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Ruger Mark IV 22/45 Lite .22 LR
.22 LR • Ruger

Ruger Mark IV 22/45 Lite .22 LR

Model: 43910

10
CAPACITY
4.4"
BARREL
1.6
LBS
Semi-Auto
ACTION
.22 LR
CALIBER
$759
MSRP

Full Specifications

Series 22/45 Lite
Action Type Semi-Auto
Trigger Single Action
Safety Ambidextrous Manual Safety
Optic Ready Yes
Magazines Included 2
Overall Length 8.4"
Barrel Length 4.4"
Height 5.5"
Width 1.22"
Weight 25.0 oz (1.56 lbs)
Frame Material Polymer
Receiver Material Aluminum
Receiver Finish Red Anodized
Barrel Material Stainless Steel
Barrel Finish Stainless
Twist Rate 1:16" RH
Thread Pattern 1/2"-28
Grip Type Checkered 1911-Style
Country of Origin USA

About This Firearm

The Ruger Mark IV 22/45 Lite is a semi-automatic .22 LR target pistol built for range work and suppressed shooting. It is still in production. Its receiver is ventilated aerospace-grade aluminum in a red anodized finish, which brings the pistol down to 25.0 oz over a 4.4-inch stainless barrel threaded 1/2-28, with a thread protector already fitted.

A Picatinny rail is installed at the factory, so a dot needs rings and the sight and nothing more. The rear sight adjusts and the front is fixed. The grip frame is polymer with a serrated front strap and a checkered backstrap under checkered 1911-style panels, and the safety is ambidextrous. Two 10-round magazines come with it. The pistol is 8.4 inches long, 5.5 inches tall and 1.22 inches across.

Set against the alternatives, the Ruger Mark IV Standard has an MSRP of $579 on a longer 6.0-inch barrel, 5.1 oz heavier at 30.1 oz, with fixed sights and no rail fitted. The Taurus TX22 Competition has an MSRP of $617, holds 16 rounds in place of 10 on a 5.25-inch threaded barrel, and comes with three magazines.

Best For

GOOD
Suppressed Shooting
The barrel is stainless and threaded with the protector already on it, so the first can screws straight on. A ventilated receiver keeps the balance behind the hand when a tube is hanging off the muzzle.
GOOD
Range/Target
Takedown is a single button at the back of the frame, which tilts the barrel and receiver up and off the grip frame with no tools, so cleaning a rimfire bore after a bulk brick is a two-minute job.
FAIR
Competition
Ten rounds and a 4.4-inch barrel put it behind the longer rimfire competition guns on both counts. At 25.0 oz it swings light between targets, with the rail already fitted.

Strengths & Limitations

Strengths
  • The 1911-style grip panels are screwed on, so any 1911 panel set fits the grip frame.
  • Ruger replaced the Mark III's specific takedown sequence with the one-button system on this generation, so reassembly no longer depends on getting the magazine and hammer in the right order.
  • The receiver is aluminum and the barrel is stainless, so there is no blued steel on the pistol to rust in a range bag.
Limitations
  • At 25.0 oz there is less mass to steady a slow-fire hold than a steel target .22 gives.
  • Ten rounds is modest next to rimfire pistols built around 16-round magazines.
  • The red anodized receiver is a color, not a protective coat, and a scratch through it shows as bright aluminum.

Category Rankings

How the Ruger Mark IV 22/45 Lite .22 LR ranks among compact .22 LR handguns.

Capacity
#4 of 7
Top 57%
10 rds
Weight
#7 of 7
Top 100%
1.6 lbs
Barrel
#1 of 7
Top 14%
4.4"
MSRP
#6 of 6
Top 100%
$759
Overall Length
#7 of 7
Top 100%
8.4"

Where to Buy

No prices available at this time.

Alternatives to Consider

Similar compact .22 LR handguns ranked by similarity.

NAME BEST PRICE
Ruger SR22 .22 LR
Ruger
—
Walther P22Q .22 LR
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—
Smith & Wesson M&P22 Compact .22 LR
Smith & Wesson
—
Sig Sauer P322 .22 LR
Sig Sauer
—
Glock G44 V .22 LR
Glock
—

Frequently Asked Questions

What does 22/45 mean?

The grip frame. Ruger shapes it to a 1911's .45 grip angle and panel pattern, so a 1911 shooter gets a familiar hold on a Mark IV action.

How fast is the rifling?

1:16 right hand, which covers every .22 LR load sold for a pistol.

Why is the receiver ventilated?

To take weight out of it. Ruger cuts slots through the aluminum sleeve that surrounds the barrel, which is where the Lite name comes from.

Does it come with a rail for an optic?

Yes. A Picatinny rail is installed at the factory on this model, so all that is left to buy is the dot and its rings.