I just purchased a S&W M&P-15 (sport) and need to sight it in. It comes with an A2 front sight. I have a front sight tool b/c I've found using a nail or bullet tip to be a PITA. If I want to swap out the front sight post that is more visible, is it just a matter of unscrewing the current one and dropping in the new one? Any recommendations for a replacement post?

An A1 front sight is bigger and has a rounded profile. It is easier for target acquisition but has less precision than the A2 sight. Also, you will need an A1 sight tool. A2 has a different number of notches.

I just purchased a S&W M&P-15 (sport) and need to sight it in. It comes with an A2 front sight. I have a front sight tool b/c I've found using a nail or bullet tip to be a PITA. If I want to swap out the front sight post that is more visible, is it just a matter of unscrewing the current one and dropping in the new one? Any recommendations for a replacement post?

 

It is that easy to replace the front post; unscrew old one...keep an eye on the detent and spring and screw in the new. I went with the Hiviz fiber optic front and I love it! Tough to see in the pic, but you get the idea.

 

It is that easy to replace the front post; unscrew old one...keep an eye on the detent and spring and screw in the new. I went with the Hiviz fiber optic front and I love it! Tough to see in the pic, but you get the idea.

 

 

How thick is that sight? I'd really like to get one like that for low light.

How thick is that sight? I'd really like to get one like that for low light.

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Trijicon makes a tritium night sight for the AR platform. You can get either a front and rear sight packaged together or just a front sight post

 

http://www.trijicon....t3.php?pid=CP25

 

http://www.trijicon....3.php?pid=CP25F

 

Be mindful that taking the A2 rear sight apart and reassembling it again (if that is what you have) is a PITA so be prepared to chase the ball detents around the kitchen. LOL