Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login

Posted: 7/19/2008 8:11:27 PM EDT
IF THE BARREL IM PURCHASING HAS FEED RAMPS ON THE EXTENSION, DOES MY UPPER RECEIVER ASSEMBLY NEED THEM ALSO.
Link Posted: 7/19/2008 8:30:33 PM EDT
yes and no



iirc: m4 bbl xtension + no m4 feed ramped upper = ok

regular bbl xtension + m4 feedramped upper = bad
Link Posted: 7/19/2008 8:44:51 PM EDT
OK that only confused me more. What about having a m4 receiver assembly with a barrel extension with the feedramps.
Link Posted: 7/19/2008 8:52:13 PM EDT
Link Posted: 7/19/2008 8:53:51 PM EDT
Receiver with M4 cuts and barrel with M4 cuts= Good.

Receiver without M4 cuts and barrel with M4 cuts= OK

Receiver with M4 cuts and Barrel without M4 cuts= Bad.

Link Posted: 7/19/2008 8:57:56 PM EDT
[Last Edit: 7/19/2008 9:00:35 PM EDT by slamb750]
Thanks guys. What happens if the grooves dont line up like the pic in the lower left? Maybe to be on the safe side I should get the upper receiver assembly without the feedramps?
Link Posted: 7/19/2008 9:08:22 PM EDT

Originally Posted By slamb750:
Thanks guys. What happens if the grooves dont line up like the pic in the lower left? Maybe to be on the safe side I should get the upper receiver assembly without the feedramps?


I would question ANY upper you got like the one on the lower left. No vendor on this site would intentionally deliver that.
Link Posted: 7/20/2008 5:42:07 AM EDT

Originally Posted By slamb750:
Thanks guys. What happens if the grooves dont line up like the pic in the lower left? Maybe to be on the safe side I should get the upper receiver assembly without the feedramps?


That is a pic of a set up on a barrel with standard ramps & a receiver with extensions. As has already been stated that is not a good combo that you want to shoot with. If you can't find a M4 ramped receiver to go with your M4 ramped barrel extension then you will be ok buying one without as well.
Link Posted: 7/20/2008 12:43:45 PM EDT
[Last Edit: 7/20/2008 12:44:34 PM EDT by Half-Bear]

Originally Posted By slamb750:
Thanks guys. What happens if the grooves dont line up like the pic in the lower left? Maybe to be on the safe side I should get the upper receiver assembly without the feedramps?

If you look on the lower left pic, rounds could potentially get caught underneath the barrel extention, creating feeding problems
Link Posted: 7/20/2008 1:31:28 PM EDT
[Last Edit: 7/20/2008 1:38:15 PM EDT by rifleshooter474]
Here is a good picture of my LM&T Defender 2000 M4 feed ramp. Not easy to focus on it.

http://s168.photobucket.com/albums/u199/photobug4741/?action=view¤t=M4LMT.jpg

Here is a good picture of the feed ramp on my S&WM&P15T.

http://s168.photobucket.com/albums/u199/photobug4741/?action=view¤t=ChamberT15ajpg.jpg

Top Top