Smith & Wesson 6906, Ambi Safety Assembly, Used, Excellent $100.00 Excellent condition, used stainless steel ambi safety assembly for a Smith and Wesson 6906. In stock Smith & Wesson 6906, Ambi Safety Assembly, Used, Excellent quantity Add to cart Category: Smith & Wesson Related products Smith & Wesson K frame thumb piece nut, blue $10.00 Smith & Wesson M&P 9mm .40/.357 Recoil Spring 16lb. $14.97