MCX SPEAR-LT in 7.62x39

Published on July 13, 2024
Duration: 17:26

This review of the SIG MCX Spear-LT in 7.62x39mm highlights its piston-driven system, two-position gas block, and ambidextrous controls. The reviewer discusses magazine reliability, particularly with 7.62x39mm, and notes issues with soft-point ammunition feeding. Accuracy testing reveals MOA figures ranging from 2.28 to 5.24, with the reviewer attributing limitations to the caliber, barrel length, and ergonomics. Despite some drawbacks, the firearm is praised for its fun factor and effectiveness in close-to-medium range engagements.

Quick Summary

The SIG MCX Spear-LT in 7.62x39mm is a piston-driven rifle featuring a two-position adjustable gas block and ambidextrous controls. While it offers reliable function with proprietary 28-round magazines, soft-point ammunition can cause feeding issues. Accuracy testing showed group sizes between 2.28 and 5.24 MOA, with limitations noted for precision shooting beyond 50 yards.

Chapters

  1. 00:00Introduction to the MCX Spear-LT
  2. 00:18Overview of the MCX Spear-LT in 7.62x39mm
  3. 00:34Two-Position Gas System
  4. 01:06Factory Trigger Assessment
  5. 01:13Aftermarket Grip and Hand Stop
  6. 01:23Controls and Ambidextrous Features
  7. 02:02Bolt Catch and Bolt Release
  8. 02:13Personal Preference on Ambi Controls
  9. 03:05Accidental Magazine Release Concerns
  10. 04:04Appreciation for 7.62x39mm Platform
  11. 04:17Magazine Reliability Importance
  12. 04:4328-Round Magazine Capacity
  13. 05:05Reliability vs. Capacity Compromise
  14. 05:16Shooting Issues and Ammunition Types
  15. 05:44Soft Point Ammunition Feeding Problems
  16. 06:38Muzzle Flash and Flash Hider
  17. 07:04Shooting with a Suppressor
  18. 07:41Compact Package and Folding Stock
  19. 08:04Weight of the Setup
  20. 08:17Usage Scenarios: Shoot House and Competition
  21. 08:36Competition Experience (Moons Out Goons Out)
  22. 09:03Competition Misfeeds and Ammunition
  23. 10:00Limitations for Precision Work
  24. 10:31Performance in a Rifle Course
  25. 11:33VTAC Barrier Scrambler Competition
  26. 12:00Accuracy Testing Methodology
  27. 12:31Sterling 123gr FMJ Accuracy
  28. 12:48Idaho Ordnance 123gr SST Accuracy
  29. 13:06Steel Case Hunting Ammo Accuracy
  30. 13:24Bernal 125gr Soft Point Accuracy
  31. 13:40Bernal 123gr FMJ Accuracy
  32. 13:59Discussion on Accuracy Results
  33. 14:25Factors Affecting Accuracy
  34. 14:36Ergonomic Challenges for Accuracy
  35. 15:14Overall Thoughts on the MCX Spear-LT
  36. 15:32Strengths and Weaknesses
  37. 16:00Reliability and Maintenance
  38. 16:18Handiness and Gas Adjustment
  39. 16:21Fun Factor and Suppressor Use
  40. 16:37Recommendation and Price
  41. 16:5216-inch Version Availability
  42. 17:04Concluding Remarks

Frequently Asked Questions

What are the key features of the SIG MCX Spear-LT in 7.62x39mm?

The SIG MCX Spear-LT in 7.62x39mm features a piston-driven operating system, a two-position adjustable gas block for tuning performance, and ambidextrous controls. It also utilizes proprietary 28-round magazines designed for reliable feeding of the 7.62x39mm cartridge.

What are the accuracy capabilities of the SIG MCX Spear-LT in 7.62x39mm?

Accuracy testing with various 7.62x39mm ammunition showed group sizes ranging from 2.28 MOA to 5.24 MOA. The reviewer suggests that factors like the caliber, 7.4-inch barrel length, and ergonomics limit its precision shooting capabilities beyond approximately 50 yards.

Are there any ammunition-specific issues with the SIG MCX Spear-LT in 7.62x39mm?

Yes, soft-point ammunition in 7.62x39mm can cause feeding problems due to its large, soft lead surface impacting the feed ramp. Full Metal Jacket (FMJ) ammunition generally feeds reliably in this platform.

How does the SIG MCX Spear-LT perform with a suppressor?

While the MCX Spear-LT in 7.62x39mm produces significant muzzle flash and concussion, attaching a suppressor, such as the SIG SLX K-CAN, makes it considerably more pleasant to shoot. It does not make the firearm quiet but improves the overall shooting experience.

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