Help mating upper and lower...

Are you having problems with a rifle or handgun? Having problems with a magazine? This is the place to post for help or to help others. If you fixed that nagging problem with your AR-15, this is the place to post how you did it.
Toy00taco
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Re: Help mating upper and lower...

#16

Post by Toy00taco »

Did you ever figure this out? Did Fostech ever get back you you? If you still haven’t figured it out post the video you sent them or maybe a pic of the setup could help us determine what the issue is.


Toy00taco
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Re: Help mating upper and lower...

#17

Post by Toy00taco »

Any update on this? If you have found the fix it might come in handy to have it posted on the forum in case someone else has a similar issue down the road.
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Lwstarks
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Re: Help mating upper and lower...

#18

Post by Lwstarks »

I just sent it off to fostech yesterday. It is a wait and see now.
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mock0013
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Re: Help mating upper and lower...

#19

Post by mock0013 »

I think I had to remove the front and rear pin and work mine to get it together.. I haven't pulled it apart in ages. guess I need to do some cleaning.
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Re: Help mating upper and lower...

#20

Post by Toy00taco »

Thanks for the update, too bad you had to send it back and it wasn’t just a simple fix. Keep us posted with how Fostech resolves this for you.
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Lwstarks
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Re: Help mating upper and lower...

#21

Post by Lwstarks »

I found out that the buffer tube was in one turn too many. After it was backed off, guess what, closed like it should. In fact i can slap any upper to it now. I took it to casa grande and worked like it should with both the 9mm and 5.56 uppers.
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792mauser
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Re: Help mating upper and lower...

#22

Post by 792mauser »

Good to hear that it was a simple and easily fixed problem.
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muta4warrior
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Re: Help mating upper and lower...

#23

Post by muta4warrior »

Lwstarks wrote: May 13th, 2020, 1:34 pm I found out that the buffer tube was in one turn too many. After it was backed off, guess what, closed like it should. In fact i can slap any upper to it now. I took it to casa grande and worked like it should with both the 9mm and 5.56 uppers.
I called it back in March... :mrgreen:
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baja
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Re: Help mating upper and lower...

#24

Post by baja »

^ Yup, you did. Good Job.
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