Gap between upper and lower

[northernblue]

Just finished my first build, and am curious if the movement between upper and lower is excessive . Complete upper DD 16 inch light rail ,and lower is a DD that i installed the LPK into.
I measured .011 with a feeler gauge is that considered excessive?
Thank you for your time

[Thomas M-4]

.011'' sounds about right. Credit card is about .030'' which is how most will judge excessive.

[northernblue]

Is the .030 for static measurement? Meaning my concern is i can twist the upper and lower and the rifle will rattle, I took my measurement when twisting it in one direction. I have 0 experience with the AR platform and do apologize in advance.

[warlord260]

I can testify to the rattling, as i was on the phone with him, and i heard it rattle. Tried to call brother, mine has no movement, no rattle. The gap is very small. Might be .003.

[Thomas M-4]

A rattling sound is fine it happens.

[Leonidas24]

Play between the receivers can be different between brands, but yours sounds about right. A milspec M4 has about that much play between upper/lower. My VLTOR MUR and Tactical Machining lower on the other hand is tight as a drum.

[northernblue]

Thanks for the information guys.