AR 15 front sight housing replacement

utaherrn · June 28, 2005, 09:00 PM

I have a Colt AR-15 H Bar 1/7 bbl with threaded muzzle, but no bayo lug on the front sight housing (FSH).

I want to change out the FSH without lug to one with the bayo lug if for no other reason than it's an irritating reminder of the AWB.

I have assembled AR lowers several times but have never messed around with this. Will I need a particular FSH other than the 0.75" ID type?

Is it easy to do, just drift out the pins, etc., or are there quirks I should know about?

Any help appreciated. I'm pretty handy but don't want to get in over my head/mess anything up.

Thanks.

DnPRK · June 29, 2005, 10:30 AM

It's easy to get the old one off by driving out the pins, but installing a new one is tough because the pin holes will not be in the same place on the new FSH. If not done correctly you will have a canted FSH.

Instead of installing pins, drill and tap the pin holes and install 4 set screws. Take the rifle to the range and get the FSH centered by losening screws on one side and tightening on the other. Once centered, secure the FSH using green Locktite (the wicking kind) and let cure 24 hours.

utaherrn · June 29, 2005, 03:08 PM

thanks much

June 28, 2005, 09:00 PM	#1
utaherrn Senior Member Join Date: March 16, 2005 Location: Happy Valley, USA Posts: 649	AR 15 front sight housing replacement I have a Colt AR-15 H Bar 1/7 bbl with threaded muzzle, but no bayo lug on the front sight housing (FSH). I want to change out the FSH without lug to one with the bayo lug if for no other reason than it's an irritating reminder of the AWB. I have assembled AR lowers several times but have never messed around with this. Will I need a particular FSH other than the 0.75" ID type? Is it easy to do, just drift out the pins, etc., or are there quirks I should know about? Any help appreciated. I'm pretty handy but don't want to get in over my head/mess anything up. Thanks.

June 29, 2005, 10:30 AM	#2
DnPRK Senior Member Join Date: August 24, 2001 Location: LC, Ca Posts: 1,917	It's easy to get the old one off by driving out the pins, but installing a new one is tough because the pin holes will not be in the same place on the new FSH. If not done correctly you will have a canted FSH. Instead of installing pins, drill and tap the pin holes and install 4 set screws. Take the rifle to the range and get the FSH centered by losening screws on one side and tightening on the other. Once centered, secure the FSH using green Locktite (the wicking kind) and let cure 24 hours.

June 29, 2005, 03:08 PM	#3
utaherrn Senior Member Join Date: March 16, 2005 Location: Happy Valley, USA Posts: 649	thanks much