cutting m4 feedramps into an upper that doesn't have them [Archive] - Colorado AR-15 Shooters Club Discussion Forums

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tmsand338

11-16-2012, 17:57

Can this be done? By who..... any gunsmith? General cost of this service?
Thanks

kwando

11-16-2012, 20:25

http://www.ar-15.co/threads/71393-m4-feedramps-question?highlight=M4+upper

ray1970

11-16-2012, 20:51

Do you own any small files and some sandpaper? [Awesom]

kwando

11-16-2012, 21:24

Do you own any small files and some sandpaper? [Awesom]

This idea is worthless without pics

ray1970

11-16-2012, 21:30

This idea is worthless without pics

Are you doubting my ability to make two tiny scallops in a piece of aluminum? [Coffee]

SideShow Bob

11-16-2012, 21:31

Do you own any small files and some sandpaper? [Awesom]

By doing this you remove the anodizing and expose the softer aluminum underneath.
Which could cause early erosion from the hot gases during ejection.

ray1970

11-16-2012, 21:38

By doing this you remove the anodizing and expose the softer aluminum underneath.

You're right, Bob. With such a small area that is affected I really doubt it will hurt anything. I could be wrong though.

To the OP.... I have run barrels with M4 cuts in receivers that didn't have the cuts with no problems. Of course I have also owned rifles that didn't have the M4 cuts in the barrel extension or the receiver and they ran just fine too.