[ < Back to magnifiers ]
MagnifiersValue Tier

Primary Arms

Primary Arms SLx 5x Magnifier

Budget 5x magnifier that opens up 400-500 yard capability at a price no other brand matches.

No image available
Check Best Price
View at Optics Planet
Add to Build

Quick Specs

Price
$249
Weight
N/A
Brand
Primary Arms
Category
magnifier

Features

  • •5x magnification
  • •Flip-to-side mount included
  • •Adjustable diopter
  • •Multi-coated glass

Capability Boosts

Long Range+3
Mobility+-2

Recommended For

Range Training+3
Outdoor Defense+3

Compatibility Tags

interface: picatinny-topsuitable-for: standardsuitable-for: longoptic-type: magnifier

Overview

The Primary Arms SLx 5x is the entry point for 5x magnification, extending a carbine's effective range significantly beyond what a 3x magnifier allows. At this price, it's the default recommendation for any shooter who knows they need 5x but can't justify $700 for an EOTech G45.

Key Features

  • ✓5x magnification for targets from 300-500 yards
  • ✓Flip-to-side mount included
  • ✓Adjustable diopter for individual focus
  • ✓Multi-coated glass for light transmission

Pros

  • +Only 5x magnifier available under $300
  • +Mount included — complete system out of the box
  • +Extends effective range well beyond 3x alternatives

Cons

  • −Glass edge sharpness falls behind premium 5x options
  • −Heavier and longer than 3x magnifiers

Detailed Specifications

Magnification
5x
Mount Type
Flip-to-Side (included)

Compatible Platforms

+54 more

Custom

Custom AR-15 (Build From Scratch)

Palmetto State Armory

PSA PA-15 16" Carbine

Smith & Wesson

Smith & Wesson M&P15 Sport II

Diamondback Firearms

Diamondback DB15 16"

Aero Precision

Aero Precision M4E1 Complete Rifle 16"

Bravo Company Manufacturing

BCM RECCE-16 MCMR

Pairs Well With

Top matches

Palmetto State Armory

PSA PA-15 16" Carbine

1 shared compatibility tags

Great

Smith & Wesson

Smith & Wesson M&P15 Sport II

1 shared compatibility tags

Great

Diamondback Firearms

Diamondback DB15 16"

1 shared compatibility tags

Great

Sig Sauer

Sig Sauer M400 Tread

1 shared compatibility tags

Great

Palmetto State Armory

PSA Sabre

1 shared compatibility tags

Great

CAA

CAA MCK for Glock

1 shared compatibility tags

Great

Similar Products

Primary Arms

Primary Arms SLx 3x Magnifier Gen II

$149

Holosun

Holosun HM3X Magnifier

$219

Vortex

Vortex VMX-3T Magnifier

$199

EOTech

EOTech G33 3X Magnifier

$599

Related Guides & Articles

Guides

AR-15 Optic Selection 2026: Red Dot vs LPVO vs Prism vs Magnifier Compared

gear•8 min read

Best LPVO 2026: Top 10 Low Power Variable Optics Ranked (Vortex, Trijicon, Primary Arms)

gear•5 min read

Best AR-15 Magnifier 2026: Top Red Dot Magnifier Picks Ranked by Budget

gear•10 min read

Articles

Primary Arms PLx Compact LPVO: 1.5-12x36 Precision Scope with RDB Reticle

news•Jan 26, 2026

Ambient Arms EXO Suppressor: Revolutionary Cooling Tech at SHOT Show 2026

news•Jan 22, 2026
Browse all guides →Browse all articles →

Build Your Custom Configuration

Add the Primary Arms SLx 5x Magnifier to your build and see how it enhances your platform.

Start Building