To put it simply, you can not. If you want a rifle that looks/functions like an M-16/M-4, but is semi-automatic, then it must have been an AR-15 imported into California and registered before the "California Assault Weapons Ban" took place - and you must have been the owner of it at the time as registration, as California made all so-called assault rifles non-transferable to any resident of the state.
If you want a civilian semi auto "M4gerY', you must either use a bullet button magazine release, or else have a completely featureless rifle (no pistol grip, no adjustable buttstocks, no flash suppressor, etc).
In California, it is nigh-impossible to obtain a fully automatic firearm.
An additional note, it is not an "Assault Carbine", it is a "Carbine, 5.56mm, M4". "Assault Weapon" is a BS term used by ignorant fear-mongerers, used to ban cosmetic features like pistol grips, bayonet lugs, and flash hiders.
The M4 carbine is chambered for the 5.56x45mm NATO cartridge. It will also accept .223 Remington rounds.
The M4 carbine is a shorter and lighter variant of the M16A2 assault rifle. The M4 is a 5.56×45mm NATO, air-cooled, direct impingement gas-operated, magazine-fed carbine. It has a 14.5 in barrel and is 33 inches long.. It weighs 6.5 lbs.
For now, the M16 is supplemented by the M4 carbine version, but there is no replacement named as yet.
The M4 CARBINE IS BETTER THAN THE M16.
The M16 assault rifle has a greater range than the M4 carbine as a result of its 20-inch barrel, compared with 14.5 for the M4. The M16 can hit an area target out to 800 meters while the M4 is effective to 600 meters.
It depends on the weapon. Eugene Stoner the designer of the original AR-15 designed it as a full size assault rifle , but he never got to see the gun become famous. Colt later took up the design and made it for the military it was produced as a full size assault. later the designs were made to fit in a carbine platform which is known as the M4 carbine assaultlt rifle. The M4 is the main weapon in the U.S. military.
No one will give you an M4 rifle/carbine for free.
M4 is the carbine- shorter barrel
The Colt M4 Carbine .22 is a replica of the real M4 but in .22 caliber.
There is an M4 carbine in Call of Duty: Modern Warfare 2.
The M4 carbine has a muzzle velocity of 2,970fps(884m/s).
The M4A1 is a variant of the M4 carbine, now capable of fully automatic fire. The M4 was in turn derived from the M16A2 assault rifle, which has rear sights adjustable for elevation and a brass deflector for left-handed users. The M4 and M16A2 share the same receiver and trigger group.