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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 rulesSilencerCo
Overview
The SilencerCo LBP 556K Suppressor is designed for use with 5.56 NATO caliber firearms, providing effective sound suppression and recoil mitigation. Featuring an ASR mount type, it allows for quick attachment and detachment to compatible muzzle devices, making it convenient for builders who frequently switch between configurations. This suppressor is commonly found in mid-length gas system builds, where optimizing performance and reducing noise is essential for the shooter.
Specifications
SilencerCo LBP 556KSuppressor W/ Charlie ASR Mount - SU5420
Available Merchants(1)
Prices checked
Price Alert
Build history on GunPartPicker
Builders have added the SilencerCo LBP 556KSuppressor W/ Charlie ASR Mount - SU5420 to their builds on GunPartPicker. Since April 2026, it ranks #155 of the 536 suppressors builders have added.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $989.40, with no real sale all month. Buying today, the lowest price is $989.40 at Classic Firearms, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with 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.
Builds Featuring This Part
See all builds →Builds in the community that include the SilencerCo LBP 556KSuppressor W/ Charlie ASR Mount - SU5420
| Build | Parts | Total |
|---|---|---|
 | 13 | $2178.70 |
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