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View Full Version : feed ramp clearance?


bcass
February 26, 2009, 00:01
Can some people post pictures of their feed ramps with mags inserted? I just got a freshly made entreprise arms receiver and am questioning if my feed ramps are correct. I'll post pictures as soon as I have them of mine.

bcass
February 26, 2009, 01:51
Ok, I just compared them to the old receiver stub that came with my imbel kit, they are way too shallow compared to the original stub.

I had the same result with another mag aswell

And some pictures.

http://i263.photobucket.com/albums/ii153/BenjaminSC/FAL/feedramps.jpg http://i263.photobucket.com/albums/ii153/BenjaminSC/FAL/feedramps1.jpg http://i263.photobucket.com/albums/ii153/BenjaminSC/FAL/feedramps2.jpg

SIG552
February 28, 2009, 02:08
But does the weapon feed properly? If so, I wouldn't worry about it dude.

L Haney
February 28, 2009, 08:35
If it makes you feel better, go ahead and polish them some. You don't want to remove metal, and you sure do not want to change the angle. Just make them smooth and shiny. Now is the time to check the rail/mag lip interface. The inside edges of the rails should be a close match for the magazine lips. If the rails over hang the lips, they need dressing back a little till they match. Then break that 90 degree corner on the bottom edge slightly so there are no sharp edges for the rounds to hang up on as they pop out of the mag. The top flat surfaces of the rails need to be smooth also. Friction between the matching surfaces of the bolt/carrier and these rails will make operation slower and less reliable. So polish them up too. Fine grit (320 and above) sandpaper works good for this. I used a small piece of wood to keep the paper flat. I took off all the park on mine. If you can put the bolt/carrier in the upper and tilt it back and forth 15~25 degrees and the carrier group slides easily, you're there.

bcass
February 28, 2009, 10:35
I went out and bought 20 rounds of .308 win and fed it through by hand, the right side seems ok, the left side seems to stick a little when a round loads. The round hits just a little left on the feed ramp. That couldbe becuse I was doing it by hand with no barrel. I guess I'll have to wait until I can barrel it to find out if the left side feeds reliably.

Deltaten
February 28, 2009, 11:41
Left side feed always seems to be problematic. Dunno what Saive was thinkin'??
Try the "floor" fix first. Try another mag ta see if it's just that one or all. Doubtfull if ALL mags are katty-whumpus; so that leaves the fitment in the receiver as suspect. Check tightness to floor of rcvr/vertical axis. Could be a tad loose on either end. Easy enuff fix on the back; a little tougher on the front
As suggested; only polish the ramps. A little Dykem or magic marker to note exactly where the tip is going...ya can't always rely on copper marks ;) Ya say it's pointing left a bit..then polish a bit further in that direction.

Ya *do* have the bbl. , don't you?
Spin it on hand tight for feed check (remove FDP !); then back it off ta get in and do what's necessary. A reminder to "cut the cheapest part first" doesn't always apply. If it's the receiver that's outta whack;bring it to spec FIRST, then proceed with other mods needed... DAMHIK !! :eek:

ggiilliiee
February 28, 2009, 12:50
http://community-1.webtv.net/ggiilliiee/GGIILLIIEESRAIL/