i originally wanted to get lmt's buffer extension but they were out of stock. so i went with this since i was getting armalite for all of my other lower parts stuff. i was pleased with this buffer tube. it serves the purpose. the stock (magpul) fit nice and snug. i felt the threads could have been machined a little better BUT it did go on nicely, no snags and fit snug. for the money i dont think you can beat it.