Hornbill silencers for those who are looking for a flexible one and can for either negative or positive 14mm threads. Available at RSOV.com for US$14.99 and may be the last update from them for now as they go on Holidays. Available in black or dark earth colours... "Hornbill +/-14mm threaded 190mm Flat Dark Earth aluminum silencer with 'troy' markings. Light-weight aluminum constructed silencer for airsoft guns comes with adatpor to fit both +/- 14mm threaded outer barrels."