Smith & Wesson Model 619 & 620
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The Smith & Wesson
Smith & Wesson
Smith & Wesson is the largest manufacturer of handguns in the United States. The corporate headquarters is in Springfield, Massachusetts. Founded in 1852, Smith & Wesson's pistols and revolvers have become standard issue to police and armed forces throughout the world...

 models 619 & 620 are 7 shot revolvers introduced by the company in 2005. The 619 has fixed rear sights while the 620 comes with adjustable rear sights and a different handgrip. They are very similar and often mistaken for members of the 686 family.

In actuality they are descendants of S&W's model 65 & 66. The 65 & 66 models were discontinued and the 619 & 620 filled their place as the next generation. They were updated to current S&W standards with the addition of a key lock safety as well as 7 round cylinders. The K-Frame
K-frame
In linear algebra, a branch of mathematics, a k-frame is an ordered set of k linearly independent vectors in a space; thus k ≤ n, where n is the dimension of the vector space, and if k = n an n-frame is precisely an ordered basis.If the vectors are orthogonal, or orthonormal,...

 of the 65 & 66 was replaced with the newer reinforced L-Frame.

620 vs 686P

These guns share many common traits but are easily distinguished by key differences. Both models are based on the Smith & Wesson L-Frame and are available in 4" barrels with 7 shot capacity. The 686 features a full-underlug barrel made of one piece where as the 620 sports a half-lug and two piece barrel
Barrel
A barrel or cask is a hollow cylindrical container, traditionally made of vertical wooden staves and bound by wooden or metal hoops. Traditionally, the barrel was a standard size of measure referring to a set capacity or weight of a given commodity. A small barrel is called a keg.For example, a...

. The 620 weighs in at 37.9oz, just a hair lighter than the 686's 38oz. The lighter model also shaves 1/8" off of the 686's 9" overall length.

The Model 619 & 620 product pages and specification documents can no longer be found on the Smith & Wesson website; these models appear to have been discontinued at this point.
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