I just got my upper in with the new Samson Evo rail. I purchased it as a complete upper built off a Rainier Arms Ultramatch with a Shilen 16in barrel. No range time on it yet. But here is what I have noticed about it.
1.) Don't get confused guys about flex. Seems some of you are flexing the barrel and not the hand guard but confusing the two. The barrel will flex with pressure applied a good half inch either direction. It's just the nature of barrels. When using a hasty sling setup, I can watch the barrel flex on some non free float uppers. This is why people use free float. Now the only way to really tell if the rail is flexing is to use a vice on the upper receiver and manipulate the rail or use a sling to pull HARD and have a buddy look to see if it is moving relative to the untouched barrel.
2nd at one time I purchased an upper that had a Vikings Tactile VTAC Rail. I sent that back first day because of one reason. If I was to have the spare rails piece mounted under the gas block area it would touch the back of the rail mounting piece. This is not good for accuracy. The only way to fix this would be to grind down that backing plate. Its a BAD design flaw. This was a low profile gas block too. Now with the Samson, the rail is a slightly larger diameter so this is not an issue. There is a good 3 mm between those plates and the gasblock. I don't know what Vikings or Troy for that matter were thinking with the design its an obvious issue. Maybe my gasblock is wrong. But I doubt it. I have read others had the same issue too. So the Samson solved that for me.
Other than that, I like it a lot. Time and rounds will tell the rest of the story.


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