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#22
22nd August 2011
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The famous Sterling submachine gun was born in around 1942 as "Patchettmachine carbine" - a prototype submachine gun, developed by George W.Patchett and originally produced by Sterling Engineering Co in England. Several prototypes were built before the end of the war, and the Sterling-Patchett submachine gun participated in extensive trials, held in UK between 1945 and 1953, when it was finally announced as a winner of trials, and adopted as"9mm Sterling submachine gun L2A1" (factory designation was"Patchett Mk.1"). Sterling submachine guns were produced for British armed forces by Sterling company and Royal Ordnance Arsenalin Fazakerly, England; Long Branch Arsenal in Canada made a slightly modified Sterling under license for Canadian army as C1. In a slightly modified form,known in British service as L2A3 submachine gun or as "Sterling submachine gun, Mark 4" or Sterling Mk.4 in short, it served with British army until early 1990s, when it was finally replaced by troublesome L85A1 assault rifle. Nearly 400 000 of Sterling submachine guns were produced until late 1980s. In 1967, British army adopted the L34A1 /Sterling Mk.5 silenced submachine gun, which is apparently still in limited use with certain special operations elements in British army.
Sterling submachine guns also were widely sold for export, more than 70 countries had purchased various quantities of Sterling submachine guns. It must be noted that Sterling submachine guns were rather popular among British troops, because of relatively compact size, adequate firepower and acuracy andgood reliability. L2A3 /Sterling Mk.4 submachine gun is blowback operated, selective fired weapons that fires from open bolt. The fire mode selector / manual safety lever is located on the left side of trigger unit, above the grip panel. Tubular receiver, which also serves as a barrel jacket at the front, contains a cylindrical bolt with fixed firing pin. Bolt body has several spiral grooves on its outside surface which collect the dust and fouling from inside the receiver, and thus greatly improve reliability of the gun under field conditions. Feeding is from the left side;magazines are inserted horizontally, and ejection is to the right. Magazines are of slightly curved shape for improved feeding reliability. Buttstock is made from stamped steel and folds down and below the receiver to save space. Standard sights include protected front blade and flip-up rear aperture sight, marked for100 and 200 yards range, and also protected from sides by sturdy"ears". Special "high power, submachine-gun only" ammunition was procured by British army for Sterling submachine guns. This ammunition was absolutely safe in Sterling submachine guns, but can cause extensive wear to many 9mm pistols designed for commercial 9x19 ammunition. L34A1 /Sterling Mk.5 silenced submachine gun differed in the barrel section, as its barrel has some 72 small holes used to vent powder gases into the rear expansion chamber of the integral silencer. This was necessary to decrease the muzzle velocity of the bullet so it would be below the speed of sound. Like its predecessor, the STEN Mk.IIS, the silenced Sterling gun was intended to be fired mostly in semi-automatic mode; the full-automatic fire was for emergency purposes only. 
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#28
22nd August 2011
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The Glock family of pistols, once started by famous Glock 17 pistol, was developed by Austrian company Glock Gmbh., previously known for quality knives and entrenching tools. The Glock 17 pistol first appeared at the Austrian Army trials, won it and was adopted by Austrai Army and Police in the early 1980s under the designation of P-80. Since then, the Glock 17 and its descentants become very popular military and law enforcement firearms, being exported in more than 50 countries. Currently, Glocks are chambered in all major pistol calibers, namely 9x17mm Short (.380ACP), 9x19mm Luger, .357SIG, .40SW, 10mm auto and .45ACP. Also, Glocks available in full-size service models, semi-compact models, compact models for concealed/backup carry, and in longslide competition models. Training versions, firing non-lethal practice ammo, also available. Training versions are distinguished from "live" ones by frame colour - blue frame for guns that fire non-lethal ammunition and red frame - for non-firing guns.
All Glocks (except for ones chambered in 9x17 - .380ACP) are recoil operated, locked breech pistols. Glocks feature Browning-type linkless locking system with barrel interlocking with slide via ejection port. All Glocks feature patented "Safe action" striker-fired trigger mechanism. After the each cycle of the slide the striker is set to half-cock position and is safely blocked by internal safety. When shooter pulls the trigger, he disengades the trigger safety first, then cocks the striker to the full-cock and then fires the gun. This results in constant trigger pull (ajustable from 2 to 5.5 kg) and, unlike the traditional DA or DAO pistols, unavailability of the "second strike" option in case of the misfire. All Glocks has no external controls except the trigger and the slide stop (the only different is Glock 18, which has slide mounted fire mode selector). The .380ACP / 9x17mm Short chambered Glocks (models 25 and 28) differs from the rest of the Glock family by operating by simple blowback principle. These pistols targeted for civilian markets where ownership of the firearms chambered in "military" calibers is prohibited, or for those shooters who can't withstand more severe recoil of the "bigger" calibers. All Glocks feature polymer frame, steel slides made by precision moulding process and had Tenifer heat-threatment to increase rust and wear risistance. early Glocks had plain grips with slight serrations. Modern variants has finger grooves on the front strap of the grip, and ambidextrous thumb rests. Also, modern versions featured underbarrel acessory rails. Barrels has hexagonal rifling in all calibers. Both front and rear sights are dovetailed and usually had white or luminous inserts. Ajustable sights are available for competition models. Almost all models had modifications with factory-ported barrels. These models are marked with suffix "C" after the model number, i.e. Glock 17C. The Glock 17 (and only model 17) could be modified with "amphibious kit" that allows underwater firing (in wery shallow depths, thought). Basically, the underwater shooting itself has wery little effect in real combat, since the effective range is extermely short. The real purpose of that feature is to show the strenght of the gun and to allow safe shoting in severe weather conditions, with possible water in the barrel (in many guns this may result in blown barrel). The select-fire version of the Glock, called Glock 18, available only in 9mm Luger and only for Military / Law enforcement sales. Glock 18 could fire single shots or three-shot bursts. Glock 18 may be equipped with 31-rounds extended magazines and after-market folding stocks. For security reasons, some parts of the Glock 18 ARE NOT interchangeable with Glock 17/19 pistols. The theoretical rate of fire in full-auto mode is 1200 rounds per minute. 9x19mm Glock family basic data (.40SW and .357SIG models has the same dimensions, but weight slightly more) GLOCK 17 GLOCK 18 (select-fire) GLOCK 19 GLOCK 26 Lenght, mm 186 186 174 160 Barrel lenght, mm 114 114 102 88 Weight empty, g 625 625 595 560 Capacity, rds 10, 17, 19, 31 10, 17, 19, 31 10, 15, 17 10, 12
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