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Posted: 7/1/2017 9:06:46 AM EDT
| I drilled out the holes and found that he drilled the screw for the hammer all the way up in the trigger area will this affect the build. I bought ten of these and its happened twice I would appreciate any help you can offer. |
| On the 80%arms jig you drill out the holes and you then mill out the rest well I drilled the required holes and in the second to last one there is the threaded screw for the handle I checked the jig and I didn't drill too deep but I guess when he drilled and tapped the hole for the handle he went to far.I never assembled a lower so I don't know if that will affect anything. |
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If the hole for the grip screw is threaded all the way into the receiver this is not a bad thing - there is actually a way to uilize this to lighten the trigger pull on builds. People buy threading tools to actually thread the whole hole if their lower doesn't have it.Â
Google something like ar15 grip screw trigger mod and you should find some videos. |
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Take a look at commercial lowers. The hole goes all the way through. In some cases it is not threaded all the way through.
There are some companies that sell grip screws with a small set screw in the end to adjust the trigger. Some sort of poor man trigger improvement device. Keep going with your milling efforts. |
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Quoted:
I drilled out the holes and found that he drilled the screw for the hammer all the way up in the trigger area will this affect the build. I bought ten of these and its happened twice I would appreciate any help you can offer. There is no problem with this however, your wording suggest that you purchased the 80% lower and then had someone else drill some holes as well. You might want to rethink your wording in the spirit of the ATF that it should only be you doing the material removal etc. |
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The grip screw socket goes all the way through the grip mounting area, no matter if it is fully threaded or not, the only hole for the hammer is forward of that area for the hammer pin and then you have a trigger pin hole and a safety hole which is larger than the rest of the holes in the receiver.
When I am doing a lower, I drill 1/4" deep on the pin holes and safety hole on each side the receiver and they become exposed when I finish the milling of the pocket. The reason I do this, is it gives me a reference point as I mill the receiver to know how deep I have milled, once they are exposed in the pocket, I then start going slower and using my depth reference gauges. I will be glad when I have my DRO's installed, then I will be able to set my reference number in my DRO's |
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Quoted:
I tap mine all the way through. I have a few 80%s that didn't have enough threads to fully tighten down the grip OP has never assembled a lower and is doing 10 of them from 80%? Ok. |
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Quoted:
This. If your milling is revealing the hole for the grip, no big deal. I expect to see mine and tap it all the way through. OP has never assembled a lower and is doing 10 of them from 80%? Ok. |
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