New to M&P 15 Sport (AR's in general)

[MichiganScott]

You want the bell of the scope (front end), as close to the barrel/hand guard as you can get it with out touching for best results. ALSO, check your eye relief so you don't have any dark shadows when looking through the scope. On mine, the rear of the scope sits almost flush with the back of the rear iron sight and charging handle.

Gotta disagree. The removable sights on a flat top place the line of sight at 2.6 inches above the bore and the older carry handle upper placed the line of sight 2.8 inches up. This is due to the straight line design of the gun.

If the OP removes the riser, the current mount will place the reticle of the scope at about that height. If he changes the mount and gets the scope as close to the barrel/handguard as possible, the line of sight will be less than two inches. Most people have difficulty getting a proper cheek weld at that height, plus the wide portion of the front sight tower will be in the line of sight. The magnification will wipe it out for most practical purposes, but it cuts down on the amount of light coming through the scope. You do not have to have the scope above the sight tower.

Correctly, the scope should be mounted far enough forward that the ocular is about even with the rear of the receiver. That allows easy access to the charging handle and the shooter can get into a proper squared off position when shooting without getting the scope in the eye or the blackout Max mentions.

 

[MrG5122]

Those Nikon rings will work fine without the riser. I have the M-223 one-piece rings and originally installed a riser like that wrongly thinking I needed to get the line-of-sight above the front sight. The scope was too high to get a good cheek weld. Now I have a nice riser in my spare parts box along with alot of other parts mistakes I've made. Most of them offering no ultimate advantage, only more weight.

As far as forward and back goes, that is determined only by the eye relief of the particular scope being installed. An extended charging handle may be needed if the scope ends up far enough back to interfere with that operation.

 

[OS-Wiz]

It seams like that green dot would be better if you were to roll it 45 degrees right to get it closer to the bore. I guess if you were shooting really close you would be ok.

Hmmm, I've got a 45 degree mount I could mount the green-dot on just in front of the scope mount. Might give it a try; thanks!

 

[wagostini]

Those Nikon rings will work fine without the riser. I have the M-223 one-piece rings and originally installed a riser like that wrongly thinking I needed to get the line-of-sight above the front sight. The scope was too high to get a good cheek weld. Now I have a nice riser in my spare parts box along with alot of other parts mistakes I've made. Most of them offering no ultimate advantage, only more weight.

As far as forward and back goes, that is determined only by the eye relief of the particular scope being installed. An extended charging handle may be needed if the scope ends up far enough back to interfere with that operation.

The reason I even added that riser is because I was having issue looking down the scope with my over ears on. I have a wider face than some so getting that sight just right was my concern.

 

[MichiganScott]

The reason I even added that riser is because I was having issue looking down the scope with my over ears on. I have a wider face than some so getting that sight just right was my concern.

My wife has the same problem with any rifle, be it her bolt gun or her AR. She uses earplugs with her rifles and muffs with her handguns.

 

[Shootingfun]

Hello Guys!

Like the title says, I am new to the AR platform and I have very little clue what I am doing. I know I want an optic sight on my sport but the issue that I am having is the Front Sight sits too high. I want to remove it and get a new gas block, but I am worried about buying the wrong piece. I want to exchange the heat shield eventually for one that has a quad rail. I know I am over thinking about things that I am going to do with it... I call it excitement. I just need that front sight gone (I am not a fan of iron sights).

Help me please!

I am looking at the Nikon Optics
Amazon.com : Nikon ProStaff 4-12 x 40 Black Matte Riflescope (BDC) : Rifle Scopes : Sports & Outdoors

I have had my M&P 15 Sport for like 2 yrs now and lost count of how many rounds I have put threw it. I have also lost count of how many times I have changed the furniture on it and other items. This rifle has had several different optics on it and sight systems, I have even had a vortex system on it but sold all that and went with what you see in the pics I posted. I still have hand guards just setting in drawers and other AR Lego's setting around the house not being used.
So I went with what you see in my pics and love it. Finally have to say that this rifle is where it is going to stay.
There is some AK candy there for ya too!!
I myself after all the stuff I purchased, is to keep it simple and natural use that extra money for ammo. Get used to your rifle out of the box first, then decide where you want to got with it after shooting it for awhile. If you are going to get a optic, pay for it, you can only get a good optic for what you pay. I did like the Vortex system that I did have for a short time. I sold the light I had for it all the Magpul stuff that I bought except the CTR butt stock and BAD lever and grip. Also ask yourself what role is this rifle going to play, range rifle, hunting, self defense or a combo of all.
List of features on my M&P 15 sport:
1. UTG Pro series drop carbine slim line hand guard with 3 rails
2. UTG Pro hand guard stop kit
3. UTG Bi-pod (Reviewed by Nutafancy)
4. Aimsports carry handle
5. DPMS extra large safety lever
6. DPMS Jerry Miculek Muzzle brake
7. Magpul MOE+ grip
8. Magpul MOE CTR butt stock
9. BCM L4 charging handle
10. BCM extractor and spring kit
11. BCM firing pin
12. Magpul BAD lever

 

[wagostini]

I have had my M&P 15 Sport for like 2 yrs now and lost count of how many rounds I have put threw it. I have also lost count of how many times I have changed the furniture on it and other items. This rifle has had several different optics on it and sight systems, I have even had a vortex system on it but sold all that and went with what you see in the pics I posted. I still have hand guards just setting in drawers and other AR Lego's setting around the house not being used.
So I went with what you see in my pics and love it. Finally have to say that this rifle is where it is going to stay.
There is some AK candy there for ya too!!
I myself after all the stuff I purchased, is to keep it simple and natural use that extra money for ammo. Get used to your rifle out of the box first, then decide where you want to got with it after shooting it for awhile. If you are going to get a optic, pay for it, you can only get a good optic for what you pay. I did like the Vortex system that I did have for a short time. I sold the light I had for it all the Magpul stuff that I bought except the CTR butt stock and BAD lever and grip. Also ask yourself what role is this rifle going to play, range rifle, hunting, self defense or a combo of all.
List of features on my M&P 15 sport:
1. UTG Pro series drop carbine slim line hand guard with 3 rails
2. UTG Pro hand guard stop kit
3. UTG Bi-pod (Reviewed by Nutafancy)
4. Aimsports carry handle
5. DPMS extra large safety lever
6. DPMS Jerry Miculek Muzzle brake
7. Magpul MOE+ grip
8. Magpul MOE CTR butt stock
9. BCM L4 charging handle
10. BCM extractor and spring kit
11. BCM firing pin
12. Magpul BAD lever

I like your guns! Love the furniture on your AR. I am limited by my state when it comes to stocks, MA will not allow any folding or telescopic stocks (fixed only). Also they are big into the 10-round mags maximum as well, unless you find "Pre-Ban" magazines. The last thing I ordered was a quad rail that a member of this site recommended I should try. Beyond that, the scope and the quadrail is all I'm going to do. I wanted to change out the gas block but I can't see it through the sight so I'll keep it there. I removed the riser as well.

 

[Shootingfun]

Sport

Most optics look past the A2 front sight post or work with it. I didn't modify mine that much due too warranty with Smith& Wesson. The rifle has a lifetime warranty on it and if you do any major work like remove the sight post or anything else there goes the warranty if you have to ship it in.
I asked and they said muzzle brake hand guard as long as a drop in style, pistol grip butt stock etc. That was all fine and will not void the warranty. This is what S&W told me. I still have all the original furniture for it and GI Flash hider.
Thanks for the comment, this took way to much money to finally get it where I want.
Cannot wait to see some pics of your when you get it where you want, I am sorry you live in controlled America, here in Indiana its all good.

 

[Shootingfun]

I used a Burris 1/2" raiser in order to clear the front sight. It kinda worked but it increases the bore to sight distance (scope height) which can cause a lot of frustration, especially since you have more screws to tighten and make sure they stay tight.

My personal opinion; if you like to use a scope on an AR type rifle get one with a gas block in the front. Get a quality base and scope. You even can add a 45 degree back up sight in case you have to shoot shorter distances.

If you want to keep the A2 front sight just get a carry handle. This is good enough for shooting out to 100yd. I'm sure many people are very accurate beyond 100yd using iron sights, depending on the target size...

I did just that, got tired of optics and went old school with the carry handle.

 

[Rastoff]

Most optics look past the A2 front sight post or work with it. I didn't modify mine that much due too warranty with Smith& Wesson. The rifle has a lifetime warranty on it and if you do any major work like remove the sight post or anything else there goes the warranty if you have to ship it in.

Changing out the A2 sight/gas block will not void the warranty. If you look at the warranty, you will find this statement:

Defects or malfunctions resulting from careless handling, unauthorized adjustments or modifications made or attempted by anyone other than a qualified gunsmith following Smith & Wesson authorized procedures, or failure to follow the disas-sembly instructions in the Smith & Wesson manual.

This says that defects or malfunctions caused by modifications are not warranted. It is very unlikely that changing the gas block will cause any issues. It's almost impossible to do it wrong.

Secondly, I don't see the "lifetime" part of this warranty. It clearly says:

Smith & Wesson firearms are warranted to be free from defectsin material and workmanship. Any such defects of which Smith & Wesson receives written notice within one year from the date of purchase by the original owner,...

That sounds like it's only a one year warranty to me. I don't see anywhere where it says it's a lifetime warranty.

Maybe you have an extended warranty from your dealer? I know a couple of gun stores here do that. Even so, it's not a lifetime warranty from S&W.

 

[Kadonny]

It is very unlikely that changing the gas block will cause any issues. It's almost impossible to do it wrong.

Almost impossible to hurt/damage the gun when swapping the gas block, but for a n00b you can absolutely install it wrong if you don't know to properly line up the gas holes.

 

[Rastoff]

Yeah, you could line up the holes wrong, but even that will be difficult.

The hole in the gas block is intentionally over sized. There is a stop on the barrel preventing the gas block from being pressed on too far. If a pinned gas block is used, it's impossible to get it misaligned. Even if a non pinned block is used, as long as it's pretty close to straight up, it will work fine.

I have tested this theory with my own gun. I installed a gas block that uses set screws. I moved the block about 2° left and right. I then moved it forward, off the stop, a little. I did all this to see how this misalignment would affect the operation of the gun. To my surprise, the gun worked with the gas block in all these positions.

Can it be misaligned? Sure, but it will have to be obviously out of place to cause a malfunction.

 

[wagostini]

Here is my baby to date.
1)Nikon P-223 3-9x40mm
2)Nikon P-Series mounts
3)Quad rail
4)Bipod

 

[MuttX7]

Changing out the A2 sight/gas block will not void the warranty. If you look at the warranty, you will find this statement:This says that defects or malfunctions caused by modifications are not warranted. It is very unlikely that changing the gas block will cause any issues. It's almost impossible to do it wrong.

Secondly, I don't see the "lifetime" part of this warranty. It clearly says: That sounds like it's only a one year warranty to me. I don't see anywhere where it says it's a lifetime warranty.

Maybe you have an extended warranty from your dealer? I know a couple of gun stores here do that. Even so, it's not a lifetime warranty from S&W.

In the owners manual for my Sport as well as in the downloadable .PDF manual on Smith and Wesson's site, it shows the one year warranty and on page 42, the last paragraph states:


Smith & Wesson's Lifetime Service policy begins after the warranty period has expired. Smith and Wesson will repair, without charge, for the lifetime of the original owner, any Smith & Wesson handgun purchased on or after February 1, 1989, and any M&P series rifle that is found to have a defect in material or workmanship. Eligibility for this Lifetime Service Policy requires returning the product registration card within 30 days of purchase. The Lifetime Service Policy covers functional defects, it does not cover the firearm's finish, grips, magazines, or sights. The Lifetime Service policy is in addition to and not an extension of the Smith & Wesson Warranty.

 

[ChattanoogaPhil]

AR15 is a modular rifle.
There's nothing that can't be replaced by a zillion different vendors for cheap.
Not operating the rifle as you wish for fear of voiding the warranty is silly IMO.

 

[cyphertext]

AR15 is a modular rifle.
There's nothing that can't be replaced by a zillion different vendors for cheap.
Not operating the rifle as you wish for fear of voiding the warranty is silly IMO.

I was once one of the "but the warranty" guys, until I started putting together a rifle for my son. Phil is right... you can fix many things yourself. Make sure the rifle functions properly before making any changes and after that, you should be good.

 

[Rastoff]

Interesting. I read the one in this manual: https://www.smith-wesson.com/wcsstore/SmWesson/upload/other/S&W_MP15_Rifle_Manual.pdf

Then I read the one in my M&P pistol manual. That one specifically said the lifetime part is only for pistols. What you posted says both pistols and rifles. Well, good.

It doesn't change the fact that changing the gas block won't void the warranty.

 

[MuttX7]

I was just replying to show that Smith & Wesson has the lifetime warranty, not about what may void the warranty.