A.B. Biller Spearguns A.B. Biller Spearguns built in the usa and respected worldwide has proven itself as the foremost production speargun in today's market. the stainless steel trigger mechanism is unsurpassed in reliability and smooth action. The teak or padauk wood is quiet, accurate & neutrally buoyant. The Biller stainless steel professional guns are the choice of commercial divers all over the south east.