Description
Important: This blast shield does NOT thread directly onto your barrel. It is designed for use only with compatible 13/16×16 outside-threaded OTX muzzle devices here: https://midstatefirearms.com/product-category/ar15-ar10/outside-threaded...
OTX Castle Blast Shield by Mid State Firearms – Compatible with Legacy Breek Arms Castle System
The OTX Castle Blast Shield by Mid State Firearms is the direct replacement for the legacy Breek Arms Castle Blast Shield. Built to the same proven design and fully compatible with existing Castle muzzle devices, the OTX line ensures current owners can continue using their existing setups while new customers benefit from continued production and support from Mid State Firearms.
Direct Replacement for the Breek Arms Castle Blast Shield
If you’re looking for a replacement or additional blast shield for your Breek Arms Castle muzzle brake or flash hider, the OTX Castle Blast Shield is the correct solution. It uses the same mounting interface, threads directly onto legacy Castle-compatible muzzle devices, and offers the same compact size, lightweight construction, and forward blast redirection.
Whether you’re replacing a worn unit or expanding your rifle setup, the OTX Castle Blast Shield maintains full compatibility with the legacy Castle ecosystem.
Reduce Side Blast and Concussion
Aggressive muzzle brakes provide excellent recoil reduction but can produce significant side blast and concussion. The OTX Castle Blast Shield helps redirect muzzle blast, noise, and gases forward and downrange, making shooting more comfortable for the shooter and those nearby.
This is especially beneficial on:
Short-barreled rifles (SBRs)
AR-15 pistols
Indoor ranges
Team shooting environments
Training classes
The blast shield threads on or off in seconds without tools, allowing you to switch between maximum muzzle brake performance and reduced side concussion depending on your shooting conditions.
Slim, Lightweight Design
Designed to fit modern sporting rifles without unnecessary bulk, the OTX Castle Blast Shield features:
Slim 1.26-inch outside diameter fits inside most free-float and slim-line handguards
Compact 2.15-inch overall length
Lightweight 6061 aluminum construction
Durable black anodized finish
Only 1.6 ounces
Compatibility
The OTX Castle Blast Shield is compatible with:
OTX Outside Threaded Muzzle Devices by Mid State Firearms
Legacy Breek Arms Castle muzzle devices / Outisde threaded line
Any compatible 13/16×16 TPI outside-threaded OTX/Castle system
It does not mount directly to barrel threads. It mounts to our compatible 13/16 muzzle devices.
Specifications
Manufacturer: Mid State Firearms
Product Line: OTX
Material: 6061 Aluminum
Finish: Hard Anodized
Weight: 1.6 oz
Length: 2.15″
Outside Diameter: 1.26″
Mounting Thread: 13/16×16 TPI
Fits Most Slim-Line Handguards
Important Information
The OTX Castle Blast Shield redirects blast forward but is not a suppressor and does not significantly reduce firearm noise. Always wear appropriate hearing protection while shooting.
