System Components Brn-180 Gen 1/2 Adjustable Gas Block, 300 AAC Blackout
$71.99 at Brownells
In stock Sale
Best price
$71.25at MidwayUSA
In stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $71.25checked Oct 1, 2026 | In stock | Buy at MidwayUSA | |
| Brownells | $75.00checked Oct 1, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $75.99Salechecked Oct 1, 2026 | In stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $71.25 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $75.00 | $75.00 | $75.00 |
| MidwayUSA | $71.25 | $71.25 | $71.25 |
| OpticsPlanet | $75.99 | $75.99 | $75.99 |
Since Sep 27, 2026.
About this part
The AR-15 Gas Block Mk12 .750 Steel Black is an AR-15 gas system part from Badger Ordnance. It's sold by 3 stores (3 in stock), from $71.25 to $75.99. The lowest in-stock price in the last 30 days was $71.25 at MidwayUSA.
Fits and works with
- Gas block
- 0.75" diameter · Gas blocks
Specifications
- Manufacturer
- Badger Ordnance
- Color
- Black
- Platform
- AR-15
From the manufacturer
Provides Maximum Clearance For Optics Or Free-Float Handguards
Slim, low-profile replacement for factory front sight gas block provides maximum clearance for optics and free-float handguards. Streamlined profile reduces forward weight and improves your rifle’s appearance. Set screws, gas tube mounting pin, and installation instructions included. Mk 12 is an exact copy of the gas manifold on the Mk12 Mod 1 and Mk 18 Mod 1 Special Purpose Rifles used by the U.S. Army and Navy. Made from 416 stainless steel with a tough, wear-resistant black oxide finish, and fits barrels with .750" O.D. Mk 12 Style in natural stainless, has the same low profile as the Mk12 Mod 1 gas manifold, and fits barrels with .875" O.D.
AR-15, Issue:11, Page:014
Big Book Catalog, Issue:71, Page:014
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