I have an AR10 build that I'm finishing up, and I was thinking about skipping the typical alloy free-float handguard and instead installing a delta ring, retainer cap and a Magpul MOE handguard.

This isn't a precision rifle, and I don't really think the free-floated barrel is a huge advantage for me I also like the idea of a simple plastic handguard that I won't mind scratching up. The heat shields will be nice, to

The one thing I'm not sure about is whether the superlative arms adjustable gas block I have is designed to install with a small gap between itself and the shoulder of the barrel.

Anyone done an install like this? Basically a GI type handguard but with no FSB?

Is there anything I'm not thinking of?

My understanding is that the barrel-facing orifice on most gas blocks, SA included, is large enough that the gap made by the presence of an end cap is a non-issue. Grab a micrometer and take some measurements. Thickness of end cap (A), distance from rear of gas block to orifice (B), Distance from shoulder of gas block journal to edge of gas port (C).

If A+B is less than C, then the gas port in the barrel should line up fine with the gas block orifice.

If A+B is greater than C, then you will have some overlap.

I think I did that right...