LaRue MRGG-S (OBR / PredatOBR AR10) to 1,000yds: Practical Accuracy

Published on September 25, 2025
Duration: 29:35

This video provides a practical accuracy test of the LaRue MRGG-S (OBR/PredatOBR AR10) at 1,000 yards. It details the rifle's performance, including its accuracy potential and the process of adjusting its gas system for optimal reliability. The discussion highlights the rifle's pedigree from military contract trials and its suitability for precision shooting applications.

Quick Summary

The LaRue MRGG-S rifle demonstrated excellent accuracy, achieving a 0.55-inch five-shot group during zeroing, indicating sub-MOA potential. Proper gas system adjustment is crucial for its reliability, ensuring the bolt carrier cycles correctly, especially with fully loaded magazines.

Chapters

  1. 00:01:00Introduction & Sponsor
  2. 01:13:00Range Time & Initial Impressions
  3. 01:47:00Shooting at 150 Yards
  4. 02:19:00Shooting at 200 Yards
  5. 02:42:00Shooting at 250 Yards
  6. 03:04:00Shooting at 300 Yards
  7. 03:12:00Shooting at 350 Yards
  8. 03:29:00Shooting at 400 Yards
  9. 03:46:00Shooting at 450 Yards
  10. 04:05:00Dialing for 500 Yards
  11. 04:25:00Shooting at 575 Yards
  12. 04:41:00Shooting at Turkey Target
  13. 05:16:00Shooting at 800 Yards
  14. 05:40:00Malfunction & Gas Adjustment Discussion
  15. 05:59:00Shooting at 900 Yards
  16. 06:26:00Shooting at 1000 Yards
  17. 06:44:00Post-Shoot Reliability Check
  18. 07:03:00Debrief: MRGG-S Pedigree
  19. 08:06:00LaRue Brand Legacy
  20. 08:51:00Quick Detach Handguards
  21. 09:06:00Classic LaRue Marketing Video
  22. 10:04:00Furniture Criticisms
  23. 10:22:00Rifle Aesthetics & Rail System
  24. 10:32:00LaRue Collapsible Stock
  25. 11:15:00Rifle Performance & Accuracy
  26. 11:34:00Group Size Data
  27. 12:04:00Phenomenal Product & Availability
  28. 12:29:009-Hole Reviews Support
  29. 13:29:00Debrief: Rifle Performance & Hype
  30. 14:02:00Gas Setting Misconception
  31. 14:22:00First Time Shooting & Gas Adjustment
  32. 15:23:00Ammunition Lot Variability
  33. 16:03:00User Serviceability & Reliability Post-Adjustment
  34. 16:34:00Rifle Performance Summary
  35. 16:53:00MRG Pedigree: OBR & Predator
  36. 17:26:00LaRue's Legacy in Precision ARs
  37. 18:11:00Rail Interface: Quick Detach System
  38. 19:12:00Comparison to H&K G28 QD System
  39. 19:53:00Precision vs. Reliability Balance
  40. 20:00:00Precision Expectations for AR10s
  41. 20:39:00Military Employment: Reliability vs. Precision
  42. 21:04:001 MOA Capable on Extended Strings
  43. 21:54:00Feature Sets & Price Justification
  44. 22:08:00MRGG Program Explained
  45. 22:55:00MRGG-S Submission Details
  46. 23:21:00Competitors in MRGG Trials
  47. 23:54:00Shift to 6.5 Creedmoor
  48. 24:42:00Linkage to PRS and Sporting World
  49. 25:19:00Gas System Adjustment as Military Development?
  50. 25:43:00Civilian Development of Free Float Systems
  51. 26:43:00Ruggedizing for Employment
  52. 27:07:00Large Frame AR Testing Overview
  53. 27:30:00Barrel Life & Chrome Lining
  54. 28:14:00Friendly Competition
  55. 28:24:00Wrap Up & Call to Action

Frequently Asked Questions

What is the accuracy potential of the LaRue MRGG-S rifle?

The LaRue MRGG-S demonstrated impressive accuracy, printing a 0.55-inch five-shot group during zeroing. This suggests it is capable of sub-MOA performance, likely achieving groups of an inch or less with 10 shots under optimal conditions.

How do you adjust the gas system on an AR-platform rifle like the LaRue MRGG-S?

To adjust the gas system, first turn it off. Then, load a single round, and slowly open the gas system until the bolt carrier group locks to the rear on an empty magazine. This setting typically ensures sufficient gas for reliable cycling.

What are the key features of the LaRue MRGG-S rifle?

The LaRue MRGG-S features a quick-detach (QD) handguard system for easy barrel changes and accessory mounting. It's designed for precision long-range shooting, often chambered in calibers like 6.5 Creedmoor, and stems from military contract trials.

Why is adjusting the gas system important for AR-platform rifles?

Proper gas system adjustment is critical for reliability. Undergassing can cause malfunctions, especially with fully loaded magazines or ammunition with inconsistent performance. Correctly tuning the gas ensures the bolt carrier cycles reliably and locks to the rear after the last round.

What is the significance of the MRGG-S designation?

MRGG-S stands for Mid-Range Gas Gun Sniper. This designation indicates a military program focused on developing precision semi-automatic rifles capable of engaging targets at extended ranges, often utilizing higher-performance cartridges than standard .308 Winchester.

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