AR10 Port Door Shaft

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14 years 9 months ago #3200 by huntenthusiast
AR10 Port Door Shaft was created by huntenthusiast
According to ArmaLite, the only difference between the A4 and 10T uppers is the length of the port door shaft. The 10T is 3/16" longer. In either case the shaft rests on the standard handguard ring(A4) or the free float ring(10T)which is further forward by said 3/16". Can I safely assume the reason the shaft would come out is from recoil? Has anyone freefloated an A4 upper without changing the shaft and not encountered problems?

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14 years 9 months ago #3203 by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re:AR10 Port Door Shaft
I know "Milspec" swapped out his for a Factory SASS free float, you might send him a note and see if he has had any issues....sorry can't be much more help than that....
BMS

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14 years 9 months ago #3204 by huntenthusiast
Replied by huntenthusiast on topic Re:AR10 Port Door Shaft
Thanks BMS, I did. I'll let you know what I find out.

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14 years 9 months ago #3210 by huntenthusiast
Replied by huntenthusiast on topic Re:AR10 Port Door Shaft
Hey BMS, Milspec said he changed out the port door shaft for the longer one which is what I'm gonna do. May as well do it right the first time.

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14 years 9 months ago #3212 by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re:AR10 Port Door Shaft
Hey I am glad he had the answers for you....let us know how it turns out... :)
It is a good thing to know, will have to put that in the file so if I ever swap out mine I know I have to change it....Thanks.
BMS

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14 years 8 months ago #3225 by mrraley
Replied by mrraley on topic Re:AR10 Port Door Shaft
I've changed my regular handguards to ff tube, and from experience, you need the longer port door rod.

If not, when shooting that 3/16" will let the rod slip out just enough that the door will hang there with no spring tension.
The following user(s) said Thank You: jtallen83

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