Comstock Armory RPA Recessed Plan-B Suppressor Adapter - Bravo/HUB Compatible

Comstock Armory RPA Recessed Plan-B Suppressor Adapter - Bravo/HUB Compatible

The Comstock Armory RPA (Recessed Profile Adapter) is a lightweight, high‑strength Plan‑B–style suppressor adapter engineered for shooters who want the shortest, cleanest, and most secure mounting interface possible. Designed to work with Rearden and other common Plan‑B muzzle devices, the RPA reduces overall suppressor length and tightens the handguard‑to‑suppressor gap—making it ideal for compact builds and modern rifle setups.

Available in 17‑4 PH stainless steel (2.1 oz) or Grade 5 titanium (1.2 oz), the RPA is currently the lightest recessed Plan‑B HUB adapter on the market in both materials. Each model features standard 1.375‑24 HUB/Bravo threads, a 0.18" added length, and dual wrench interfaces (1‑7/16" flats + 1.5" spanner notches) for easy installation and removal.

The recessed design places the muzzle device 0.40" deeper than the standard LPA, offering a more compact suppressor footprint. As with all aftermarket mounts, users should verify suppressor compatibility, check bullet stabilization, and confirm alignment before firing.

Built for durability, precision, and minimal added weight, the RPA is the ideal upgrade for shooters seeking a refined, low‑profile Plan‑B mounting solution.

Recessed Profile Design
Shortens overall suppressor length and tightens handguard clearance.

Plan‑B Compatible
Works with Rearden and other common Plan‑B muzzle devices.

HUB/Bravo Threading
Standard 1.375‑24 threads for use with most rifle suppressors.

Quick‑Attach Capability
Enables fast, secure suppressor mounting and removal.

Dual Wrench Interfaces
1‑7/16" flats + 1.5" spanner notches for easy installation.

Minimal Added Length
Only 0.18" added to the suppressor system.

Recessed Fitment
Places muzzle devices 0.40" deeper than the standard LPA.

Precision‑Machined
Ensures proper alignment and reliable performance.

Steel RPA (17‑4 PH Stainless Steel)

• Material: 17‑4 PH stainless steel
• Finish: Black nitride
• Weight: 2.1 oz
• Durability: Maximum strength and heat resistance

Titanium RPA (Grade 5 Titanium)

• Material: Grade 5 titanium
• Finish: PVD
• Weight: 1.2 oz
• Durability: Ultra‑lightweight with excellent corrosion resistance