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Questions & Answers
Will this brake work with a Wilson Combat 6.5 Grendel barrel? Manufacturer Answer

Yes. As long as you are using 5/8x24 threaded barrels.

by Jacob Grey, Manufacturer, October 24, 2023
Hi will this fit a 9mm Expert Answer

No, the Jacob Grey Firearms Cobra Billet Muzzle Brake is bored for .30 cal. 9mm has a larger bullet diameter and would not be compatible.

by Ethan, Gear Expert, January 6, 2023
Customer Reviews
Helpful Positive Review
Noticeable Recoil Reduction by Scrap, Verified Owner, August 9, 2023
TLDR: It does what it is supposed to do, it does it well and it does it for the right price. I picked this up looking for something for a .30 caliber style pistol. Unfortunately, OP shipped me the straight one rather than the angled one, but the por...
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2/2 found this helpful
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Product Info for Jacob Grey Firearms Cobra Billet Muzzle Brake

Fluted and milled slots reduces the weight and provides an aggressive aesthetic appearanceimage

Crush washer recommended for installation

No porting at the bottom to reduce dust signature when firing from the prone position

No porting at the top to reduce flash sight obstruction through optics or sights

Specifications for Jacob Grey Firearms Cobra Billet Muzzle Brake:

Manufacturer: Jacob Grey Firearms
Caliber: .30 Carbine
Finish: Class III Hard Anodized
Fabric/Material: Steel
Threads per Inch: 5/8x24
Gun Make: AR Platform
Gun Model: AR-9
Inner Diameter: 0.34 in
Length: 3.2 in
Weight: 4.5 oz

Package Contents:

  • Jacob Grey Firearms Cobra Billet Muzzle Brake

Jacob Grey Firearms Cobra Billet Muzzle Brake Orderable Models

List of Orderable Models

  • Jacob Grey Firearms Cobra Billet Muzzle Brake, .30 Cal, 5/8x24 Thread, Flat, Stainless, Unfinished, CMBFSTN , MPN: CMBFSTN , UPC: 850040696608 , Code: 4M6-BMB-COBRVR-CMBFSTN
  • Jacob Grey Firearms Cobra Billet Muzzle Brake, .30 Cal, 5/8x24 Thread, Flat, Black, CMBFBLK , MPN: CMBFBLK , UPC: 850040696592 , Code: 4M6-BMB-COBRVR-CMBFBLK
  • Jacob Grey Firearms Cobra Billet Muzzle Brake, .30 Cal, 5/8x24 Thread, Angled, Stainless, Unfinished, CMBASTN , MPN: CMBASTN , UPC: 850040696622 , Code: 4M6-BMB-COBRVR-CMBASTN
  • Jacob Grey Firearms Cobra Billet Muzzle Brake, .30 Cal, 5/8x24 Thread, Angled, Black, CMBABLK , MPN: CMBABLK , UPC: 850040696615 , Code: 4M6-BMB-COBRVR-CMBABLK
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