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StarFire is a wide-area differential GPS developed by John Deere's NavCom and precision farming groups. StarFire broadcasts additional "correction information" over satellite L-band frequencies around the world, allowing a StarFire-equipped receiver to produce position measurements accurate to well under one meter, with typical accuracy over a 24-hour period being under 4.5 cm. StarFire is ...
The lack of a projecting rim makes rimless cases feed very smoothly from box magazines, drum magazines, and belts. Rimless cases are not well suited to break-open and revolver actions, though in break-action firearms they can be used with appropriate modifications, such as a spring-loaded extractor/ejector or, in a revolver, a half or full moon ...
The Star Firestar is a series of single-action semi-automatic pistol consisting of four models that received the 1991 Handgun of the Year Award from Guns & Ammo magazine. The Firestar was available in 9 mm Para (M-43), .40 S&W (M-40), and .45 ACP (M-45) calibers, all having a single-stack magazine. A double-stack 9mm version (M-243) was also ...
In this case they tested a wide variety of ammunition available in .38 and .357 magnum using a single revolver modified to have a long barrel (so that they could cut it down an inch at a time, as they did with the barrel length tests) and also modified to allow them to change the gap using a set of shims. In this way they were able to test with ...
Magpul has been granted a patent [47] for a STANAG-compatible casket magazine, [48] and such a magazine was also debuted by SureFire in December 2010, and is now sold as the MAG5-60 and MAG5-100 high capacity magazine (HCM) in 60 and 100 round capacities, respectively, in 5.56mm for AR-15 compatible with M4/M16/AR-15 variants and other firearms ...
The barrel and mandrel are rotated and hammered by power hammers, which forms the inside of the barrel. This is the fastest and often cheapest method of making a barrel, but the equipment is expensive. Hammer-forged barrels are generally not capable of the accuracy attainable with the first two methods mentioned.
A drum magazine is a type of high-capacity magazine for firearms. [1] Cylindrical in shape (similar to a drum), drum magazines store rounds in a spiral around the center of the magazine, facing the direction of the barrel. Drum magazines are contrasted with more common box-type magazines, which have a lower capacity and store rounds flat. [1]
It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel. The feed ramp may be part of the magazine ( AR-7 ), part of the receiver or frame ( Mauser C96 ), part of the barrel ( H&K USP ) or part of the barrel nut/locking lugs ( AR-15 ).