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22 Grendel (wildcat) aka 224 Grendel. .22 Nosler. .22 PPC. .22 ARC. .222 Remington (sometimes chambered in countries where ownership of military cartridges is illegal) .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.
It is available for the civilian market in 5.56×45mm NATO, 6.8mm Remington SPC and .450 Bushmaster via conversion kits. [9] A 7.62×39mm conversion kit was done by Templar Precision. [28] The trigger/manual safety unit is made as a single removable item, and mostly utilises AR-15 compatible parts.
List of Colt AR-15 and M16 rifle variants. ArmaLite AR-15 with the charging handle located on top of the upper receiver, protected within the carrying handle and a 25-round magazine. 1973 Colt AR-15 SP1 rifle with "slab side" lower receiver (lacking raised boss around magazine release button) and original Colt 20-round magazine.
A caliber conversion device is a device which can be used to non-permanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire. The different cartridge must be smaller in some dimensions than the original design cartridge, and since smaller cartridges are usually cheaper, the device allows ...
The Ares Defense Shrike 5.56 is an air-cooled, dual-feed rifle for semi or full-auto configurations that fires the 5.56×45mm NATO cartridge. The Shrike 5.56 can be supplied as a complete weapon, or as an upper receiver “performance upgrade kit” to existing M16-type service rifles and carbines. it is named after the Shrike, a carnivorous passerine bird, and was designed by Geoffrey Herring.
Hanuman AR-15 Bullpup. The Hanuman AR-15 Bullpup [1] [2] which was made public in May 2014 [1] [2] is a prototype AR-15 rifle Bullpup [1] [2] created by WarFairy [1] [2] According to the creators "It requires a bufferless upper to function, such as the ARAK-21 or Rock River Arms PDS Carbine, or a regular upper with a CMMG Style .22LR Conversion ...
The conversion can be accomplished by field stripping the firearm and replacing the slide assembly and magazine—a process that can be accomplished in minutes. The Classic 22 use a 10-round polymer magazine in lieu of the steel magazines used by the centerfire models and conversion kits.
Poland: Jednostka Wojskowa Grom and JW Formoza acquired the SIG MCX VIRTUS and MCX RATTLER in .300 AAC Blackout with conversion kits to 5.56×45mm NATO and 7.62×39mm ammunition. [58] Also used by Internal Security Agency [59] and State Protection Service [60] Portugal: Polícia de Segurança Pública acquired SIG MCX in 5.56×45mm NATO.