This Radical Firearms 10.5 inch 556 RPR Pistol has been one of my best firearms purchases to date. This is a great pistol/upper to get if you are looking to get into the AR-15 pistol game without spending a lot of money upfront. You don't get a lot in terms of flashy features or premium features but what you do get is a very well-put-together pistol right out of the box that will do everything you need it to. This pistol is very reliable. Even through the break in process I had no failures to feed or jams which was very impressive, to say the least. The pistol has a very sturdy rail that has plenty of space to hold all the accessories that you would ever need. This pistol is a must if you are looking to get into AR-15 pistols.