The AR15 is a 5.56x45 rifle. Incidentally, it is also capable of chambering and firing the .223 Remington, which is similar in dimension, but the two are not identical. That's the norm. AR15 rifles can be had in a number of calibres nowadays, to include 6.8x43 Remington SPC, 6.5 Grendel, .458 SOCOM, .50 Beowulf, 5.45x39, 7.62x39, .204 Ruger, 9x19 Parabellum, .40 S&W, .45 ACP, 6x45, .450 Bushmaster, and others.
cal. 223 or 5.56
Not recommended.
$800.00
50-1200 usd
Depends on condition, etc. Price range from 500-1000
100-1000 USD or so depending on specifics.
1977. Value depends on conditon and accessories. Range 500-1100
There is no legal definition of "assault rifle". If you mean an AR15 style rifle, then it depends on the rifle, and what you are hunting. An AR15 firing .223/ 5.56mm can be used for small game. For big game, the rifle may not be capable of holding more than 6 rds of ammo, and must be .24 caliber or larger, with 1000 ft lbs of energy at 100 yards. The AR15 in .223 will not meet those standards. A larger AR, such as the AR10, could meet them. No fully automatic firearms may be used for hunting.
No, the two numbers are clearly different. In a more practical note, "7.62" is the diameter (in millimeters) of a bullet typically fired from a .30 caliber rifle such as a Chinese SKS or Russian AK-47 rifle, while "5.56" is the diameter (in millimeters) of a .223 caliber bullet like the M-16 or AR15 rifle.
The NORINCO CQ5.56.
Made 1974 if sn reads SP33829. Value depends on condition. Range from 500-1000
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The M4 is capable of automatic fire, the AR 15 is not