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5/24/2004 11:53:30 AM EDT
B K on an A2 Upper receiver at the sight.

MMS on an A3 Upper receiver.

SS 556 on a barrel just ahead of front sight base.

556 on a barrel just ahead of front sight base.

Triangle over a Block M on an A2 upper receiver.  (also a 3 or a B)

An L on the base of a A2 peep, where the 0-2 usually is.

Thanks a lot, everyone!!


5/24/2004 12:22:17 PM EDT
[#1]

Quoted:
B K on an A2 Upper receiver at the sight.

MMS on an A3 Upper receiver.

SS 556 on a barrel just ahead of front sight base.Stainless Steel 5.56 caliber

556 on a barrel just ahead of front sight base.caliber

Triangle over a Block M on an A2 upper receiver.  (also a 3 or a B)

An L on the base of a A2 peep, where the 0-2 usually is.

Thanks a lot, everyone!!



5/24/2004 1:25:35 PM EDT
[#2]
Appreciate that, but wondered if there was a particular maker associated with those caliber marks.
5/24/2004 2:13:09 PM EDT
[#3]
BK likely Bushmaster.

Barrels with 556 or 556 SS are likely Olympic.

Triangle over a block "M" - could this be the splintered "A" of Anchor Harvey?? - could be Olympic, Bushmaster (and others I believe) - not sure of the "3" or "B" if it is an Anchor Harvey - have seen this on carry handles "A3" or "AB".

L on sight aperture - older designation for long range peep???.

Never saw or heard of an "MMS" A3 receiver, can't even guess at that one.

More help may be on the way from others.
5/24/2004 2:42:02 PM EDT
[#4]
Mongo...thanks a lot...great help....
5/25/2004 1:45:14 PM EDT
[#6]
The aperture with the "L" is an A1 aperture.  Same size holes, different offset.
5/26/2004 7:05:58 PM EDT
[#7]
I believe the A3 MMS upper may be Mega Machine Shop Inc. (WA). www.carricozarmory.com/megamachineshopinformation.htm
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