WTT: 20" A4 Upper for 16" Carbine Length M4 Profile Flattop Upper

[NWIeng]

Just looking for a straight swap. Looking to trade a flat top 20" upper (government profile) for a 16" carbine length m4 profile upper.

Any out there looking to swap, please PM me to discuss details, ask questions, etc..

Barrel is marked 3S679 MP 5.56 NATO 1:7, apparently the 3S679 means FN from what I've found.

http://i705.photobucket.com/albums/ww54/NWIeng/Upper%20Pictures/IMG-20120101-00152.jpg
http://i705.photobucket.com/albums/ww54/NWIeng/Upper Pictures/IMG-20120101-00148.jpg
http://i705.photobucket.com/albums/ww54/NWIeng/Upper Pictures/IMG-20120101-00145.jpg
http://i705.photobucket.com/albums/ww54/NWIeng/Upper Pictures/IMG-20120101-00144.jpg
http://i705.photobucket.com/albums/ww54/NWIeng/Upper Pictures/IMG-20120101-00143.jpg

Location is Lake County, but figure this could be an easy swap to ship too, given no FFL items.

Thanks for looking!

 

[NWIeng]

BTT

 

[NWIeng]

Btt, pics added

 

[j706]

Who is the manufacturer and what is the twist rate on the barrel? Round count?

 

[NWIeng]

btt