Gas block

[GUTS]

I was wondering why someone would tell you to watch the gas block, I have never had the pins on one loosen up.

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[A. F Medic]

If I remember, the hole for gas passage can become smaller due to build up. I know what a gas block is now ! THanks to all.

[Stevo]

I was wondering why someone would tell you to watch the gas block, I have never had the pins on one loosen up.

I imagine they were referring to clamp-on or set-screw gas blocks.

If I remember, the hole for gas passage can become smaller due to build up. I know what a gas block is now ! THanks to all.

That's not something you need to worry about unless you're shooting .22LR in your upper. Otherwise the gas system should be zero maintenance until you burn your gas tube out. I imagine that would take 20K+ rounds.