[sgttessnc]

what is the purpose of the small spring the extends from the lower receiver when you replace the end plate on an AR?

is it necessary?

where can you buy a replacement and what is it's actual name?

thank you

[mjkeat]

It keeps your rear take down pin from vibrating out. W/O it your recievers will seperate and pivot on the front take down pin.

[kenhesr]

Are you also missing the take down detent? The detent spring is #11 on the parts list. If you don't have the detent that is #12

Look Here Del-Ton, Inc. AR-15 Lower Parts - Standard

Don't feel too bad, I've launched several into low orbit! Ken

[sgttessnc]

thanks for the info and the nomenclature and source. I will have to order even more rifle parts.

[kenhesr]

You are VERY welcome and I forgot, Welcome to the forum!!! Ken

[sgttessnc]

thanks for the link

[Txhillbilly]

Don't you just love it when those little springs fly out,and are never to be found again in a room in your house.
I don't think there's a person on earth that has assembled or worked on an AR,that can say they haven't ever lost a few springs and detent pins!

[wooleybooger]

i didnt lose mine. it crawled out from under the table the day after the replacement came in the mail.