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Selecting the right suppressor is about more than just sound or flash reduction—it’s about caliber compatibility, pressure ratings, and firing schedules. Using a suppressor outside of its approved limits can result in poor performance, excessive wear, or catastrophic failure, which are all things that you do not want to deal with.

This guide from our team at Next Level Armament breaks down the official caliber compatibility and full-auto ratings for the NLS, OSCAR, and EMINENT suppressor families, based on our caliber chart. Whether you’re running rimfire, intermediate rifle calibers, or larger bore cartridges, this article helps you choose the correct suppressor with confidence.

Suppressor Models Covered

The following suppressor families and variants are included in this compatibility guide:

NLS Series

• NLS22 VARMINT

• NLS 556K Predator

• NLS 30K Predator

• NLS 36K Predator

An ideal option for hunting and lightweight rifle setups, the NLS Predator models emphasize portability with K-length configurations.

OSCAR Series

• OSCAR 556 / 556K

• OSCAR 30 / 30K

• OSCAR 36 / 36K

The OSCAR lineup offers expanded caliber coverage and improved durability, making it a strong choice for shooters who want flexibility across multiple firearms.

EMINENT Series

• EMINENT 556 / 556K

• EMINENT 30 / 30K

• EMINENT 36 / 36K

The EMINENT suppressors are built for higher-pressure cartridges and more demanding firing schedules, including full-auto use on supported calibers.

Caliber Compatibility Overview

Rimfire & Small Calibers

The following calibers are approved across all suppressor models listed:

• .17 HMR

• .17 WSM

• .22 LR

• .22 Magnum

• 5.7×28

These calibers are well suited for training, varmint hunting, and recreational shooting, making them compatible even with smaller suppressors like the NLS22 VARMINT.

Varmint & Intermediate Rifle Calibers

• .22-250
  
  Not approved for NLS22, but approved across OSCAR, EMINENT, and Predator models.

• .223 / 5.56 NATO
  
  Approved for all suppressors except the NLS22 VARMINT.

Shooters running AR-15 platforms should look to the OSCAR 556, EMINENT 556, or NLS 556K Predator for proper compatibility.

Mid-Caliber & Large Rifle Cartridges

The following calibers require larger bore suppressors and are not compatible with 5.56-only or rimfire models:

• 6 ARC

• 6.5 Grendel

• 6.5 Creedmoor

• .270 Winchester

• .300 Blackout

• .308 Winchester

• .300 Winchester Magnum

These calibers are approved for OSCAR 30/36 and EMINENT 30/36 models, as well as applicable NLS Predator suppressors where indicated.

Large Bore & Specialty Calibers

Certain calibers require the largest suppressor bore size available:

• .338 ARC

• 9mm

• .350 Legend

These calibers are only approved for OSCAR 36 / 36K and EMINENT 36 / 36K, making the 36-caliber suppressors the most versatile option for shooters running both rifle and pistol-caliber platforms (which means you could run a suppressor on your everyday carry).

Full-Auto Rating Explained

Suppressor longevity is heavily influenced by firing schedule. The chart includes official full-auto ratings for each suppressor family:

Full-Auto Ratings Legend

• N – No
  
  Not rated for full-auto fire

• L – Yes, but Limited
  
  Approved for limited full-auto use

• Y – Yes
  
  Fully rated for full-auto use

Full-Auto Capability by Series

• NLS22 VARMINT – Not rated for full-auto

• NLS Predator Series – Limited full-auto use

• OSCAR Series – Limited to full-auto depending on caliber

• EMINENT Series – Fully rated for full-auto on supported calibers

For high-volume or duty use, EMINENT suppressors provide the highest margin of safety and durability.

Understanding the Caliber Chart

CALIBER CHART – NOT ALL INCLUSIVE

• O – Approved

• X – Not Approved

Full-Auto Rating

• N – No

• L – Yes, but Limited

• Y – Yes

Always verify barrel length requirements and firing schedules before use.

How to Choose the Right Suppressor

When selecting a suppressor from the NLS, OSCAR, or EMINENT lineup, consider:

• Your largest caliber firearm

• Whether you need full-auto capability

• Desired balance of size vs suppression

• Future firearm compatibility

Choosing a suppressor rated for larger calibers than you currently own can provide long-term flexibility and value.

Final Thoughts

This suppressor compatibility guide provides a clear breakdown of approved calibers and firing ratings across the NLS, OSCAR, and EMINENT suppressor families. After you get your stamp, matching the correct suppressor to your firearm ensures safe operation, optimal suppression, and maximum service life.

Always follow manufacturer specifications when purchasing a suppressor.