M4 rifle


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RM
November 10, 2003, 07:29 AM
How is the M4 different from a standard 16" ar15 carbine? Why are some rifles called "M4gerys?" Thanks.

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Hkmp5sd
November 10, 2003, 09:04 AM
The M4 used by the military has semi and 3-round burst only. No longer fully automatic like the M16/M16A1/CAR-15/etc.

Since you cannot purchase a M4 due to the '86 machinegun ban, the only way to get one is make a forgery. Those that can't have full auto or collapsible stocks make an even worse forgery.

444
November 10, 2003, 09:24 AM
The idea is to have a civilian legal carbine that mimics the Army's current issue carbine as closely as possible. You can not easily or cheaply have the exact carbine for a couple reasons: The Army's M4 is select fire, the Army's M4 has a 14.5" barrel, if you are using a post-ban lower reciever you also can't have the flash suppressor or the collapsable stock.
So, you end up buying an upper reciever with a 16" barrel: 16" including a muzzle brake made to look like the military issue flash suppressor. The barrel will have a portion just in front of the front sight that is smaller diameter than the rest of the barrel; on the real M4 this cut-out is for mounting an M203 grenade launcher. On yours, it is for looks. You get either a fake collapsable stock or buy a pre-ban reciever so you can have the real thing. Oh, and you want a flat top upper reciever.
So, we call this a forgery or M4orgery since it is not the real thing, but is as close as we can easily get without jumping through a whole lotta hoops or breaking any laws. In the end you have something that looks very close to the real thing.

gun-fucious
November 10, 2003, 01:03 PM
http://quarterbore.com/images/sopmodm4.jpg

cordex
November 10, 2003, 01:39 PM
The M4 used by the military has semi and 3-round burst only. No longer fully automatic like the M16/M16A1/CAR-15/etc.
Lemme see ... not sure hor accurate this is, but off the top of my head, the trigger groups for M16 series rifles are something like this:

AR15 - safe/semi/auto
XM177 E1/E2 - safe/semi/auto
M16 - safe/semi/auto
M16A1 - safe/semi/auto
M16A2 - safe/semi/burst
M4 - safe/semi/burst
M4A1 - safe/semi/auto

Keep in mind, this ignores all the other differences in the rifles.

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