I’m running into expected issues tuning a 10.5 556 for suppressed and unsuppressed reliability

Here’s what I found

All setups using geissele super 42 buffer and spring and dead air sandman S

Barrel is a 10.5 Rosco carbine gas

Fail zero in my experience always cycled faster but has erratic ejection



Fail zero H1 buffer

Unsuppressed slightly overgassed 1 o’clock ejection

Suppressed brass is smacking the deflector hard and going 12-1 o’clock


Failzero H2 buffer

Unsuppressed slightly overgassed with 2oclock ejection

Suppressed is still too overgassed smacking deflector

H2 with BCM BCG

unsuppressed 330-4 o’clock ejection, no malfunctions but doesn’t always lock back last round

Suppressed is 3 o’clock ejection and pretty much perfect



I’m going to try an H1 on the BCM but I believe it will be a bit overdone with the can


Suggestions? I don’t want adjustable gas blocks


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