Just buy a RIS II if your concerned
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+1 for Midwest. There “Suppressor rails” I forget the model but it’s got a large ID for having a can under the rail And they are very rigid as well plus mlok if that’s your thingI put a midwest 15 inch quad on build and I don't believe it will flex enough to notice. It's heavy though.
I usually wait and proofread my drunk posts before submitting but clearly I didn't this time.November Sierra I tried flexing the barrel and handguard like the article suggested on my rifle and it didn't even come close to touching, however I have a 10" alg handguard and was thinking about going to a 15" because of how much more ergonomic it is when you shoot with the stock fully collapsed like you would pretty much have to in a house. I came across his article while I was googling a particular 15" rail and thought I would ask others who had more experience.
One of the topics not addressed in the article is what material the rail is made of.
6061-T6 is the most common material for rails, but some companies (like Hodge Defense) use 7075-T6. The latter has a much higher tensile strength.
Due to this, the actual thickness of the rail may not be the deciding factor in how stiff it is. A thinner 7075 rail may be stiffer than a thicker 6061 rail.
Many less expensive rails, like Midwest, LOOK stronger and stiffer because they’re thicker. This may not be the case, depending upon what rail you’re comparing them to.