Barrel Length Restrictions for Suppressors

Nobody knows your suppressor better than the manufacturer who designed it. If this article has done its job, you now have a clearer sense of what you still need to ask, and the right questions to bring to that conversation about whether your suppressor is safe on your specific host. Check with your manufacturer to confirm barrel length restrictions and caliber compatibility of your can.

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You might have noticed that barrels, as they approach the muzzle, might reduce in diameter. This is a simple function of the internal pressures decreasing as more powder is burned off and pressure is turned bullet velocity and heat. Because of this, a suppressor that worked just fine on a long barrel could fail catastrophically on a shorter one. Check out this video by 3RBallistics where he subjects a form 1 Nylon can to an overpressure scenario resulting in a catastrophic failure. Does a can always fail because of an overpressure scenario? Not always. It failure is a function of multiple, potentially compounding forces. Can can that might have be rated for a certain length, if subject to enough heat, could reduce the pressure needed to damage a can.