If its anything like my 3rd Gen 4506 it will have one of the best trigger resets you have ever felt. Love these SA/DA American made guns with a real cockable hammer. Just be aware of magazine and spare part availability - can be hard to get or at $$$$ ebay prices.
'Despite using a three-digit model number, both the Model 915 and the Model 910 are in fact
3rd Generation Smith & Wesson auto pistols, and were part of the
Value Series that incorporated several features to cut the costs associated with manufacturing. The first two digits reflect the caliber (9, 40, or 45). The 915 and 910 are both based on the
Smith & Wesson 5904 - the numeral
9 stands for "9mm" (the caliber), and the following digits
15 and
10 for the magazine capacity, respectively.
[1] Like the Model 5904, both the 915 and 910 utilized a carbon steel slide and an aluminum alloy frame.
In order to reduce production costs, both the Model 915 and Model 910 were made with only one safety/decocker lever (left side) as well as a matte finish with certain external machine operations omitted on the exterior of the pistol. The Model 915 was made with all-metal parts, while the follow-on Model 910 utilized additional economies including a plastic rear sight, recoil guide rod, and magazine release button, as well as additional omitted finish machine operations to further save on manufacturing expenses.
[1] The earlier Model 915 also has a lug on the barrel and a corresponding cut in the slide, while the later 910 omits the barrel lug by locking the barrel hood against the front of the slide ejection port. Both models have a reputation as reliable, robust service-type pistols.'