Rear rails

You’re not gonna get a 90° bend out of the back half of the rails, but you will get a 90° bend out of the front of the rails if you put them in your vise correctly and hammer on them accordingly. The only thing I can think of outside of that would be to cut the back tabs that seat into the frame completely off, and then you would have to lower the pin holes in both rails, evenly, just a hair. When this is done correctly, they shouldn’t move in any way once they are pinned in. I have racked my brains for days and it is the only way these people are pulling this off. That being said you can modify a 5D tactical rail system that will fit in there. No problem. It comes down to your level of confidence when working with these materials as your quality of tooling . I also recommend you spend a very long time thinking about what you’re going to do before you do anything at all. I hope this helps.

The 80% arms split rail system can be modified to fit in an Geiszler

W a couple minor adjustments to the frame, all sorts of aftermarket systems work. The rear rails are no different than aftermarket rails. It’s the trigger housing pin that determines the height of the rails. So…… if you look at all these bills, you’ll see that the trigger systems sit just a little high than they should. That’s because their shit is supposedly designed that way. What are you Gotta do is drop that pin just a hair and you’re in there. You do, however have to be brave enough to alter the frame or cut the existing rails so they set a little lower. Compare the Geiszler rails to aftermarket rails like they’re width and length and you will see that aftermarket rails are a little shorter and fatter. No aftermarket rails depend on a tail fin. So if you cut the tail fin off, you’re left with a standard rail that you can lower if you lower the pin, measure the distance between the frame, and the back end of the injector, you’ll see that there’s a little tiny gap and people are always talking about shimming that situation, what you Gotta do is lower the pin. If you do, you’ll have rails that sit flush. You only get one shot at this. So I think it through, only use Bradpoint bits!!! you’re only going to lower it like a millimeter. Also, if you look at the inside of a P80 frame and compare it to the Geiszler, you can see that with a couple cuts here and there yeah you can have just as much freedom with a Geiszler as you would a P80. feel free to hit me up I can go in to much further depth. I’m trying to find someone who’s willing to talk about this because I can prove my shit. I have a rook tactical rail system that fits, I just had to make a little cut here and there. Nothing detrimental, nothing major, totally achievable. you could cut a Geiszler front rail system in half and use the front end as a split rail system, and put an OEM Glock locking block in there and it would be cherry. Is there anyone thinking outside the box like this?

So…..Cut the fins off the back end of the Geiszler rear rails….. and then lower that pin. But that means you need to drill the pin holes slightly lower from the start. That’s wear things get tricky because you need to go outside of the jig to do this. And it’s a tiny little adjustment. It’s just enough to make the Geiszler rails completely level with the raised area in the back of the frame that the back of the ejector sits upon. There shouldn’t be any space between the back of the ejector, and the frame when things are all pinned together.