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I’ve seen so many great tips on this site and wanted to share one. This might be so basic and everyone already does it, but if not, here goes.
After loosing a couple rear takedown detent springs when I removed the receiver extension/buffer tube, I came across a helpful tip of inserting a small set screw in the hole on the back. Some higher-end manufacturers already do this, and some 80% receiver are using a set screw for the bolt catch pin.
It is simple enough to tap the spring and detent hole on the back of the the lower and insert a set screw to keep the detent and detent spring in place. I use a 4 X 40 thread tap and a 1/8” long set screw. After threading the hole, shoot a bit of compressed air in the hole to remove any filings. I don’t use any threading oil since pretty quick and not cutting that far. I also don’t worry about touching up the exposed aluminum, but it is simple enough using Beachwood Casey Aluminum Black if desired. I do trim about 1/8” off the detent spring or it gets a bit difficult to get the set screw started.
This allows me to have one less thing I’m crawling around the garage floor looking for. Amazing the small parts I find 6 months sometimes even a year after I lost them, but never what I’m currently trying to find.
After loosing a couple rear takedown detent springs when I removed the receiver extension/buffer tube, I came across a helpful tip of inserting a small set screw in the hole on the back. Some higher-end manufacturers already do this, and some 80% receiver are using a set screw for the bolt catch pin.
It is simple enough to tap the spring and detent hole on the back of the the lower and insert a set screw to keep the detent and detent spring in place. I use a 4 X 40 thread tap and a 1/8” long set screw. After threading the hole, shoot a bit of compressed air in the hole to remove any filings. I don’t use any threading oil since pretty quick and not cutting that far. I also don’t worry about touching up the exposed aluminum, but it is simple enough using Beachwood Casey Aluminum Black if desired. I do trim about 1/8” off the detent spring or it gets a bit difficult to get the set screw started.
This allows me to have one less thing I’m crawling around the garage floor looking for. Amazing the small parts I find 6 months sometimes even a year after I lost them, but never what I’m currently trying to find.
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