New Bulgarian Arsenal ambi thumb safety mech from Bulgaria Arsenal factory. These are very hard to get through customs. $125 Shipped Discreet friends and family PayPal . Location is Tulsa Oklahoma. Took one out of plastic to take pictures. They fit the AR-M1 . AR-M9F . SAM7SF . AR-M4 SF . SAM7K . SAM7R . SLR-101 . SAM5. and a few others.