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AR10 Port Door Shaft

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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?
14 years 1 month ago #3200

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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 1 month ago #3203

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Replied by huntenthusiast on topic Re:AR10 Port Door Shaft

Thanks BMS, I did. I'll let you know what I find out.
14 years 1 month ago #3204

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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.
14 years 1 month ago #3210

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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
It is better to have and not need, than need and not have.

If you think it is time to bury your guns, it is time to dig them up....


"Fight back! Whenever you are offered violence, fight back! The aggressor does not fear the law, so he must be taught to fear you. Whatever the risk, and at whatever...
14 years 1 month ago #3212

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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.
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14 years 1 month ago #3225

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