Loupis

So i recently removed my front sight to try out my prototype experimental front sight i wanted to reattach the original i thought i read some where the nut that holds it is one time use. If that is true where can i find a replacement?

So i really cant decide if i want a titanium or steel mag tube. i must admit the steel on from FFT for 150$ is looking really good compared to carrier comp 5 week waiting period. Would the weight really be a big difference?

Im looking to buy a m4 standard stock please pm if you have one for sale. thanks