Glock G37

The model 37 grip frame has three finger grooves, and has a small thumb rest on each side. The front of the frame has an accessory rail for attachment of a small flashlight or laser sight, if desired. While the weight of the two pistols is almost the same at roughly twenty-nine ounces, the new model 37 does feel smaller. With the slide dimensions the same, the model 37 fits a model 21 holster quite well. With the smaller grip size, the commercial model 37 magazine holds ten rounds of .45 GAP, with the magazines for law enforcement being of the same ten round capacity. The case length of the .45 GAP is roughly three quarters of an inch. The fired cases measured between .750 and .756 inches. The shorter case allows the grip frame to be smaller and still hold ten rounds.