Description
American Precision Arms built the Micro Bastard for slimmer sporter and hunting barrels, then watched it take off in the AR and 3-gun crowd. The reason is simple: it's smaller and lighter than most brakes out there, yet it punches well above its size when it comes to cutting felt recoil. At roughly 1.8 ounces and a slim .750" diameter, it won't turn a graceful pencil-barreled rifle into something front-heavy and awkward looking.
What Makes the Gen 2 Micro Bastard Easy to Live With
The big story with the Gen 2 line is the self-timing design. Instead of casting or 3D printing a part, APA machines these from high-grade stainless steel, and pairs the brake with a separate nut that handles the indexing for you. That means no crush washers, no peel washers, and no trip to the gunsmith if your barrel is already threaded to 1/2"-28. Snug it down with a crescent wrench and you're squared away, usually in under a minute.
Fitment and Caliber Range for the Micro Bastard
This brake is bored to accommodate .308 Winchester and anything smaller, so it plays nicely with 6.5mm, 6mm, and .223/5.56 as well. It's the go-to choice for muzzle diameters in the roughly .600" to .750" range, which covers a lot of light and standard sporter contours along with plenty of AR builds. Overall length runs 1.86", keeping it compact where longer brakes would hang out past the muzzle.
Why Competitive and Hunting Shooters Reach for It
The two-piece setup is a genuine perk for anyone running multiple barrels. You can pull the brake for cleaning or swap it from one rifle to the next in about thirty seconds, which matters when you're burning through barrels over a season. Hunters like that it flattens recoil on hard-kicking magnums without adding much weight up front, and the stainless finish holds up to real field use. It's a small part that quietly does a lot of work.
Key Specifications
- Manufacturer: American Precision Arms
- Model: Gen 2 Micro Bastard
- Manufacturer Part Number: G2M1230S
- UPC: 810131790769
- Finish/Material: Stainless Steel
- Thread Pattern: 1/2"-28 tpi
- Caliber Range: .308 Win and smaller (6.5mm, 6mm, .223/5.56)
- Overall Length: 1.86"
- Diameter: .750"
- Approx. Weight: 1.8 oz
- Recommended Muzzle Diameter: .600" to .750"
- Design: Self-timing two-piece with separate nut
What’s Included
- Gen 2 Micro Bastard muzzle brake
- Self-timing nut
Frequently Asked Questions
Can I install the Gen 2 Micro Bastard myself or do I need a gunsmith?
If your barrel is already threaded to 1/2"-28, you can install it at home in about thirty seconds. The Gen 2 uses a separate self-timing nut, so there are no crush washers or peel washers to fuss with. All you really need is your hands and a crescent wrench to snug it down.
What calibers does the Micro Bastard work with?
It's bored to handle .308 Winchester and anything smaller, including 6.5mm, 6mm, and .223/5.56. That makes it a versatile pick for both AR-platform builds and bolt-action hunting rifles. Just match the thread pitch to your barrel and you're good to go.
Will this brake fit my slim sporter or hunting barrel?
The Micro Bastard was designed with lighter sporter contours in mind and suits muzzle diameters in the roughly .600" to .750" range. Its .750" outer diameter keeps the profile trim so it doesn't look oversized on a pencil barrel. That slim footprint is a big part of why hunters like it.
How is the Micro Bastard different from larger APA brakes like the Little Bastard?
The Micro Bastard is the smaller, lighter option built for slimmer barrels, coming in around 1.8 ounces and 1.86 inches long. The Little Bastard is larger at 1 inch in diameter and suits heavier barrel contours from .750" to 1.0". If you want minimal added weight up front, the Micro is the way to go.




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