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Building first AR15

The only time you use anti walk pins is if you use a pre maid drop in trigger. On a standard trigger it's the springs that holds the pins in. With a drop in trigger unit there are no springs to retain the pins. You must use anti walk pins in that situation but those anti walk pins are included with the trigger most of the time.
 
I dont have a problem with Aero receivers at all. The only problem I have is they are too expensive on their website. You can get them much cheaper at other retailers. They make for a solid foundation. I don't use anything else from them except maybe gas tubes. I used a set of their M5 AR-10 receivers and I am impressed with those. I have used maybe three sets over the years but the only set I have now is on my AR-10 in 308. Nothing wrong with those at all. My only gripe is their prices. They went up exponentially over the last few years.
 
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