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Posted: 9/30/2004 4:34:17 PM EDT
Thanks for your help.
Russ
Link Posted: 9/30/2004 4:37:30 PM EDT
[#1]
I believe the M4 feed ramps are a Colt patented design.

Someone correct me if I'm wrong here.  
Link Posted: 9/30/2004 4:38:26 PM EDT
[#2]

Do Bushmasters new M4 rifles have the M4 feed ramps cut into the upper reciever like the Colt?  



None that I have seen.
Link Posted: 9/30/2004 4:39:53 PM EDT
[#3]
Just looked, nope, they are different.
Link Posted: 9/30/2004 4:59:06 PM EDT
[#4]
I bought two M4 uppers directly from BM last week and neither have M4 feed ramps.
Link Posted: 9/30/2004 5:01:42 PM EDT
[#5]
The feed ramps, unlike the double heatshield handguards, are not patented.

BFI uppers do not have the feed ramps.  LMT and CMMG uppers do.
Link Posted: 9/30/2004 5:31:11 PM EDT
[#6]

Quoted:
The feed ramps, unlike the double heatshield handguards, are not patented.

BFI uppers do not have the feed ramps.  LMT and CMMG uppers do.



Aha, I stand corrected.  
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