I am a newbie on this forum who has just purchased a Sport II with the A2 front sight. Planning to zero it this week and picked up a four pin front sight tool made by Wheeler in case the front sight needed any adjustment. Supposed to be a standard sight tool for A2 front sight but it is slightly too big in diameter to fit between the sides of the sight on my rifle. Does the Sport II require a special tool or do I have either a sight or tool that is out of spec? Thanks for any help you can offer.

I have always used the tip of a .223 round depressing the plunger rotate the pin one click

Standard sight tool should work fine, I used a polymer magpul one and it fits perfectly.

I will likely have to do that. Just hoping to easily find out what is non standard in my case.

I have a feeling that the side posts on my front sight are too close together. If so, zeroing the rifle might be fun if the sight post is a little off.

Hopefully you won't have to mess with it. My Sporter was perfectly zero'd for elevation at 25yd.

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Registration? NEVER!

The best tool is the tip of a bullet, preferably a ball round. You'll always have one and not have to worry about losing it somewhere.

Really? You think the front sight is more likely to be out of spec than a $6 tool? Use the tip of a bullet as suggested... I bet you won't have any trouble sighting in the rifle.

I am basing that thinking on the sight picture I get when handling the rifle. I thought it was probably due to my eyesight or how I was placing my eye behind the peephole and that I would just have to get used to the view. I can't seem to get both side posts to line up equidistant from the center post. They seem to be in alignment with each other when just looking at the front sight only. Haven't tried measuring with a caliper to verify that. Probably is just an optical illusion caused by my eye placement. I need to get to a range ASAP. That has been a problem around here lately.

As you say, it probably will not be an issue in getting the rifle zeroed. Should be no problem using the bullet tip of a round to make any adjustments, if necessary.

The front sight post needs to be centered in your rear sight If the PROTECTIVE wings on your front sight are not even, it doesn't matter.
Sure, it's nice if they are perfectly spaced/ not bent. But if they are, it doesn't matter. The tip of the front sight post is what matters.
Notice I said "Protective"? That's what those ears on your FSP is for. To protect the FSP.

That's what I am thinking also. Need to get it to a range and I'll feel better. I will be adding a red dot scope anyway but for now I'm overthinking the details in anticipation of sending some rounds downrange with the rifle.

My RUGER AR-556 came with a front sight adjustment tool.

Glad to see Ruger include the tool, which I believe also works for their rear sight. The Ruger AR-556 is a very nice rifle that was one of the three I decided among before selecting the M&P-15 Sport II. The modifications they made with the A2 sight might well be improvements. I liked the fact that the S&W was Mil-Spec in more areas as well as the S&W Warranty. If I was planning on shooting hevier rounds for accuracy I might've bought the Colt Expanse with it's 1:7 twist. The Ruger's 1:8 seemed like a good compromise and almost swayed my decision in it's favor. Wanting only combat accuracy and knowing I will likely shoot mostly 55-62 gr rounds the 1:9 twist of the Sport II might turn out to be the best choice.

I called S&W today and they verified that the front sight on the Sport II is a Mil-Spec A2 sight. I took the tool I purchased, which is designed for a Mil-Spec A2 sight, to a LGS and tried it with another Sport II plus a couple of other AR type rifles with A2 sights. It worked with them but needed to be used in a precise way. It has to be angled, with the bottom angled forward at about a 45° angle and inserted from the rear of the sight. One of the teeth has to be inserted into the rear hole on the sight before tilting it forward so that the frontmost tooth engages the pin on the front part of the sight. Using the same process when I got home I was able to attach it to the front sight on my M&P-15 Sport II. Mine just seemed like a tighter fit than the other AR's from the store. If the tool was designed to work that way the manufacturer should provide instructions saying so.

It's good to now know the specifics on the front sight. Not overwhlmingly happy with the sight tool but at least I know how it works. Now I wonder if any of the other sight tools available work in the same manner.

Sw/JAG,
I have noted that on all of my supposedly mil-spec front sights that it was very difficult to use a bullet tip. The slots on the psot or the diameter of the base... I don't know. All I know is, the FSPs on my USMC issued rifles were very easy to use a bullet tip for adjustment.
So this is something that you figured out, and now you can shoot that piece, sight it in, and have some fun.
Go for it!

My new sport AR15 came with a adjustment tool also.