WTB ar-15 sight like this

[CA_AR-15_925]

anyone have one for sale???????

[mcholak]

Go to any of the sites that sell parts, which is an exhaustive number and look at gas blocks. Pretty sure you'll find more options that you can believe or want!

[ty423]

I DO!!!! I think its a .75 inch size.. Its called a front sight base hence FSB I have one that came off a Stag M4 profile barrel. I even have the optional side sling mount that goes with it. I have all the pins too. Find out what barrel size yours is.

If you want it I can go check and make sure I still have it. I haven't seen it in awhile but I did try to sell it awhile back along with a bunch of other things.

[dachan]

Usually the FSB is installed onto the barrel, then the holes for the pins are drilled. Some manufacturers use tapered pins, others use straight pins. There is a good possibility that a FSB taken off of one barrel will not fit onto your barrel. You might try looking for a FSB that clamps on rather than using the pins, or use a new FSB (similiar to those pictured below) and redrill the holes.

[vega]

Used one will work but you have to tap the holes using 8-32 size tap and buy set screws. If this is wrong I want to know too.

[dachan]

Used one will work but you have to tap the holes using 8-32 size tap and buy set screws. If this is wrong I want to know too.

That'll work also; drill and tap through the bayo lug and under the swivel. Seen some FSB sold that way, and marketed with the added benefit of being windage adjustable. The set screws hold better if the barrel was previously drilled for pins, and the set screws dig into the mess left behind.

[JagerTroop]

Used one will work but you have to tap the holes using 8-32 size tap and buy set screws. If this is wrong I want to know too.

I have done this on numerous occasions and it works great.