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The Ruger AR-556 is a semiautomatic AR-15 style rifle manufactured by U.S. firearms company Sturm, Ruger & Co. Introduced in 2014 as an entry-level AR-15 using a direct impingement action, with variants since being released such as the upgraded AR-556 MPR (multi-purpose rifle) in 2017 [1] and the AR-556 pistol in 2019.
The STG-556 uses magazines similar to those used by the Steyr AUG (10/20/30/42), [14] being made up of “radel” (polyphenylsulfone). [11] The rifles can also take 30-round STANAG and Magpul PMAG magazines. [10] The XM-17E4 variant can use STANAG magazines. Most STG-556 rifles made in 2009 did not allow to use AUG-type magazines unless the ...
The SR-556 is a semi-automatic AR-15 style rifle manufactured by Sturm, Ruger & Co. The rifle was introduced in 2009 in .223 Remington/5.56×45mm NATO and as a .308 Winchester AR-10 variant in 2013, the SR-762. [4] It is one of several AR-15 rifles to use a gas piston operation.
The Haenel MK 556 [2] (German: Maschinenkarabiner) [3] is a gas-operated selective-fire 5.56×45mm NATO assault rifle designed by German company C.G. Haenel.The MK556 was finalised in September 2020, and it is a fully automatic version of an earlier Haenel design, the CR 223, which was already in limited use by law enforcement agencies since 2017. [4]
Firing a 5.56×45mm NATO round out of a rifle chambered in .223 Remington could be injurious or fatal to the user as well as the gun, however .223 Remington ammunition can be fired safely from almost any rifle chambered in 5.56×45mm NATO as the NATO specified rifles can handle much higher chamber pressures than the .223 Remington is capable of ...
The market pushed SIG to produce the rifle with the slimmer profile 551-type handguards and a hooded front sight; this version is marketed as the SIG 556 Classic. [16] Several folding stock models have been released as well as variants with railed forend combinations. Another variant is the SIG 556 DMR featuring a 18 in (457.2 mm) barrel. [17]
The gun is quite ergonomic with its modular flip-up iron sight and five-position telescopic adjustable stock. The gun's length is 655 mm (25.8 in) when the stock is extended. It is made in 3 barrel length options, 368mm (14.5 in) 280mm (11 in) and 190 mm (7.5 in). The gun weighs 2,630 grams (93 oz) excluding the magazine. [1] KCR 556
A newer Ruger Precision Rifle "Gen 2" was announced on 6 May 2016 with several enhancements over the original. [4] The new version includes a new handguard, a hybrid muzzle brake (5/8-24 threaded), and a billet aluminum bolt shroud. The announced models were: .308 Win with 1:10 RH twist, 20 in (51 cm) barrel, weighing 9.8 lb (4.4 kg) [5]