# US 8,739,674 B1 · Muzzle brake cover with blast diverter

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- Number: US 8,739,674 B1
- Document ID: US8739674B1
- Status: Granted
- Kind: B1
- Application number: 13/680,577
- Filed: 2012-11-19
- Granted: 2014-06-03
- Earliest claimed: 2011-11-23
- Applicants: David C. Huber; Christopher P. Lucci
- Inventors: David C. Huber; Christopher P. Lucci
- Web page: https://patentgrep.com/patent/US8739674B1

## CPC

- F41A 21/32: Muzzle attachments or glands (F41A21/26, F41A21/30, F41A21/46 take precedence {; for projectile velocity measurements G01P3/665, G01P3/685})
- F41A 21/36: for recoil reduction (recoil reduction arrangements in general F41A25/00){; Stabilisators; Compensators, e.g. for muzzle climb prevention}
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

A muzzle brake cover for providing blast diversion for firearms which include an extension for attachment on an end of a muzzle brake or flash suppressor. The extension can have a cylindrical inner surface of an inner diameter larger than that of the extension outer diameter of the muzzle brake or flash suppressor, concentric rings extending around the cylindrical inner surface, a threaded portion, a smooth portion disposed between the concentric rings and the threaded portion for fitting over portions of the muzzle brake, and a collar comprising a plurality of tightening surfaces for allowing quick tightening of the muzzle brake cover.

## Claims

### Claim 1

A muzzle brake cover providing blast diversion for firearms comprising:
an extension having a front end, a back end, and having a cylindrical inner surface with an inner diameter adapted to attach to and cover at least a portion of an outer cylindrical surface of a muzzle brake or flash suppressor of a firearm, wherein the inner diameter is larger than an outer diameter of the muzzle brake or flash suppressor;
b. one or more concentric grooves extending around the cylindrical inner surface of the extension to assist in flash suppression;
c. a threaded portion extending around the cylindrical inner surface of the extension for engaging the muzzle brake or flash suppressor;
d. a smooth inner surface portion disposed between the one or more concentric grooves and the threaded portion for fitting over portions of the muzzle brake or flash suppressor; and
e. a collar on the outer surface of the extension to assist with tightening of the muzzle brake cover over the muzzle brake or the flash suppressor of the firearm.

### Claim 2 (depends on 1)

The muzzle brake cover of claim 1, wherein the threaded portion has one or more threads.

### Claim 3 (depends on 1)

The muzzle brake cover of claim 1, wherein the one or more concentric grooves are formed equidistantly apart with a cut depth that does not penetrate the wall of the muzzle brake cover.

### Claim 4 (depends on 1)

The muzzle brake cover of claim 1, wherein the one or more concentric grooves are formed 3.2 millimeters apart with a cut depth of 1.5 millimeters and extending from 20 percent to 80 percent from one end of the muzzle brake cover to the smooth portion.

### Claim 5 (depends on 1)

The muzzle brake cover of claim 1, wherein the one or more concentric grooves have a square cut.

### Claim 6 (depends on 1)

The muzzle brake cover of claim 1, wherein one or more concentric grooves have a ring bevel of 30 degrees inclined towards a bore in line with the front end.

### Claim 7 (depends on 1)

The muzzle brake cover of claim 1, wherein the smooth portion provides a clearance between the inner surface and the muzzle brake or flash suppressor outer surface of 0.5 millimeters to 3 millimeters.

### Claim 8 (depends on 1)

The muzzle brake cover of claim 1, further comprising one or more tightening surfaces on the collar.