Precision Firearms upper to tight to fit lower RR lower AR15
#11
Klem Wrote:In your shoes I would buy either a billet or forged stripped lower from PF and make it a set. Their billet is $200 and the Forged is only $100, plus another, say $50 for transfer to a FFL Dealer and postage. Then populate the lower with parts or swap the parts over from the RRA lower. Both the PF forged and billet lowers are 7075 grade aluminium so best quality and your Ferrari upper is crying out for a similar quality lower. It will sell quicker if the receiver is a matching set.

After you've filed the lugs on that upper it won't be as tight a fit but this can be offset by screwing in tight the Upper-to-lower tension screw.

You will end up paying for someone else's lower anyway so you may as well source the PF lower for best fit.

The anodizing will be shaved off where you filed the lugs and this needs to be disclosed when you sell it. Unfortunately some buyers will see that as damage. A PF lower will likely still be a tight fit and this will help.

well, it would not fit at all. neither upper lug would even start to insert into the lower. So I already took off the black paint from both side of the upper lug and it fit good and a little tight now into the his RR lower. lock up was tight also. we did not paint or anodize the upper lugs and left them as they are. it was already sold - he was there when we did it. thanks for all the info.
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Precision Firearms upper to tight to fit lower RR lower AR15 - by soddyjohn - 02-17-2018, 02:58 PM

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