how does the magazine on a p90 work
FN P90 The P90 uses a unique horizontally mounted feeding system—patented in the United States—that contributes to the weapon's compact profile and unusual appearance.[12] U.S. Patent 4,905,394 ("Top mounted longitudinal magazine") was awarded in 1990, naming René Predazzer as the sole inventor.[31] The detachable box magazine is mounted parallel to the P90's barrel, fitting flush with the top of the weapon's frame, and it contains 50 rounds of ammunition which lie in two rows facing left, offset 90° from the bore axis.[17] As the cartridges are pushed back by spring pressure and arrive at the rear end of the magazine, they are fed as a single row into a spiral feed ramp and rotated 90 degrees, aligning them with the chamber.[17] The magazine body is composed of polymer, and it is semi-transparent to allow the shooter to see the amount of ammunition remaining at any time.[17]
Glock In August 2017, Glock presented the "fifth generation" or "Gen5". The revisions centered on ergonomics and improving reliability. Many parts of fifth-generation Glock pistols cannot be interchanged with those of the previous generations. The two fifth-generation models announced were the Glock 17 and Glock 19, chambered for the 9×19 mm Parabellum. Some conspicuous changes on the fifth-generation models are: nDLC (Diamond-Like Carbon) surface finish for barrel and slide, new barrel rifling and a deeper rtecessed barrle crown, omission of the finger grooves on the grip, a reintroduction of a cutout on the bottom front of the grip, ambidextrous slide stop lever, and a flared magazine well. The locking block pin located above the trigger pin that was introduced in the third-generation is omitted. Many internal parts were less conspicuous revised.[39][40][41][42][43] "Gen 5" is rollmarked on the slide next to the model number to identify the fifth-generation pistols. The magazines were also revised for the fifth-generation models. The redesigned magazine floor plates feature a frontward protruding lip to offer grip for manual assisted extraction and the magazine follower became orange colored for easier visual identification.