VPA Compensator FAQ

• Why is there carbon between the barrel and compensator?
  The PX4 uses a rotating barrel, so compensators mount to the rail, not the barrel. That leaves a small gap between the barrel crown and the compensator where gases and carbon can flow.
• Will a cut and crowned barrel make this worse?
  Cutting and crowning increases the gap slightly, which can allow more gas to escape into the space and cause a slight drop in compensator efficiency. It does not change the underlying phenomenon.
• Does any company make a compensator that avoids this?
  Vantage Point Armory has strengthened the compensator mount to reduce movement, but carbon build up in the gap is inherent to rail-mounted compensators on the PX4.
• What should I do about it?
  Expect to clean more often when running a compensator on a PX4. Simple, effective steps include using a suppressor/ carbon cleaner such as Breakthrough Suppressor Cleaner to remove trapped carbon, then a solvent and light lubrication. Inspect and clean the gap after shooting sessions or on a schedule that matches how often you shoot.

• Why would someone still cut and crown a barrel?
  Many choose to cut and crown a barrel with NP3 for increased lubricity and corrosion resistance. That benefit is weighed against the trade-off of increased carbon accumulation and slightly reduced compensator efficiency.