AR Sponsor
Posted: 5/30/2012 1:31:56 PM EDT
|
Finishing my third build with a RRA lower and I thought RRA upper. I have attached the upper to the lower with the pivot pin but the rear pin is not wanting to go in. I could force it but that just seems wrong. Should I try a new rear pin or do something else? Posted Via AR15.Com Mobile |
|
RRA is known for this. It is the main reason I won't buy from them.
I believe they recommend hitting it with a rubber mallet on the flat top while pushing the pin in. Can't remember exactly, it is tacked up on top of the troubleshooting or matainace section... Sorry, I'm on my phone at the moment and it's rough to link. |
|
Me personally, I would try to figure out which of the two (upper or lower) is out of spec and replace it.
Forcing the pin in, if the holes are not aligned within tolerances can (not will) cause damage and then you may not be able to get them apart again without causing more damage. If you don't want the hassle or can't afford replacement, take them both to someone competent with a mill to 'drill' through the take down side. You will weaken this area but only slightly and if it is only a couple hundredths 'off' probably not enough to matter, YMMV. |
|
Quoted:
RRA isn't known for out of spec parts just really tight tolerences you might need to oil some of the parts and then try putting together then keep going by doing the same thing over and over until even. Eh, out of spec to who's standards? In my opinion, if I need a tool to field strip then it is unacceptable and thus "out of spec" RRA is known for parts NOT fitting with others, their tolerance spec is too tight. |
|
Quoted:
Quoted:
RRA isn't known for out of spec parts just really tight tolerences you might need to oil some of the parts and then try putting together then keep going by doing the same thing over and over until even. Eh, out of spec to who's standards? In my opinion, if I need a tool to field strip then it is unacceptable and thus "out of spec" RRA is known for parts NOT fitting with others, their tolerance spec is too tight. I don't think you read my post correctly I said they AREN'T known to be out of spec but REALLY TIGHT tolerences |
|
Quoted:
Quoted:
Quoted:
RRA isn't known for out of spec parts just really tight tolerences you might need to oil some of the parts and then try putting together then keep going by doing the same thing over and over until even. Eh, out of spec to who's standards? In my opinion, if I need a tool to field strip then it is unacceptable and thus "out of spec" RRA is known for parts NOT fitting with others, their tolerance spec is too tight. I don't think you read my post correctly I said they AREN'T known to be out of spec but REALLY TIGHT tolerences That's his point, the only spec they are holding are their own, so in comparison with the industry that strives for "mil-spec", in that regard, rra is out of spec. |
| Having read the tacked post in the other section and looked at the gun, I am very satisfied both with the answers here and the fit that I have been able to get. I really like the close fit and the pin fit is no longer objectionable. Thanks to all for contributing. |
|
Squeeze the tail of the two receivers together when you are dis- or assembling them, the pin should move a little easier.
All my uppers and lowers are a little snug and I have to squeeze 'em to move the takedown pin. Just like when you release a lever parking brake in a car, pull up on it before pushing the button to unload the sliding faces. Joe |
AR Sponsor