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AR15.COM
2/8/2006 3:50:32 PM EDT
My 6721 came with a full auto carrier

My 6933 came with a full auto carrier also

My 6921 came with the "flat", no shroud at all carrier.

I don't (yet) have any rounds through these guns.  Should I swap the 6721 full auto carrier into the 6921, and the "flat" into the 6721, since the 6721 is the more "common" of the weapons?  Or should I just let them ride as they arrived from the factory?  If I do swap the carriers can/should I swap the bolt also, or leave the bolt.  I am ASSuming that headspacing isn't really an issue as all are brand new with no rounds through them.  Any thoughts would be appreciated.
2/8/2006 4:03:20 PM EDT
[#1]
I would get a full-auto carrier for the 6921, luckydog - and surprised it didnt come with it.



All of those models will perform better with the '16 carrier

(Nice line-up, BTW!)

eta- keep the same bolt in each gun

once they have some rounds through them, it will be more important. To switch now, will not matter.

2/8/2006 6:49:37 PM EDT
[#2]
Bolts stay w/ rifle,  carriers can move at will.

I'd leave them alone, or but the protected firing pin model in the rifle you plan on to shoot the most.
2/10/2006 6:08:16 AM EDT
[#3]

Quoted:
I would get a full-auto carrier for the 6921, luckydog - and surprised it didnt come with it.

All of those models will perform better with the '16 carrier

(Nice line-up, BTW!)

eta- keep the same bolt in each gun

once they have some rounds through them, it will be more important. To switch now, will not matter.



+1
2/11/2006 2:47:03 PM EDT
[#4]
Thanks guys, that's what I thought
2/11/2006 4:44:40 PM EDT
[#5]
The 6921 was probably around a lot longer than the others before sale. . . .
2/12/2006 3:33:47 AM EDT
[#6]
Yes,  It was stamped 9/04 I believe on the barrell, the others were '05 production