BOSS SilencersGuillotine 556
5.56mm / .223 suppressor · HUB 1.375x24 interface · specs and compatibility from the manufacturer and independent testers
Notable features
- HUB Compatible
- No Barrel Restrictions
- Brake on the Front of the Suppressor
- PEW Science Reviewed
- TBAC Summit Tested
- Full-Auto Rated
length
6″
weight
12oz
MSRP
$575
length
6″
weight
12oz
calibers
5.56
material
Titanium · Steel
interface
HUB 1.375x24
MSRP
$575
Photos
Image: BOSS Silencers
- Overall length
- 6″
- Diameter
- 1.5″
- Weight
- 12 oz
- Material
- 17-4 H900 Stainless Steel / Grade 9 Titanium
- Finish / treatment
- High-Temp Cerakote
- Max caliber
- 5.56mm / .223
- Base interface
- HUB 1.375x24
- Front cap
- BOSS 1.5in Endcap
- Full-auto rated
- Yes
- Barrel restriction
- None (manufacturer stated)
- PEW Science describes the Guillotine as a 223 caliber centerfire rifle silencer intended to suppress the 5.56x45mm cartridge on barrel lengths 10.5-in and longer.
- Brake on the front
- The maker sells a brake end cap that screws onto the front of the suppressor
- Brakes that fit:
- BOSS Silencers Brake End Cap (1.5in)
- BOSS Silencers Recoil X Comp Brake End Cap (1.5in)
- MSRP
- $575
- Class
- 5.56mm / .223
- n
- 333
- Range
- $199–$1,955
- Median
- $900
Cheaper than most 5.56mm / .223 suppressors
MSRP compared against the 333 5.56mm / .223 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Prices are manufacturer's suggested retail (MSRP). What you pay may differ.
Is something on this page wrong?
- Base interface
- HUB 1.375x24
- Front cap
- BOSS 1.5in Endcap
The HUB 1.375x24 is an open standard: 494 mounts and 940 muzzle devices in our catalog fit this suppressor, including BOSS Silencers Direct Thread Adapter, HUB (1/2x28), AAC 51T S.T.A.M.P. Mount and AB Suppressor AB Raptor Adapter. You aren't locked into one manufacturer's parts.
Which ones fit your barrel and host?
Check in the BuilderThe Thunder Beast Silencer Summit fires every suppressor entered on the same gun, with the same equipment. Guillotine 556 was measured in 1 test. Figures can only be compared with others from the same test, so each one links to everything else fired on that gun.
Gas-operated rifles and carbines
Measurements published by Thunder Beast Arms Corp. How to read these
Measured sound results are in the Sound tests section above.
PEW Science · independent test
This suppressor has been independently sound-tested by PEW Science.
Is one of these wrong, or does our wording say something the source doesn't?
Manufacturer claim
- The Guillotine is an ultra high-performance, compact silencer that is among the lightest and most durable 5.56mm silencers on the market. At 1.5" x 6" and right at 12 oz without a mount, you'll hardly notice this can hanging off your barrel.
- The Guillotine features our proprietary, Nikola Tesla-inspired, Coaxially-vented baffles that route the gasses through the silencer for a longer duration than in a standard baffle configuration, dramatically reducing the overall volume of the weapon when compared to other silencers of similar size.
- 17-4 H900 Stainless Steel 3D-printed and nitrided baffle core, Grade 9 Titanium tube, finished in Glacier Black High Temp Cerakote rated to 1800 degrees F.
- Full-auto rated with no barrel-length restrictions, and factory serviceable.
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- The Guillotine includes a direct thread mount in 1/2 - 28, but accepts any standard HUB 1.375-24 pattern mount, including SilencerCo ASR Bravo, or DeadAir Keymo, as examples.
Is one of these wrong, or does our wording say something the source doesn't?