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Phase 5 Weapon Systems
Overview
The Phase 5 FATman 1/2-28 Hex Brake is a muzzle brake designed specifically for 5.56 NATO caliber firearms. It effectively reduces recoil and muzzle rise, allowing for quicker follow-up shots and improved control during rapid fire. This muzzle device is commonly found on carbine-length gas system builds, making it a popular choice for those looking to enhance the performance of their AR-15.
Prices checked
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 5 of the 6 retailers we track have it in stock. Prices barely moved in October 2026, holding around $120, with no real sale all month. Buying today, the lowest price is $120 at Optics Planet, which matches the best price we saw in October.
Prices checked · refreshed daily across 37 retailers
We ranked every muzzle device by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Muzzle Device Guide →Check it against the live catalog:
The part most often added in each category by the builds that include this one

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Builds in the community that include the Phase 5 FATman 1/2-28 Hex Brake, 5.56mm/.223 Rem - FATman-556
| Build | Parts | Total |
|---|---|---|
![]() | 26 | $1898.05 |
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