I've had 2 range sessions with the Mod 6 on a factory BCM 16".
First session was a direct comparison at dusk first with a standard A2 bird cage, then replacing it with Mod 6. The only difference I could tell was just a tad bit more flash with the Mod 6. No perceptible difference in muzzle rise or felt recoil.
Ammo was a Federal tactical 223 load.
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