SHTF guns and ammo to have?

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AR-14

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AR-1 "Parasniper", bolt-action rifle (1954 prototype, was not developed further)
AR-3, 7.62×51 mm NATO select-fire battle rifle (prototype, used as a test-bed for rifle design features)[17]
AR-5, .22 Hornet bolt-action survival rifle (1954–1955), was submitted to replace the Air Force's standard survival rifle.
AR-7 "Explorer", .22 LR semi-auto survival rifle
AR-9, semi-auto 12-gauge shotgun (1955 prototype, forerunner of the AR-17)
AR-10, 7.62×51 mm NATO select-fire battle rifle (1955–1959)
AR-11, .222 Remington select-fire rifle (prototype, smaller version of the AR-3)
AR-12, 7.62×51 mm NATO select-fire battle rifle[18]
AR-13, hyper-velocity multi-barrel machine gun for aircraft
AR-14, .243 Winchester, .308 Winchester, or .358 Winchester semi-auto sporting rifle (1956)[19][20][21]
AR-15, .223 Remington select-fire rifle (smaller version of the AR-10 and forerunner of the M16 rifle, made from 1956-1959)
AR-16, 7.62×51 mm NATO select-fire battle rifle (1959–1960)
AR-17, semi-auto 12-gauge shotgun[22][23]
AR-18, .223 Remington select-fire rifle (smaller version of the AR-16, made 1962–1964)
AR-180, .223 Remington semi-auto sporting rifle (civilian version of the AR-18)
(Armalite, Inc. 1996–present)

AR-10B, .308 Win semi-auto rifle (1994–Present)
AR-10A, .308 Win semi-auto rifle (2006–Present) (re-designed AR-10 - most parts are not compatible with AR-10B)
AR-10 SuperSASS, .308 Win semi-auto sniper system (2006–Present)
AR-20, .50 BMG single shot rifle (1998–1999)
AR-22, blank firing device for the Mk 19 40 mm grenade launcher (1998–2008)
AR-23, sub-caliber training device for the Mk 19 40 mm grenade launcher (1998–2008)
AR-24, 9 mm pistol (2006–2012)
AR-30, .308 Win, .338 Lapua Magnum, .300 WIN MAG bolt-action rifle (1999–2012)
AR-30A1, .300 WIN MAG, .338 Lapua Magnum bolt-action rifle (2013–present) (re-designed AR-30; most parts are not compatible with AR-30)
AR-31, .308 Win bolt-action rifle (2013–present)
AR-50, .50 BMG single-shot rifle (1998–present)
AR-180B, 5.56 mm semi-auto rifle (2001–2009)
M-15, 5.56 mm semi-auto rifle (1994–present)

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