Plan your Class 3 dealer
Suppressors go through a Class 3 (SOT) dealer, and the federal tax on them has been $0 since January 1, 2026. You still pay the dealer's transfer fee. Some states only allow suppressors and SBRs that are federally registered or possessed in compliance with federal law. Check your state's statute before you buy.
Federal and state suppressor rulesOtter Creek Labs
Overview
The OTTER CREEK SUPPRESSOR INFINITY 556K is a suppressor. Compare prices from multiple merchants and find the best deal.
Specifications
Available Merchants(1)
Prices checked
Stock Alert
September 2026 on GunPartPicker
OTTER CREEK SUPPRESSOR INFINITY 556K ranked #28 of the 163 suppressors builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since June 2026. All time, it ranks #50 of the 463 suppressors builders have added. Builds with this suppressor are mostly chambered in 5.56 NATO (67%, then 6mm ARC 22%), split between carbine-length (50%) and mid-length (38%) gas systems, and nearly all AR-15.
Today the one retailer we track is out of stock. Listed prices start at $775 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Griffin Armament MK1 AR-15 Stripped Lower Receiver
Wolf AR-15 A1 Complete Upper Receiver 5.56 Piston - A1 T91 Complete Upper Receiver 5.56 Piston
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
B5 Systems SOPMOD Government, Mil Spec, Coyote - SOP1352
Radian Raptor Slim Line Ambidextrous AR-15 Charging Handle - Black
Cryptic Coatings 5.56 NATO AR-15 Bolt Carrier Group - Mystic Bronze
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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