FRT in a 300 AAC Blackout : The MOTH300 - Part 1/2

Published on March 2, 2025
Duration: 10:52

This guide covers the initial range testing and tuning of a custom MOTH300 build in .300 AAC Blackout, featuring an FRT trigger. The host, an experienced firearm builder, details component selection, addresses cycling issues with subsonic vs. supersonic ammunition, and demonstrates accuracy and rapid-fire capabilities. The video highlights the need for gas system tuning for optimal performance with different ammunition types.

Quick Summary

The MOTH300 custom build in .300 AAC Blackout, featuring an FRT trigger, experienced cycling failures with subsonic ammo but ran reliably with Winchester 125gr supers, albeit gassily. Expert handling is required to manage recoil during rapid fire.

Chapters

  1. 00:00Introduction to MOTH300 Build
  2. 01:44Range Setup and Ammo Selection
  3. 02:44Build Component Breakdown
  4. 03:13Cycling Issues: Subsonics vs. Supersonics
  5. 04:37Accuracy Testing
  6. 05:55FRT Rapid Fire and Bill Drills
  7. 09:47Full Magazine Dump and Conclusion

Frequently Asked Questions

What are the key components of the MOTH300 custom rifle build?

The MOTH300 features a Radian ADAC lower, BCM upper, Sharps Rifle Company BCG, Law Tactical Folder, SB Tactical SBA3 brace, EOTech EXPS3 optic with G33 magnifier on a Unity Tactical Riser, and a Dead Air Sandman-X suppressor. Weapon Works provided the Cerakote finish.

What cycling issues were encountered with the MOTH300 build?

During initial testing, the MOTH300 experienced failures to feed with Hornady Subsonic 190 grain ammunition. Switching to Winchester 125 grain supersonic ammunition resolved the cycling problems, though it resulted in a "very gassy" operation.

How does the Forced Reset Trigger (FRT) perform on the MOTH300?

The FRT trigger allows for extremely rapid firing. However, the host emphasizes the need for strong shouldering and recoil control to manage the significant muzzle rise and felt recoil of the .300 AAC Blackout round during rapid-fire drills.

What accuracy was observed during the range test?

Accuracy testing was conducted at 25 yards. The video shows shot groups on an Action Target paper silhouette, comparing cold barrel versus hot barrel performance, with a slight increase in dispersion noted as the barrel heated up.

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