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first time shooting new build
landon410:
added a little more to it today, its just a cheap UTG stock, but this is a cheap build.
Now just waiting on tax returns to get a complete upper.
landon410:
couple questions about all this as I only know enough to be dangerous
I don't have a wrench for the castle nut, is it imparitive to use those wrenches or if I can it tight by other means is that ok?
What are those other means? right now its just finger tight
also my rear take down pin, the hole for the detent is really tight so the spring isn't strong enough to push the detent into the take down pin, I'd prefer to not have to put a drill bit in there, any ideas?
landon410:
thanks for farmer rick for giving me this upper for half price, all I had to do was ask...
ok just kidding, but seriously thanks for the emails and time farmer rick.
the upper looks great, the only issue i have is the holes for the take down pins are about 1/16 off from the holes in the upper, IE my lower is a 1/16th longer than my upper. and i'm justing guessing on that measurement its propably like a 32nd, but anyways it doesn't line up.
I've read this is an issue with some of these eparmory lowers, which I used.
Suggestions? do I just file the alluminum hole on the rear take down pin a little bit until I can get that rear take down pin in?
SS_N_NE:
--- Quote from: landon410 on February 12, 2014, 08:24:50 AM ---Suggestions? do I just file the alluminum hole on the rear take down pin a little bit until I can get that rear take down pin in?
--- End quote ---
The most important term for an AR is "mil spec". That means dimesions are within a specified range and allows swapping, changing, replacing parts without needing fit work. The upper/lower takedown pin holes are 6.375" center to center (measure front edge of hole to front edge of hole for centers, or a caliper measuring accross takedown pins and subtract .250" to get centers). It would be important to determine which part is out of spec and not change/damage correct parts. Filing out holes would be poor gunsmithing and could create problems.
landon410:
upon further review and really studying the problem, the rear taken down pin hole in the lower itself is the problem, those holes don't line up, I did not drill the take down holes, those came from factory drilled at an angle.
I got it to fit with some finagling and doings, the upper and lower fit snuggly, not wiggle at all, there is a small gap toward the rear where the upper and lower mate, you can actually see light from the other side through the gap. This is an issue I have read about with this lower as well.
Seems like I did the research, I knew there were issues with the lower and I still used it.... it was cheap... get what you pay for.
Now in the future if I find a nice lower I can swap it out, I could even swap out my lower parts kit, so that might be something I look at doing maybe next year, but this was a really good learning experience for me.
I can't say enough about the upper I got from farmer rick, compare next to a buddies colt, its every bit as nice.
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