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AR15.COM
9/12/2012 7:06:25 PM EDT
I am having FTF problems and it is all related to the feed ramps. I found a thread where someone is having the same problem...
http://www.ar15.com/forums/t_3_66/584699_Bullet_jamming_on_feed_ramps_.html
Anybody got anymore tips or could give me a hand ?
9/12/2012 10:11:25 PM EDT
[#1]
Quoted:
I am having FTF problems and it is all related to the feed ramps. I found a thread where someone is having the same problem...
http://www.ar15.com/forums/t_3_66/584699_Bullet_jamming_on_feed_ramps_.html
Anybody got anymore tips or could give me a hand ?


Pics? Manufacturer of lower/upper/bbl? Age of rifle? Run dry or wet? Ammo? Mags?

We need a little more info.
9/13/2012 3:53:13 AM EDT
[#2]
Start with the easiest solution-  have you tried different magazines?
9/13/2012 6:00:33 PM EDT
[#3]
Del-Ton upper and lower
Rainier Arms Match stainless barrel (may have been made by WOA)
Pamg 20's
Rifle was bought new 2 years ago it was all factory M4 style rifle
less than 600 rounds before install of new barrel 20 rounds after new barrel
9/13/2012 6:35:22 PM EDT
[#4]
if you are near Macon swing by the shop.......do you have a barrel with rifle feed ramps in an M4 Upper receiver?
9/13/2012 6:57:40 PM EDT
[#5]
Quoted:
if you are near Macon swing by the shop.......do you have a barrel with rifle feed ramps in an M4 Upper receiver?

That I am not sure about it is a Mid length Rainier Arms Match Grade .750 profile 14.5 1/8 twist.
Yes, I am not far from you... Aren't you in Bolingbroke ?
9/13/2012 8:34:20 PM EDT
[#6]
Take a picture of the barrel extension inside the receiver, we'll be able to eliminate the wrong feed ramp cuts pretty quickly that way.
9/16/2012 8:55:16 PM EDT
[#7]
Have not got any pics yet...
9/17/2012 2:09:05 AM EDT
[#8]
Rainer's site says it has M4 feed ramps. I have a Delton complete light weight 16" upper and it does NOT have M4 cuts. If yours was sold with an M4 profile barrel it should but would definitely be worth checking.
9/17/2012 5:26:27 AM EDT
[#9]
Quoted:
Quoted:
if you are near Macon swing by the shop.......do you have a barrel with rifle feed ramps in an M4 Upper receiver?

That I am not sure about it is a Mid length Rainier Arms Match Grade .750 profile 14.5 1/8 twist.
Yes, I am not far from you... Aren't you in Bolingbroke ?


Nope...just off 475 at the Thomaston Road exit.....PM'd ya the shop number give me a call.....I'm not a traditional gunshop ...YET....
In the process of changing the focus of the machine shop to 100% firearms