Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
6859 Online
bravocompany bravocompany bravocompany
brownells brownells
tnvc tnvc tnvc
AR15.COM
bravocompany
Login / Register
bravocompany bravocompany bravocompany
brownells brownells
tnvc tnvc tnvc
RS
OSIGHT
GS
palmetto
brownells
aim
cz
springfield
primaryArms
geissele
magpul
JRH
bravocompany
skd
Guns
midwest
colt
silencerShop
fightlite
Holosun
vortex
6859 Online
magpul
springfield
fightlite
primaryArms
aim
GS
Guns
bravocompany
colt
cz
skd
vortex
silencerShop
OSIGHT
Holosun
JRH
palmetto
brownells
RS
midwest
geissele
Site News Shot by His Own Brother? Evansville Crime Audit
Sponsor News TNVC's Labor Day Sale still ongoing - Site Wide Savings - Don't miss out!
11/5/2017 4:45:08 PM EDT
I purchased a flat top M4 style upper back around 2006 and I just noticed it did not come with an F marked fsb. Did these old uppers come with the extended front sight post or will I need to buy one in order to use a buis? 

Thanks
11/7/2017 3:50:04 PM EDT
[#1]
You're good to go.
Different forging house for the front sight housing which didn't use the "F" on their forging, even though they are"F" height.
Steve/RRA

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Register to Reply

Already a member? Sign In

LAPG
geissele
THBRD
palmetto
silencerShop
ar15com
blackhills
ar15com
Pro2A
LAPG
springfield
bravocompany
RS
fightlite
primaryArms
colt
brownells
Faxxon
gray
ar15com
cmmg
SAS