Magpul BUIS Gen 2

[lockednloaded]

I know these sights are not supposed to be used with gas blocks but does this include low profile gas blocks? I have a noveske infidel upper and would like to run these sights. Any help is appreciated.

[strongpoint]

I know these sights are not supposed to be used with gas blocks but does this include low profile gas blocks?

yes, it does. gas blocks transfer too much heat for plastic BUIS.

[Jet Setter]

Regardless of size, they cannot be on a gas block due to heat. Mount them on the flat top (if you have one) just behind the gas block and it should be OK. That is where mine is and it OK so far.

[krnrspd]

he's talking about a dissipator type setup where the low profile gas block is covered by free float forearm

yes the plastic MBUS should be fine, your rail extends to the end of the barrel just before the threads right?

if so mount the mbus at the last possible rail slot which will increase the sight radius which will make it more accurate and effective as a sight and it will keep it away from the heat of the gas block