M&P15 Sport
I have had mine for like almost 4 months and I shot it about every Thursday since the weather broke, I have got like 600+rounds through it. The more I shoot it the better it gets, I mainly shoot .223/PMC brass. I have shot some 5.56 Federal, Winchester and Independence. I have found that it likes the .223 better but I have only shot like maybe 160rds of 5.56 through it. The .223/PMC rounds are cheaper than that of the 5.56.
So far I like the rifle, I have had some issues with it but they where easily fixed and simple. Mainly just breaking in period issues. A few FTF, FTE, double feeds, but lately it has been running like a champ. I keep it well lubed and it runs like a champ. I was killing Red soda pop cans today at 50-60yrds with my sight mark reflex and just the irons. I changed out the hand guard with a Magpul, Magpul pistol grip and the B.A.D lever. I paid like $740.00 with tax for mine here in Indiana, I wish I could have got one for the prices I have seen on here.
It has the 1/9th twist barrel, mine is clearly marked 5.56 Nato so it can shoot both 5.56/.223 rounds. Again so far has been a great rifle and love to shoot it. My only problem with the rifle is that I am a larger man and even with the butt stock extended all the way out it still is short for me, besides that GREAT RIFLE and fun to shoot. Highly recommend one for your firs AR15 platform rifle, it was my choice for my first of this style of rifle.