AR 15 Upper Question

[possom813]

How difficult is it to use an upper without m4 feed ramps?

I have an upper without m4 ramps, and looking to find a barrel, but I haven't found any in stock that don't have m4 somewhere in the description.

 

[HOOfan_1]

M4 feed ramps on the barrel, with none on the receiver is fine.

Rifle feed ramps on an M4 receiver is no good

BTW, the above was not made by me

 

[possom813]

Ok, my feeble mind is slightly confused. I think I'm reading it right.

The receiver does not have m4 feed ramps.

The barrel "potentially" will have m4 feed ramps.

The above combination is ok, correct.


Basically, the way I understand it, the receiver without the m4 feed ramps will work on a barrel with or without m4 feed ramps.


Am I right, or is my brain not comprehending the text correctly?

 

[HOOfan_1]

Yes, if the upper has no feed ramps milled into it, you can use either barrel extension.

If the upper has M4 feed ramps, you need a barrel extension with them or the nose of the bullet is going to get caught on the barrel extension

 

[MrCleanOK]

Possom813, you are correct! And if your rifle isn't an auto, you'll likely see no ill effects from using a rifle (no M4 ramps) upper receiver.