MCX .300 — Quiet, Light and Mean

SIG MCX .300 Blackout assault rifle · July 27, 2026

Preview image of the build — Preview image submitted with the build

Stats

Entered by the submitter — not calculated by the site.

Ergonomics

58.9

Vertical recoil

Horizontal recoil

188

Weight (kg)

2.98

Notes

2.98 kg, the lightest build on the site, running subsonic-friendly .300 Blackout at 653 m/s through a PSR 762 suppressor. Deltapoint on top, carbon handguard, 58.9 ergonomics. Built to be heard as little as possible.

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