richc
NES Member
I've built a number of AR's so I know the drill. Not my first rodeo.
I'm making some "demo" AR-15's for a product I'm working on. I figured I'd use 80% lowers to reduce the likelihood I'd need to bring a fully functioning AR into a business or potential customer location. Or to make it ease to mail it to someone.
I've made a demo AR-15 in the past with no issues. Now I'm finding that the lower and upper receivers don't mate properly. The rear takedown pin appendage on the upper receiver can't fit in the mating hole in the lower. Peeking in there with a flashlight it's obvious there's a difference in size.
Has something changed with AR lowers? I've tried two different mfr's and have the same problem. But not so with my older 80% lower.
I suspect I'll just dremel out the lower receiver mating hole some. But I'm wondering why I'm having this new problem. And for the record all the uppers work fine in a regular AR-15 lower receiver. The problem is definitely with the 80% receiver.
Thanks
Rich
I'm making some "demo" AR-15's for a product I'm working on. I figured I'd use 80% lowers to reduce the likelihood I'd need to bring a fully functioning AR into a business or potential customer location. Or to make it ease to mail it to someone.
I've made a demo AR-15 in the past with no issues. Now I'm finding that the lower and upper receivers don't mate properly. The rear takedown pin appendage on the upper receiver can't fit in the mating hole in the lower. Peeking in there with a flashlight it's obvious there's a difference in size.
Has something changed with AR lowers? I've tried two different mfr's and have the same problem. But not so with my older 80% lower.
I suspect I'll just dremel out the lower receiver mating hole some. But I'm wondering why I'm having this new problem. And for the record all the uppers work fine in a regular AR-15 lower receiver. The problem is definitely with the 80% receiver.
Thanks
Rich