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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 01-03-2010, 9:13 PM
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Default Make the AFG fit! (my how-to w/pics)

Well, I discovered the AFG will/does not fit on the MRP rails with any side rail protectors installed if the side rail protectors extend past the raised forward portion of the AFG. This is similar to reports of the same issue on Larue Rails.

There is not enough clearance room between the forward raised portion of the AFG and the bottom portion of the side rail protectors where it clamps on to the side rails. I tried with both the Tango Down rail panels, and ladder type lo-pro rail covers, no go. It was like trying to stick a square peg into a triangle shaped hole.

Trying with tango down panels

Same issue with low-profile ladder covers


It will fit fine on the MRP without side rail covers, but I didn't want to run my rifle with bare rails chewing up my hands. So, I came up with a way to slightly modify the AFG to make it play well with my other accessories. Here is how I did it:

The AFG stock and unmodified:

Notice the 90-degree rectangular angle:


I needed to remove some of the extra plastic on the raised portion of the AFG to get it to fit. I thought about using a dremel tool, but felt it would be too difficult to control. A dremel would make it hard to keep the edges as even as possible, and perhaps remove too much polymer. I'm not a fan of using power tools for minute/precise tasks and have heard many horror stories about dremels and guns crossing paths. I wanted to alter the AFG as little as possible, not go crazy with a dremel. My objective was to just barely change the profile of the AFG enough to get it to fit, and to keep it as clean as possible perhaps to the point no one would know you modified it unless you told them.

So instead of using a dremel, I used a fine grit grinding stone. Using long, even pressured strokes, I took my time and slowly filed away small portions of the raised area of the AFG at a time.





(Continued next post)
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  #2  
Old 01-03-2010, 9:13 PM
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Instead of the 90-degree angle it comes stock as, I filed down only a couple of millimeters of the polymer creating a 45-degree "knife" edge. I did not grind down any of the material to change the actual height of the raised portion of the AFG. I merely ground enough away to change the angle from 90-degrees to 45-degrees. I did the same thing on both sides of the raised area of the AFG.

Side view after modification

View from the rear after modification


After creating the slight angle, just enough room was created to be able to slide the AFG right onto the rails with side rail protectors. And I didn't have to alter the overall profile of the AFG.

With Tango Down panels after modification

With low-profile ladder covers after modification


So if you have an MRP or Larue Rail and can't seem to get the AFG to fit properly with side rail covers, or you have a one of these rails and wanted an AFG but read about these fit issues, don't fret. A slight shaving of polymer and you can get your AFG to slide right on with ease and play well with others on your rails!

Finished project:




Hope this can help others out there who ran into the same issue I did. And you don't need to "take a dremel to it!" Slow, steady, and clean, save the power tools for another occasion. Others with comments/suggestions for fixes please put ‘em up here!

Last edited by pipboy; 01-03-2010 at 9:33 PM..
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  #3  
Old 01-03-2010, 9:14 PM
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nice job!
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  #4  
Old 01-03-2010, 9:17 PM
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nice.. I could see this being an issue for some and it is a clean unobtrusive fix to the prob
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  #5  
Old 01-03-2010, 9:19 PM
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Bravo!
Great attention to detail.
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Old 01-03-2010, 9:40 PM
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You are truly gifted at close-up photos. Great tutorial!
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  #7  
Old 01-03-2010, 9:52 PM
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I responded to your post last night in the other thread. http://www.calguns.net/calgunforum/s...=254401&page=4

great job though! But with XTM rail covers a little more is needed so that the AFG doesnt spread them off the rails on the LMT MRP!
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Old 01-03-2010, 10:24 PM
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Thanks for the complements!

Quote:
Originally Posted by DanHuuN View Post
I responded to your post last night in the other thread. http://www.calguns.net/calgunforum/s...=254401&page=4

great job though! But with XTM rail covers a little more is needed so that the AFG doesnt spread them off the rails on the LMT MRP!
Thanks for your response, I couldn't really comment because I don't have any XTM panels though. I'm sure your post will help someone out there running that same kit! It looks like it will take more work as the XTM panels come down a bit lower than the covers I have.
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Old 01-03-2010, 10:27 PM
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Very well written, and the pictures are top notch.
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Old 01-03-2010, 10:44 PM
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Quote:
Originally Posted by pipboy View Post
Thanks for the complements!



Thanks for your response, I couldn't really comment because I don't have any XTM panels though. I'm sure your post will help someone out there running that same kit! It looks like it will take more work as the XTM panels come down a bit lower than the covers I have.
No prob. I do like your articulated "how-to" though!
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  #11  
Old 01-03-2010, 10:58 PM
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Wow, very nice job! It completely looks like it should have been that way.
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  #12  
Old 01-03-2010, 11:20 PM
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And THIS is how businesses are started!

Good work.
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  #13  
Old 01-04-2010, 7:32 AM
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nice work! great write-up & pics.
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  #14  
Old 04-07-2010, 8:33 AM
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Thank you for the tutorial
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  #15  
Old 04-07-2010, 9:14 AM
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Great info, thanks.
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  #16  
Old 04-07-2010, 9:58 AM
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Very nice. You would think they encountered this while testing.
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  #17  
Old 04-07-2010, 11:08 AM
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Beautiful job and pics, Very informative. Thanks for the the tutorial
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  #18  
Old 04-11-2010, 2:06 PM
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Thanks for the heads up, can't wait to get my new upper in so I can mod my fde afg to fit with my xtm panels

-Gio
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  #19  
Old 04-11-2010, 2:53 PM
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Good Job! Nice Triple Tap!
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  #20  
Old 04-11-2010, 3:17 PM
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This is nice if you currently have the AFG-1 but if you're in the market, just wait for AFG-2.

http://www.magpul.com/assets/files/2...edProducts.pdf
http://riflegear.org/p-702-magpul-af...fore-grip.aspx
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