Guide

Ruger 10/22 Threaded Barrel Combo (MPN 32001) with Viridian EON 3-9x40: Features, Specs, and Best Uses

Ruger 10/22 Threaded Barrel Combo (MPN 32001) with Viridian EON 3-9x40: Features, Specs, and Best Uses

Introduction

The Ruger 10/22 Semi-Auto .22 LR Rifle 16.4in Threaded Barrel 1/2x28 Satin Black 10rd with Viridian EON 3-9x40 Scope (MPN 32001, UPC 736676320011) takes one of the most proven rimfire platforms ever made and adds two things most shooters want immediately: a suppressor-ready muzzle and a factory-mounted, general-purpose optic.

For new shooters, it’s an approachable, low-recoil training rifle. For experienced shooters, it’s a ready-to-run rimfire host for modern accessories—especially a rimfire suppressor and a sling—without having to immediately replace core components. The included Viridian optic also makes it easier to stretch your effective range for small game and precision plinking compared to irons alone.

Key Features and Specifications

Below are the practical, “what you’ll actually care about” specs and features that define this MPN 32001 configuration.

Rifle platform: Ruger 10/22 reliability and parts ecosystem

  • Action/Type: Semi-automatic blowback rimfire (10/22 pattern)
  • Caliber: .22 LR
  • Magazine: 10-round Ruger rotary magazine (compact, flush-fitting profile; known for consistent feeding)
  • Safety: Cross-bolt manual safety at the trigger guard (simple, positive, and familiar)
  • Sights: Adjustable rear sight and gold bead front (fast acquisition at close range and useful as a backup if you remove the scope)

Ruger’s own manuals emphasize safe handling and the importance of treating the rifle as “safe” only when the bolt is open, the chamber is empty, and the magazine is removed—good baseline procedure for any range day and especially important when teaching new shooters. (ruger-docs.s3.amazonaws.com)

Barrel and muzzle: suppressor-ready out of the box

  • Barrel length: 16.4 inches (handy overall feel—excellent for field carry and bench work)
  • Muzzle threads: 1/2x28 (the dominant U.S. standard for rimfire suppressors and many .22 muzzle devices)
  • Finish/appearance: Satin black overall presentation (durable, low-glare look)

Why 1/2x28 matters: it maximizes compatibility. You’re not locked into odd thread pitches, and you can move a quality rimfire suppressor between multiple hosts that share the same threading.

Included optic: Viridian EON 3-9x40 (factory-installed)

This package’s biggest differentiator versus a base carbine is the included Viridian EON 3-9x40 scope.

Key scope specs (as provided by Ruger’s official store listing for the Viridian EON):

  • Magnification: 3–9x
  • Objective: 40 mm
  • Tube diameter: 1 inch (25.4 mm)
  • Adjustment value: 1/4 MOA
  • Parallax: preset at 100 yards
  • Construction: waterproof / shockproof / fog proof
  • Includes: 1" medium-height rings
  • Approx. length/weight: 12.32" / 11.81 oz
  • Warranty: Limited lifetime (Viridian)

These features are exactly what you want on a do-it-all rimfire: enough magnification for precision at distance, simple 1/4 MOA clicks, and a straightforward configuration that doesn’t overwhelm new shooters. (shopruger.com)

Common 10/22 control notes (real-world expectations)

If you’re coming from centerfire carbines that lock open automatically on an empty mag: a standard 10/22 typically does not lock open on the last round with OEM rotary mags; it uses a manual bolt lock. This isn’t a flaw—just a design characteristic to understand during training and reload drills.

Practical Applications

1) Plinking and informal range days

This configuration shines for steel, spinners, and paper at 25–100 yards.

  • 3x on the low end is quick enough for closer targets.
  • 9x on the top end helps you call shots and shoot smaller groups—especially when you’re testing ammo types.
  • The 10-round rotary magazine keeps the rifle’s profile sleek on a bench or bag.

2) Small-game hunting

For squirrels and rabbits (where legal), the 3–9x40 optic and handy barrel length make this a practical “walk-about” rifle.

  • Use quality hunting ammo appropriate to your local regulations and ethical hunting practices.
  • Confirm your zero distance based on your typical shots (many hunters choose a 50-yard zero for .22 LR, then confirm holds at 25/75).

3) Suppressor host for training and property use

The 16.4" threaded 1/2x28 barrel is the headline feature for many buyers.

  • With subsonic .22 LR, a rimfire suppressor can dramatically reduce perceived report.
  • Reduced noise often improves new-shooter confidence and helps you focus on fundamentals (trigger press, follow-through, and calling shots).

Reminder: suppressors are regulated items in the U.S.; follow all federal/state laws and use proper mounting practices (keep threads clean, confirm alignment, and re-check tightness periodically during long strings).

4) Rimfire skill-building that transfers to centerfire

A scoped 10/22 is one of the best tools for building repeatable rifle habits at low cost.

  • Position work: prone, kneeling, barricade practice
  • Optics workflow: finding targets, adjusting magnification, consistent cheek weld
  • Group analysis: learning what you versus the ammo is doing

Expert Analysis

The Ruger 10/22 Semi-Auto .22 LR Rifle 16.4in Threaded Barrel 1/2x28 Satin Black 10rd with Viridian EON 3-9x40 Scope (MPN 32001) is best understood as a “smart baseline” package: it covers the two most common early upgrades (threaded muzzle + optic) while keeping the underlying rifle true to the classic 10/22 formula.

What I like most about this configuration

  • Threaded muzzle done right: 1/2x28 is the compatibility king for rimfire.
  • Practical magnification range: 3–9x is still the sweet spot for general rimfire use.
  • Strong long-term support: the 10/22 platform’s parts and magazine ecosystem is huge.

Where to set expectations (so you’re not surprised)

  • Factory combo optics vary: The Viridian EON is positioned as a functional, entry-friendly optic. Ruger’s own listing highlights features like 1/4 MOA adjustments, 100-yard parallax, and multi-coated lenses. (shopruger.com) If you later get into precision rimfire disciplines (or want finer parallax control for close targets), upgrading the glass is common—but you don’t need to do it on day one.
  • Parallax preset: with a 100-yard preset, you may notice some parallax effects at very close distances. For most plinking and hunting use, it’s still entirely workable.

Recommended setup steps (high value, low effort)

  1. Confirm ring/base screws are properly torqued (especially after the first range trip).
  2. Zero at your real distance: 25 or 50 yards is the most useful starting point for .22 LR; then verify at 75 and 100.
  3. Pick ammo that cycles reliably: semi-auto rimfires can be ammo-sensitive; try a few proven loads and record groups.
  4. If running suppressed: keep the chamber/bolt face reasonably clean—rimfire suppressor use increases fouling.

Conclusion

If your goal is a dependable rimfire that’s immediately useful for the range, small-game hunting, and suppressor-ready training, the Ruger 10/22 Semi-Auto .22 LR Rifle 16.4in Threaded Barrel 1/2x28 Satin Black 10rd with Viridian EON 3-9x40 Scope (MPN 32001) is a well-chosen package.

You’re getting the classic 10/22 handling and magazine system, a handy 16.4" threaded barrel for modern muzzle compatibility, and a factory-installed 3–9x40 optic that makes it easier to realize the rifle’s practical accuracy potential right away. For most shooters, it’s the kind of combo that lets you spend your first months improving skills and enjoying the rifle—not troubleshooting a piecemeal build.

Sources

Ruger. "Viridian® 3-9x40 EON Rifle Scope w/ Rings." ShopRuger. (Accessed May 6, 2026). https://shopruger.com/Viridian-3-9x40-EON-Rifle-Scope-w_-Rings/productinfo/18486/

Sturm, Ruger & Co., Inc. "Instruction Manual for Ruger® 10/22® Autoloading Rifles." Ruger Docs (PDF). (Accessed May 6, 2026). https://ruger-docs.s3.amazonaws.com/_manuals/Ruger_1022.pdf