I've got an AWC Optima for my Pre-ban AR. Love it. Works great with regular .223s, about the same with .22 LR Hyper-Vels (Sound signature is about the same from the operators point of view) and with .22 LR Sub-sonics can you say "Hammer Strike, Target Impact".
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Schmit
GySgt, USMC(Ret)
NRA Life, Lodge 1201-UOSSS
"Si vis Pacem Para Bellum"