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6/25/2012 4:38:40 AM EDT
I just received my new barrel. I noticed that there are no cuts for the FSB pins.  It there a jig for this or is it something I should have a smith do?
6/25/2012 5:04:58 AM EDT
[#1]
FSB and barrel gets drilled and taper reamed at the same time. So yes you need a jig, or pay a smith.
6/25/2012 9:06:50 AM EDT
[#2]
Buy a clamp on version and be done with it.
6/25/2012 9:49:21 AM EDT
[#3]
Quoted:
Buy a clamp on version and be done with it.


Do they loosen up over time?  I would hate to have a floating FSB.  Murphy's law dictates that it would come loose when I need it most.
6/25/2012 10:00:12 AM EDT
[#4]
Quoted:
Quoted:
Buy a clamp on version and be done with it.


Do they loosen up over time?  I would hate to have a floating FSB.  Murphy's law dictates that it would come loose when I need it most.

There seems to be 4-5 camps on securing an FSB

Taper pins
Clamp-on
Set screws with machined flats
Set screws

Will they loosen over time ?
Hard to quantify that....depends on quality of install and how severe the usage.
If it's a weapon that your life depends on go with pins.

6/25/2012 10:01:02 AM EDT
[#5]
The first AR I ever bought has a clamp on front sight and it is still holding zero. There are folding front sight blocks too if you're worried about a fixed front sight taking a hard blow. More shown here. You could use a low profile gas block and a fixed or folding front sight attached to a free float hand guard. That's what I prefer to do.

If this will be a duty rifle then it would probably be recommended to have pins installed.
6/25/2012 10:50:37 AM EDT
[#6]
Quoted:
Quoted:
Buy a clamp on version and be done with it.


Do they loosen up over time?  I would hate to have a floating FSB.  Murphy's law dictates that it would come loose when I need it most.


I would stick with this thinking personally.
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