NFA item — $0 federal tax stamp. Order, we file the ATF Form 4 on eForms, you pick up at your SOT dealer after approval. Flat $14.99 firearm shipping.
Licensed FFL · Class 2 SOTWe file the Form 4$0 tax stamp
How the Form 4 process works
Transfers on an ATF Form 4 with a $0 federal tax stamp (as of Jan 1, 2026). We file the paperwork on eForms and keep you posted on status; you pick up at your SOT dealer with photo ID after ATF approval. How the Form 4 works →NFA & suppressor guide →
Obsidian45 Specifications Diameter: 1.37 Length: Standard Configuration: 8.6 Short Configuration: 6.7 Weight: Standard Configuration: 12.8oz; Short Configuration: 10.7oz Belt Fed Rated for Pistol Calibers up-to 45ACP 300BLK Subsonic (with an 8 barrel) 350 Legend (with a 16 barrel or longer) 450 Bushmaster (with a 16 barrel or longer) Materials Baffles: 17-4 Stainless Steel Tube: Hard Coat Anodized Aluminum Mount: 17-4 Stainless Steel Finish: High Temp Cerakote (FDE) Additional Features Removable Front Caps 9mm Front Caps available Pistons work as a Front Cap Tool Includes .578 28 piston 45ACP Front Cap Obsidian45 Suppressor ADAPT Module Operator s Manual Obsidian Logo Sticker
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
