstraps, a locking device and the manual, which covers most of what a buyer would otherwise order separately. This version has no manual safety, just a loaded chamber indicator, and FN sets the trigger at about 6 lb with the same pull on every shot. The grip stands 6 inches tall and measures 1.45 inches across to hold a double-stack .45, which is wide to conceal.

If you're cross-shopping, the Glock G21 Gen5 MOS holds thirteen rounds at 29.1 oz, runs a longer 4.61-inch barrel and ships with three magazines instead of two, although FN includes the optic plates and a case where Glock sells them by the model. The FN FNX-45 Tactical carries the same fifteen rounds but is hammer-fired with a decocker and a threaded muzzle, at an MSRP of $1,394.

Best For

GOOD
Home Defense
Fifteen rounds of .45 ACP, a dot on the slide and a light on the rail with nothing to machine in between. At 30 oz with a 7.7-inch overall length, it is a full-size pistol that still handles indoors.
GOOD
Duty
The barrel is cold hammer-forged with a 1:16 right-hand twist, and the machined steel slide carries front and rear cocking serrations for working it with gloves or wet hands.
FAIR
Concealed Carry
The frame is a duty-size .45, and the grip gives it away under a shirt. A polymer gun at this width still needs a stiff belt and a holster with real stand-off.

Strengths & Limitations

Strengths
  • Four optic mounting plates in the box, so most common red dot footprints are covered at purchase.
  • Two interchangeable backstraps change the reach to the trigger without any parts bought separately.
  • The barrel is cold hammer-forged.
Limitations
  • No manual safety on this version, which rules it out for buyers and agencies that require one.
  • The four plates cover the footprints FN chose, so an unusual sight can still need a plate ordered on its own.
  • Black Cerakote over a machined steel slide looks plain next to a two-tone gun and will show holster wear at the muzzle first.

Category Rankings

How the FN 545 MRD .45 ACP ranks among full-size .45 ACP handguns.

Capacity
#1 of 21
Top 5%
15 rds
Weight
#4 of 21
Top 19%
1.9 lbs
Barrel
#21 of 21
Top 100%
4.1"
Trigger Pull
#19 of 20
Top 95%
6.0 lbs
MSRP
#5 of 16
Top 31%
$930
Overall Length
#1 of 21
Top 5%
7.7"

Compare FN 545 MRD .45 ACP

See how the FN 545 MRD .45 ACP stacks up against similar firearms.

Compatible Ammunition

Find the best prices on compatible .45 ACP ammunition.

Shop .45 ACP Ammo →

Ballistics Calculator

Calculate trajectory, drop, and energy for .45 ACP ammunition.

.45 ACP Ballistics →

Where to Buy

No prices available at this time.

Alternatives to Consider

Similar full-size .45 ACP handguns ranked by similarity.

NAME BEST PRICE
FN FNX-45 Tactical .45 ACP
FN America
—
Glock G21 Gen5 MOS .45 ACP
Glock
—
Smith & Wesson M&P 45 M2.0 .45 ACP
Smith & Wesson
—
Sig Sauer P320 Full Size .45 ACP
Sig Sauer
—
HK HK45 .45 ACP
Heckler & Koch
—

Frequently Asked Questions

What comes in the case?

Two 15-round magazines, two interchangeable backstraps, four optic mounting plates, the owner’s manual, a locking device and a zippered case.

Does it have a manual safety?

No. This is the no-manual-safety version, with a loaded chamber indicator instead. FN builds the 545 in other configurations.

How does it differ from the 545 Tactical?

The Tactical adds a threaded barrel for a suppressor. This is the standard optics-ready gun, with a plain muzzle.

What twist does the barrel use?

1:16, right hand, in a cold hammer-forged barrel.