Folks there have been many conversations on Feed Ramps so I wanted to show everyone some examples of Feed Ramps by different Manufacturers.
Please forgive the inside photos it was raining most of the day and no use taking a perfectly dry gun out in the rain just for a few quick pics.

First off here are our test subjects.
Starting at the Top going down we have:
DPMS
Colt
LMT
Charles Daly


1. Subject is the Charles Daly LE / M4 Rifle.
Rifle has
ARMS SIR
E-otech 557
ARMS Rear BUIS
Gear Sector Single Point Sling
Surefire M900


Now the Charles Daly Feed Ramps




2. is the LMT Defender 2000 LE and Military Rifle.
ARMS SIR
AGOC NSN
ARMS Rear BUIS
Suefire M900
Gear Sector Single Point Sling Attachment.


LMT Feed Ramps "I opened the door trying to get daylight to get a clearer pic"




3. Colt A2 nothing changed other than the barrel has a M-4 Barrel and removed that shitty oversize front pivot take down pin and installed a ball spring loaded pin in its place.


Colt Feed Ramps




4. DPMS LEO M4


DPMS Feed Ramps




Now the Bolt and Carrier Group. These BCGs' are for AR15, there are no FA BCGs' in the photo.
Left to Right is
Charles Daly, LMT, Colt and DPMS


Top Half BCGs'


Bottom Half BCGs'

Here are some images from my S&W M&P15A for the feedramp/carrier thread in the reviews section..