Yes.
I did not kep it.
On my HW100 it was not bad but the original HW mod out performed it.
On rimfire, the crud produced by rimmie powder just made cleaning a complete barsteward.
Getting the baffles out was a pig, they are not very heavy guage and could become mishapen and applying oil or lube on re-assembly to prevent or reduce further jamming is a wise idea.
Even better idea is an ultrasonic bath to do the cleaning for you as it took forever with a tooth brush to do the baffles (I bought 2 of the beggars).
Either that, or you use solvents like brake fluid etc.
On air, there are much better option in respect of sound reduction and on rimmies, if cheap but effective is your criteria, SAK takes some beating.
I returned mine to the shop from whence they came.
In a battle of wits I refuse to engage with an unarmed person.
To one shot one kill, you need to seek the S. Kill only comes from Skill
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except lead. 
