Comstock Armory Extended Titanium HPA - Plan-B Compatible Adapter

Comstock Armory Extended Titanium HPA - Plan-B Compatible Adapter

Designed for maximum strength with minimal weight, this Extended (XL) Titanium Plan-B HUB suppressor adapter is compatible with Comstock, Rearden, and other common Plan-B pattern muzzle devices. Weighing just 1.1 ounces, it is currently one of the lightest extended titanium Plan-B HUB adapters available.

Compared to standard low-profile adapters, this model provides an additional 0.4" of blast chamber space, allowing clearance for longer muzzle devices while maintaining a compact footprint. The 1.08" rear cylindrical section is engineered to tuck under most handguards for a streamlined, integrated setup.

Machined from Grade 5 Titanium and finished in a durable PVD coating, this adapter delivers exceptional strength-to-weight performance along with superior corrosion and wear resistance.

Extended / XL Design
Adds 0.4" of additional blast chamber space.

Plan-B Pattern Compatible
Works with Comstock, Rearden, and similar Plan-B muzzle devices.

HUB / Bravo Threads (1.375-24)
Fits most modern rifle suppressors.

Grade 5 Titanium Construction
Outstanding strength-to-weight ratio.

Durable PVD Finish
Enhanced surface hardness and corrosion resistance.

Low-Profile Rear Section (1.08")
Compatible with nearly all handguards.

Tooling Interfaces
1-7/16" wrench flats and 1.5" spanner notches for easy install/removal.

Ultra-Lightweight
Only 1.1 ounces.

Specifications

• Thread Pattern (Suppressor Side): 1.375-24 (HUB / Bravo)
• Material: Grade 5 Titanium
• Finish: PVD
• Weight: 1.1 oz
• Added Length: 0.7"
• Rear Diameter: 1.08"
• Compatibility: Plan-B pattern muzzle devices