Ruger American Rimfire .17 HMR 16.1-Inch Rifle

The Ruger American Rimfire .17 HMR 16.1-Inch is a bolt-action rimfire rifle chambered in .17 HMR.

Identified by Ruger as Model 8393, this configuration combines a 16.10-inch threaded predator barrel with a lightweight black synthetic stock.

In addition, the rifle incorporates Ruger’s Power Bedding system, Marksman Adjustable trigger, flush-mounted rotary magazine and factory-installed Picatinny scope base.

Together, these characteristics distinguish Model 8393 from longer-barreled, Target and other American Rimfire configurations.

Ruger American Rimfire .17 HMR 16.1-Inch Overview

The Ruger American Rimfire .17 HMR 16.1-Inch represents a compact, optics-oriented configuration within Ruger’s American Rimfire family.

The rifle uses a short 16.10-inch barrel, black synthetic stock and matte-blued alloy-steel construction.

Furthermore, Ruger equips this model without traditional front or rear iron sights.

Instead, a factory-installed Picatinny rail provides the primary factory optics interface.

As a result, Model 8393 is easily distinguished from American Rimfire configurations fitted with conventional iron sights.

American Rimfire .17 HMR Chambering

Model 8393 is chambered in .17 HMR, or .17 Hornady Magnum Rimfire.

The chambering differentiates it from American Rimfire models in .22 Long Rifle and .22 Winchester Magnum Rimfire.

Additionally, Ruger pairs its .17 HMR American Rimfire models with the JMX-1 rotary-magazine system.

For additional informational firearm pages, browse the Gunvexa firearm reference catalog.

For exact model identification, however, always confirm the caliber markings on the individual barrel and receiver.

16.10-Inch Predator Barrel

The rifle uses a 16.10-inch barrel.

Ruger describes this particular barrel as a 0.720-inch predator barrel.

Its profile distinguishes Model 8393 from American Rimfire variants using different barrel lengths and contours.

Furthermore, the short barrel contributes to the factory-published 35-inch overall length.

Therefore, barrel length is one of the most important identifying specifications for this exact model.

Cold-Hammer-Forged Barrel

Ruger identifies the barrel as cold hammer forged.

The manufacturing method forms the rifling during production using substantial mechanical pressure.

Additionally, Ruger describes the process as producing precise rifling and long service life.

For a technical product page, cold-hammer-forged construction should therefore be documented separately from barrel length and exterior finish.

0.720-Inch Predator Barrel Profile

Model 8393 uses a published 0.720-inch predator barrel.

This specification refers to the heavier barrel profile used on the model.

The predator contour gives the short 16.10-inch barrel a visibly different appearance from lighter sporting-profile rimfire barrels.

Consequently, barrel diameter provides another useful identification detail when documenting the rifle.

1:9 RH Twist Rate

The .17 HMR barrel uses a 1:9-inch right-hand twist.

Ruger also identifies the barrel as having six grooves.

Together, twist direction, twist rate and groove count provide useful technical specifications for the factory barrel.

Therefore, these values should be retained when creating a detailed Model 8393 reference page.

Six-Groove Rifling

Ruger publishes a six-groove rifling specification for Model 8393.

This specification accompanies the 1:9 RH twist.

Although groove count is less visually obvious than barrel length or stock color, it provides additional technical detail for identifying the factory barrel configuration.

Consequently, it belongs in the complete specification list.

Threaded 1/2×28 Muzzle

The barrel uses a 1/2×28 thread pattern.

Ruger installs a thread protector at the factory.

This threaded muzzle is another important distinction between Model 8393 and unthreaded American Rimfire variants.

Furthermore, the factory thread protector preserves the external thread when no compatible muzzle accessory is installed.

Factory Thread Protector

A factory thread protector is included on the threaded muzzle.

Its finish visually complements the matte-blued barrel.

Because thread protectors can be replaced or removed on previously owned examples, however, an individual rifle should be inspected when documenting exact condition.

The underlying factory thread pattern remains 1/2×28 for Model 8393.

Matte-Blued Finish

Ruger identifies the rifle’s exterior metal finish as Matte Blued.

The dark finish covers the alloy-steel components and contrasts with the black synthetic stock.

Unlike stainless American Rimfire configurations, Model 8393 uses alloy steel with this matte-blued treatment.

Therefore, material and finish provide useful clues for distinguishing the model from visually similar variants.

Alloy-Steel Construction

Ruger lists the primary material as alloy steel.

This specification applies to the barreled-action configuration.

The alloy-steel construction is paired with the matte-blued exterior finish.

Consequently, Model 8393 differs from American Rimfire Stainless configurations that use stainless-steel components and a lighter metallic appearance.

Black Synthetic Stock

The rifle uses a black synthetic stock.

Ruger describes the stock as lightweight and ergonomic, with modern forend contouring and grip serrations.

Furthermore, the synthetic material provides a different appearance from laminate-stock Target models.

The black stock is therefore one of the easiest external features to identify in product photographs.

Interchangeable Stock Modules

Synthetic-stock American Rimfire rifles use Ruger’s interchangeable stock-module system.

Model 8393 includes a standard-length, high-comb module intended for use with optics.

The module can be changed by removing the rear sling-swivel stud.

Additionally, Ruger offers other stock modules for different comb-height and length-of-pull configurations.

Therefore, the stock system represents an important design characteristic of the platform.

High-Comb Stock Module

The factory configuration includes a high-comb stock module.

Its raised comb is intended to correspond with optic use.

This makes sense for Model 8393 because the rifle has no factory front or rear iron sights and instead includes a Picatinny scope base.

Consequently, stock-module configuration and optics interface complement one another in the factory design.

13.75-Inch Length of Pull

Ruger publishes a 13.75-inch length of pull for Model 8393.

This measurement corresponds with the standard stock module supplied with the rifle.

Alternative compact stock modules can change the stock dimensions.

Therefore, the published 13.75-inch specification should be understood as the factory configuration of this particular model.

Ruger Power Bedding System

The American Rimfire incorporates Ruger’s patented Power Bedding system.

Integral bedding blocks positively locate the receiver within the stock.

Additionally, Ruger describes the system as free-floating the barrel.

This arrangement represents one of the defining structural features of the American Rimfire platform.

Free-Floated Barrel Arrangement

The Power Bedding system supports the receiver while allowing the barrel to remain free floated within the stock.

From a specification perspective, this architecture differentiates the design from rimfire rifles where the stock directly contacts much of the barrel.

The free-float arrangement is part of Ruger’s factory American Rimfire design rather than an aftermarket modification.

Ruger Marksman Adjustable Trigger

Model 8393 includes the Ruger Marksman Adjustable trigger.

Ruger specifies an adjustment range of approximately 3 to 5 pounds.

The trigger system is one of the recognizable features shared across the American Rimfire family.

Furthermore, its factory-adjustable design distinguishes it from fixed-weight trigger systems found on some rimfire platforms.

Three-to-Five-Pound Trigger Range

The manufacturer’s published trigger range is 3–5 lb.

This specification describes the adjustment range provided by Ruger’s Marksman Adjustable trigger system.

When documenting an individual used rifle, however, trigger condition should be checked because previously owned firearms may have been modified.

For an original factory configuration, the Marksman Adjustable trigger remains the correct specification.

Tang Safety

The rifle uses a tang-mounted safety.

The safety is positioned along the upper rear section of the action where it remains visible and accessible.

This location provides another recognizable American Rimfire design characteristic.

Consequently, safety style belongs in the rifle’s technical specification list.

60-Degree Bolt Throw

The American Rimfire action uses a 60-degree bolt throw.

The relatively short bolt rotation provides clearance around mounted optics.

This characteristic is especially relevant on Model 8393 because the rifle is factory configured around a Picatinny scope base.

Therefore, the bolt throw represents both a mechanical specification and an identification detail.

Receiver-Mounted Bolt Release

Ruger incorporates a receiver-mounted bolt release.

The release allows the bolt to be removed from the receiver without requiring the trigger to be pulled.

This is specifically highlighted by Ruger as part of the American Rimfire design.

Consequently, the bolt-release system provides another useful technical distinction.

Factory Picatinny Scope Base

Model 8393 includes a factory-installed one-piece Picatinny scope base.

The rail sits along the top of the receiver.

Because the rifle has no factory front or rear sights, the Picatinny rail is an especially important part of the configuration.

Furthermore, it provides a clear visual clue for identifying this optics-focused version.

No Factory Iron Sights

Ruger lists:

• Front sight: None
• Rear sight: None

for Model 8393.

This differentiates it from American Rimfire configurations supplied with conventional open sights.

Instead, the factory Picatinny rail and high-comb stock module create an optics-oriented arrangement.

Therefore, the absence of iron sights is an intentional part of the factory specification.

JMX-1 Rotary Magazine

The .17 HMR rifle uses Ruger’s JMX-1 rotary magazine.

The magazine fits flush with the underside of the stock.

Ruger specifies a 9-round capacity for the factory JMX-1 magazine.

Consequently, magazine type and capacity provide important distinctions from .22 LR American Rimfire models, which use a different BX-series magazine system.

Nine-Round Capacity

Model 8393 has a published 9-round capacity.

This capacity corresponds with the supplied JMX-1 rotary magazine.

Furthermore, Ruger states that .17 HMR and .22 Magnum American Rimfire models can also accept the larger BX-15 Magnum magazine.

For the factory specification table, however, the correct supplied-magazine reference is nine rounds.

Extended Magazine Release

The rifle incorporates an extended magazine release.

Ruger designed this control to allow straightforward removal of the flush-mounted rotary magazine.

The release is positioned immediately around the magazine area.

Therefore, it provides another recognizable external characteristic of the American Rimfire action and stock assembly.

Sling Swivel Studs

Ruger includes sling swivel studs as part of the factory configuration.

The rear stud also plays a role in retaining the interchangeable stock module.

Removing that stud allows the rear stock module to be changed.

Consequently, the sling-swivel arrangement serves both a conventional attachment role and a function within Ruger’s modular stock design.

Ruger American Rimfire Key Specifications

• Manufacturer: Sturm, Ruger & Co.
• Brand: Ruger
• Model family: American Rimfire
• Model number: 8393
• UPC: 736676083930
• Action: Bolt action
• Caliber: .17 HMR
• Barrel length: 16.10 inches
• Barrel profile: 0.720-inch predator barrel
• Barrel construction: Cold hammer forged
• Muzzle: Threaded
• Thread pattern: 1/2×28
• Factory muzzle component: Thread protector
• Twist: 1:9 RH
• Grooves: 6
• Material: Alloy steel
• Finish: Matte blued
• Stock: Synthetic
• Stock color: Black
• Stock system: Interchangeable rear stock modules
• Factory stock module: Standard length, high comb
• Length of pull: 13.75 inches
• Trigger: Ruger Marksman Adjustable
• Trigger adjustment range: Approximately 3–5 lb
• Safety: Tang-mounted
• Bedding: Ruger Power Bedding
• Barrel bedding: Free floated through bedding system
• Bolt throw: 60 degrees
• Bolt release: Receiver mounted
• Front sight: None
• Rear sight: None
• Optics interface: Factory-installed one-piece Picatinny rail
• Magazine: JMX-1 rotary magazine
• Factory capacity: 9 rounds
• Magazine release: Extended
• Additional magazine compatibility: BX-15 Magnum
• Overall length: 35 inches
• Published weight: 5.3 lb
• Additional equipment: Sling swivel studs

American Rimfire Receiver Design

The receiver forms the central structure of the Ruger American Rimfire.

First, the bolt operates through a compact rimfire action.

Next, the 60-degree bolt throw provides the action’s short rotational movement.

Furthermore, the receiver-mounted release allows bolt removal without requiring a trigger pull.

Together, these features create a recognizable action architecture within Ruger’s rimfire lineup.

Power Bedding and Receiver Interface

Ruger’s Power Bedding system uses integral bedding blocks to position the receiver consistently in the stock.

The design also supports the free-floating barrel arrangement.

Furthermore, the system is integrated into the factory stock architecture.

Consequently, Power Bedding represents more than a cosmetic feature; it is a core structural element of the American Rimfire design.

.17 HMR and .22 WMR Magazine System

Ruger groups .17 HMR and .22 Magnum American Rimfire configurations together for magazine compatibility.

Both use the flush-mounted JMX-1 9-round rotary magazine.

They can also accept Ruger’s BX-15 Magnum magazine.

By comparison, .22 LR American Rimfire models use BX-1 and related 10/22-pattern magazines.

Therefore, magazine architecture is one useful way to distinguish magnum-rimfire models from .22 LR versions.

16.1-Inch and 18-Inch American Rimfire Differences

The American Rimfire family contains several barrel lengths.

Model 8393 uses the shorter 16.10-inch predator barrel.

Other .17 HMR configurations have appeared with 18-inch barrels, including Target and earlier threaded models.

Consequently, barrel length should always accompany the model name when creating separate product or specification pages.

Standard and Target Model Differences

Ruger has produced both Standard and Target versions of the American Rimfire.

Target configurations commonly feature heavier target barrels and different stocks, including laminate furniture on certain models.

Model 8393 instead combines its 16.10-inch predator barrel with a black synthetic modular stock.

Therefore, Model 8393 should not be described as the American Rimfire Target unless the actual product is a separate Target SKU.

Black Synthetic and Other Stock Variants

The American Rimfire family has appeared with several stock and finish combinations.

These include black synthetic, laminate, stainless and various distributor-specific exterior treatments.

The black synthetic stock is one of the defining cosmetic characteristics of Model 8393.

However, model number remains a more precise identifier than stock color alone.

Model 8393 Identification

The exact configuration discussed on this page is:

Ruger Model 8393

with UPC:

736676083930

Ruger’s current specification sheet identifies this model with:

• .17 HMR chambering
• 16.10-inch barrel
• Black synthetic stock
• 9-round capacity
• 35-inch overall length
• Matte-blued finish
• 1/2×28 threaded muzzle

Therefore, Model 8393 and its UPC provide the strongest commercial identifiers for this configuration.

Ruger American Rimfire Platform Background

Ruger introduced the American Rimfire family in 2013.

The platform was designed around a bolt-action rimfire system incorporating Ruger’s rotary-magazine architecture, Power Bedding system and Marksman Adjustable trigger.

The family subsequently expanded into multiple barrel, stock and caliber configurations.

For official manufacturer specifications for this exact model, see the Ruger Model 8393 specification page.

For broader manufacturer information about the platform, see the Ruger American Rimfire overview.

.17 HMR American Rimfire Background

The American Rimfire family includes .17 HMR, .22 WMR and .22 LR configurations.

The .17 HMR and .22 WMR versions use Ruger’s magnum-rimfire magazine architecture.

Furthermore, multiple .17 HMR variants have appeared with different barrel lengths, stock styles and finishes.

Therefore, the full model number provides the best method for identifying a specific factory configuration.

Identification Notes

Several characteristics can help identify the Ruger American Rimfire .17 HMR 16.1-Inch.

First, confirm the .17 HMR caliber marking.

Next, verify the short 16.10-inch predator barrel and 1/2×28 threaded muzzle.

The black synthetic stock and matte-blued finish provide additional visual clues.

Furthermore, Model 8393 has no factory iron sights and instead includes a one-piece Picatinny rail.

The nine-round JMX-1 rotary magazine, 60-degree bolt throw and high-comb stock module provide additional identifying details.

Finally, verify Model 8393 or UPC 736676083930 when exact commercial identification is required.

Ruger American Rimfire .17 HMR Technical Summary

In summary, the Ruger American Rimfire .17 HMR 16.1-Inch is a compact bolt-action rimfire configuration identified by Ruger as Model 8393.

Its defining specifications include a 16.10-inch cold-hammer-forged 0.720-inch predator barrel, 1:9 RH twist and 1/2×28 threaded muzzle.

Additionally, the rifle uses a black synthetic modular stock, Power Bedding system, Marksman Adjustable trigger, tang safety and 60-degree bolt throw.

The factory-installed Picatinny rail and absence of conventional iron sights create an optics-oriented configuration.

Finally, the JMX-1 rotary magazine provides the factory nine-round capacity.

Taken together, these characteristics provide a clear technical overview of Ruger American Rimfire Model 8393.x