The MagnetoSpeed Large Brake Adapter (brand part no. MS_LBA) lets a MagnetoSpeed V3 Chronograph clamp onto rifles carrying muzzle brakes up to 7.7 inches long and barrel diameters up to 1.6 inches at the muzzle. MagnetoSpeed designed it specifically to compensate for the oversized muzzle brakes common on large-caliber rifles such as .338 and .50 BMG, where a standard mount can’t clear the hardware. Machined from milled 6061 aluminum, the adapter uses the included V3 Rail Adapter to clamp directly onto the rifle’s barrel rather than the muzzle device itself, giving the V3 Chronograph’s bayonet a stable mounting point. The MagnetoSpeed V3 Chronograph itself is sold separately and is not included. For big-bore shooters who need chronograph data past an oversized brake, this rifle accessory makes the fit possible.

Key Specifications

• Compatible with muzzle brakes up to 7.7 inches long.
• Fits barrel diameters up to 1.6 inches at the muzzle.
• Designed for large-caliber rifles such as .338 and .50 BMG.
• Machined from milled 6061 aluminum.
• Includes the V3 Rail Adapter for mounting.
• Clamps directly onto the rifle’s barrel, not the muzzle device itself.
• Built to work with the MagnetoSpeed V3 Chronograph’s bayonet.
• The V3 Chronograph itself is not included.
• Shipping weight runs about 0.95 pound.

Frequently Asked Questions

Does this include the chronograph? No, the MagnetoSpeed V3 Chronograph is sold separately and is not included.

Why would I need this over the standard mount? Large-caliber rifles like .338 and .50 BMG often carry muzzle brakes too long or barrels too thick for a standard MagnetoSpeed mount to clear.

Does this adapter clamp onto the brake? No, it clamps onto the barrel itself using the included V3 Rail Adapter.

Buy the MagnetoSpeed Large Brake Adapter

Oversized brakes on big-bore rifles no longer have to mean giving up chronograph data at the muzzle. Order it from our Lubbock, Texas gun shop for fast, insured shipping.