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Bill Wylde of Greenup, Illinois, compared the two cartridges and changed the chamber of the rifle's barrel to a specification he called the .223 Wylde chamber. The chamber is made with the external dimensions and leade angle found in the military 5.56×45mm NATO cartridge and the 0.2240 in (5.69 mm) freebore diameter found in the civilian SAAMI.
A longer barrel typically yields a greater muzzle velocity, while a shorter barrel yields a lower one. The first AR-15 rifles used a barrel length of 20". In the case of the 223 Remington (M193), ammunition loses or gains about 25.7 ft/sec (7.8 m/s) for each inch of barrel length, while 5.56×45 mm NATO (M855) loses or gains 30.3 ft/sec (9.2 m ...
On January 28, 2021, the MDRX Micron conversion kit was announced that allowed the purchase of a 11.5" 5.56/.223 Wylde barrel, replacement hand guard, ejector plates, a new 'Raiden' flash hider, and bolt replacement for a side eject bullpup with a total length of 23.43". [24]
The Mini-14 is a lightweight semi-automatic rifle manufactured by Sturm, Ruger & Co. Introduced in 1973, the design was outwardly based on the M14 rifle and is, in appearance, a scaled-down version chambered in 5.56×45mm NATO, though with its own gas system design. Since 1973, Ruger has introduced several variants, including variants chambered ...
.223 Remington – Original AR-15 cartridge: .223 cartridges may function in a 5.56×45mm rifle, however 5.56×45mm cartridges may produce excessive pressure in a .223 Rem rifle. On the other hand, a .223 Wylde chamber is used on .223 Rem rifle barrels to allow them to safely fire either .223 Remington or 5.56×45mm NATO ammunition. [6]
The first version produced for commercial sale by Colt was the SP1 model AR-15 Sporter in .223 Remington, with a 20-inch (51 cm) barrel and issued with five-round magazines. [21] Initial sales of the Colt AR-15 were slow, primarily due to its fixed sights and carry handle that made scopes difficult to mount and awkward to use. [ 82 ]
These barrels are also available with rifling ranging from 356 mm (1-in-14") to 178 mm (1-in-7"). US makers are moving toward 5.56×45mm NATO and 178 mm (1-in-7"), which will ensure the least liability. [25] Those chambered for .223 Remington may not have a fast enough rifling to stabilize the longer 5.56×45mm NATO bullets which range up to 77 gr.
The Desert Tech WLVRN, pronounced "Wolverine", is the successor to the company's MDRx bullpup multi caliber weapon system. The WLVRN was first showcased at the 2024 Shot Show convention in Las Vegas. [2] The rifle aimed to improve various aspects of the MDRx platform that were determined to be limitations of the platform that were acknowledged ...