HUB – Extended Plan-B (HPA) Steel Suppressor Adapter

The Comstock Armory Extended Plan-B HPA Steel Suppressor Adapter is available now from LM Ironwerks, a licensed FFL/SOT dealer in Louisville, Kentucky.

Extended/XL suppressor adapter compatible with Comstock, Rearden, and other common Plan-B muzzle devices. Currently the lightest extended steel Plan-B HUB adapter on the market at just 1.9 ounces. Compared to the standard LPA, the HPA gives an additional 0.4″ of space in the blast chamber to fit longer muzzle devices. The rear cylindrical section is 1.08″ wide and will tuck under nearly all handguards.

• Allows for the quick attachment and removal of suppressors
• High strength 17-4 PH stainless steel
• Durable black nitride finish
• Standard 1.375-24 threads (also known as HUB or Bravo) for use on most rifle suppressors
• Has both 1-7/16″ wrench flats and 1.5″ spanner notches for easy installation and removal
• 0.7″ added length
• 1.9 ounces

Buying the Comstock Armory Extended Plan-B HPA Steel Suppressor Adapter from LM Ironwerks

It ships directly to the address you enter at checkout, so no dealer transfer is needed. In addition, our team reviews every order before it ships. Have a question about fit or compatibility? Contact us before you order and we’ll help. Looking for something different? Browse all of our suppressor parts.