5x SLx Microprism Primary Arms Review

Published on August 18, 2023
Duration: 21:55

This guide details the installation and initial zeroing of the Primary Arms SLx 5x Microprism, emphasizing proper mounting techniques for durability. The reviewer from Brass Facts, with high authority based on practical testing, highlights potential zero retention issues and recommends specific aftermarket mounts like ADM for serious use. Key considerations include achieving correct eye relief and understanding the optic's limitations during impact tests.

Quick Summary

The Primary Arms SLx 5x Microprism review highlights potential durability concerns, including zero loss after transport and impact tests. The reviewer criticizes the 6061 aluminum piggyback mount shroud as flimsy. For improved reliability, an aftermarket mount like the ADM B2 Cantilever Mini ACOG is recommended. The ACSS Aurora reticle offers useful BDC and ranging features.

Chapters

  1. 00:00Introduction to Prism Optics
  2. 00:32Initial Reliability Issues
  3. 01:32Piggyback Mount Critique
  4. 03:59SLx Microprism Line Comparison
  5. 04:44Brightness and Battery Life
  6. 05:35Mounting and Durability Trade-offs
  7. 06:46Eye Relief and Eye Box
  8. 09:06Reticle Analysis: ACSS Aurora
  9. 11:35The 'Eye Feel' and Use Cases

Frequently Asked Questions

What are the main durability concerns with the Primary Arms SLx 5x Microprism?

The Primary Arms SLx 5x Microprism has shown potential zero retention issues, losing zero during transport and after impact tests. The reviewer also criticized the 6061 aluminum piggyback mount shroud as flimsy and prone to shifting zero under stress.

What are the advantages of the ACSS Aurora reticle in the SLx 5x Microprism?

The ACSS Aurora reticle, available in Yards or Mil, offers practical features like Bullet Drop Compensation (BDC), wind holds for 5 and 10 mph, and auto-ranging capabilities, which are beneficial for accurate shooting at various distances.

What is the recommended mounting solution for the Primary Arms SLx 5x Microprism?

While the optic comes with spacers, the reviewer suggests that for maximum durability and zero retention, especially after impacts, a more robust aftermarket mount like the American Defense Manufacturing (ADM) B2 Cantilever Mini ACOG Mount is recommended over standard cantilever options.

How does the Primary Arms SLx 5x Microprism compare to competitors like ACOG or Vortex?

The SLx 5x Microprism is lighter than many ACOGs and offers features like daylight bright illumination and shake-awake. However, ACOGs may provide a more immersive image. The Vortex Spitfire HD Gen II 5x is presented as a direct market competitor.

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