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5/15/2006 6:21:31 PM EDT
Hello all.

Are there any tricks to trimming the upper rails? I have been using files, cut off wheels, grinding stones but still can't find a good method. The metal really eats up my dremil bits quick. Filing is too slow and the metal "shakes" making it difficult. This is my first build so I am still learning.

Thanks for any help.
5/15/2006 6:53:26 PM EDT
[#1]
I used a dremel and lots of disks.  A grinding stone works ok when you get to the finer trimming. Yeah it's messy.  
5/16/2006 5:20:51 AM EDT
[#2]
Ditto...I've been using a dremel and lots of disks to trim my rails.  I purchased a diamond wheel, but find using a regular cutoff wheel to be just as easy.
5/16/2006 5:24:38 AM EDT
[#3]
Use the fiber reinforced wheels, they last longer.
5/16/2006 6:05:09 AM EDT
[#4]
I use a piece of angle iron. Not sure of the size at the moment but it fits perfectly inside the receiver and acts as a stop and guide to rail depth. Then I just slide the whole thing over a bench grinder with the guard removed and instant joy! I finish up and make cutouts with a dremel sanding drum (60 grit coarse) and  then deburr it all. You guys will work yourselves to death with cut-off wheels.
5/16/2006 1:37:01 PM EDT
[#5]
Very interesting, more info please.
5/16/2006 9:26:10 PM EDT
[#6]
Well I did the cut off wheel method. I put the receiver in a vice with a piece of metal inside for support and used a sanding drum to debur. Took a while but seems to have turned out great.

I may have trimmed a tad too much, but the bolt carrier will slide thru nicely.

Thanks everyone!
5/17/2006 6:12:32 AM EDT
[#7]

Quoted:
I use a piece of angle iron. Not sure of the size at the moment but it fits perfectly inside the receiver and acts as a stop and guide to rail depth. Then I just slide the whole thing over a bench grinder with the guard removed and instant joy! I finish up and make cutouts with a dremel sanding drum (60 grit coarse) and  then deburr it all. You guys will work yourselves to death with cut-off wheels.



You'll shoot your eye out!
5/17/2006 7:22:06 AM EDT
[#8]

Quoted:

Quoted:
I use a piece of angle iron. Not sure of the size at the moment but it fits perfectly inside the receiver and acts as a stop and guide to rail depth. Then I just slide the whole thing over a bench grinder with the guard removed and instant joy! I finish up and make cutouts with a dremel sanding drum (60 grit coarse) and  then deburr it all. You guys will work yourselves to death with cut-off wheels.



You'll shoot your eye out!



I'll shoot your eye out!
5/17/2006 10:23:20 AM EDT
[#9]
I use coarse sanding drums on the Dremel and then file lengthwise to get them nice and straight.
5/17/2006 1:23:36 PM EDT
[#10]
I use two peices of 3/16 inch 2 inch flat stock put together with JB weld with about a one inch gap at the top, between the two peices.  Then by securing the peices to your blank you can use it as a gaurd to trim the rails with a drimel cut off wheel.  Try the reinforced cutoff wheels this will get you in the balpark for final trimming.  

Secure the peices of flatstock to your reiceiver with the over lap above your rails and use it as a gaurd/guide for your cutoff wheels.  

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