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9/22/2017 12:11:25 AM
Posted: 10/7/2003 2:25:45 PM EDT
I'm new to long guns and have spent many hours on this board reading and learning. Forgive me for asking potentially stupid questions. My knowledge base is primarilly handguns.

What are M4 feedramp cuts? How are these barrels different from a regular AR barrel? Are they necessary? What are the advantages?

I'm researching a new fighting-carbine upper for my PWA Commando and so far I know I want a flattop with chrome lined-lightweight contour barrel, USGI front sight tower, Vortex FS, 1-9" twist, and traditional hardguards. Now I read about M4 feedramp cuts. Is there no end to the option madness???
Link Posted: 10/7/2003 3:56:08 PM EDT
Troy has some good pics of th actual fedramp cute - I made soem but they sucked in comparrison. The M4 ramp is a deeper cut that goes into the upper receiver as well as the barrel extension. This will aid chambering and as well the rounds beign chambered will suffer less deformation - which should aid in accuracy.
Link Posted: 10/7/2003 5:24:24 PM EDT
I am considering a Bushmaster flattop (V-Match, I think) upper with their 16" lightweight profile barrel. Would BM have to make additional modifications for the M4 feedramp configuration?
Link Posted: 10/7/2003 6:49:44 PM EDT
Theyu will not add feed ramps. You will need to send the rifle off the Kurt Wala of KKF in the industry section of this forum to get them done. He is doing mine on my Bushmaster and does em for about $30 all the time. I forget his actual price quote but its a set price he does them so often.
Link Posted: 10/7/2003 7:18:48 PM EDT
Anyone have pics to show the difference?
Link Posted: 10/7/2003 8:40:40 PM EDT
Trot has them. There was a thread a few weeks ago about the feed ramp cuts that included these pics. Give the search engine a try.
Link Posted: 10/7/2003 9:02:01 PM EDT
I found that thread. It pretty much says it all.
Link Posted: 10/7/2003 9:05:36 PM EDT
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