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Discussion Starter · #1 ·
Are all of you using the new flat bending jigs finding that the lower rails that come with the flat from tapco are fitting the flat properly? Are the holes drilled in the rails lining up perfectly with the center support holes on the flat when they are in the placed in the proper position????? ak'sr4me
 

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I have been elongating them to allow the rails to move upward about .040.Before welding with C,D,E,F spacing from underside of top rail.Jig is my own design and dimensions my best guess between drawings on net and fitting of the gun parts.The first flat bent didn't need holes egged out but I didn't allow for bend radius in my math and it was not tall enough. Added .020 per bend.The rails had to be modified after that.But the parts fit better and they compared with other recievers in overall dim. except that the Hesse and Vulcan lower rails were way too low.So I went with it and have bent a dozen which go to the oven next week I hope.Don't know about anyone else. :)
 

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ak'sr4me said:
Are all of you using the new flat bending jigs finding that the lower rails that come with the flat from tapco are fitting the flat properly? Are the holes drilled in the rails lining up perfectly with the center support holes on the flat when they are in the placed in the proper position????? ak'sr4me
Im using Tapco flats, I will fit mine today and let you know what I find out. Im glad someone is noticing this. Thanks for the heads up.
 

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Ah ha, those do look a bit nicer.Wish I would have discovered them sooner.With the 7.62 you have to grind off most of the little stabilizer anywho.The extra beef of a fresh clean hole would help the hammer pin though.They seem rather proud of them when in stock
 

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7.62x39 said:
I only use the rails that come with the flats for welding practice.
In my opinion that's all their good for

I only use these rails for building http://www.k-var.com/subcatmfgprod.asp?0=216&1=223&2=-1&6=1

Besides being correct, they are also undrilled, so no egging is required

Related thread http://www.gunco.net/forums/showthread.php?t=748
Listen to old "wise" guys around here! You won't really care until you go the other route and have a helluva time. I have tried to use the rails that come with the flats and have been successful, but not without any headaches. Having the holes not drilled in the rails is a definite plus!
 

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Discussion Starter · #7 ·
The reason why I asked if you guys were still encountering problems with tapco rail holes being off location, isn't because I have been having problems.I have been making my own rails all along but I just got a flat bending jig from justashooter and I bent my first tapco flat and the tapco rails fit perfect and aligned perfectly with the holes in the flat. I new I had saw some posts form you guys saying they were having trouble with them and wondered if maybe tapco changed there design to make them work better. This is the easiest build I haver ever done and I love the jig from justashooter. It is simple but works great and all you need is a BFHammer. I have a 12 ton shop press but I didn't have to use it with his design. So it looks like I will be only spending about 20 dollars to make a receiver from now on. ak'sr4me
 

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I just bent some Tapco flats and the rails from Tapco lined up fine. Problem I found is that the left rail is perfectly spaced with a "F" drill while the right rail is low by around .040 to .050 inch. Since I am just starting, I am no expert, but I would guess that having the rails at the proper spacing from the top of the receiver is more important than having the holes line up. Correct?
 

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keiser said:
..... I would guess that having the rails at the proper spacing from the top of the receiver is more important than having the holes line up. Correct?
Absolutely.
That's one of the pluses of starting with the undrilled rails, You determine the hole location that is correct for your particular receiver
 
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