Precision Armament M4 Muzzle Thread Adapter (1/2x28 to 5/8x24)
Converts a 1/2x28 AR-15 muzzle to 5/8x24 so .30-caliber brakes and suppressor mounts thread on.
- Price
- $23
- Weight
- 0.2 oz
- Brand
- Precision Armament
- Category
- Muzzle Thread Adapters
Features
- •1/2x28 barrel thread in
- •5/8x24 external thread out
- •0.625 in long, 0.825 in OD, 0.750 in flats
- •0.24 oz
- •HTSR 400-series stainless
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Overview
The M4 Muzzle Thread Adapter converts a 1/2x28 AR-15 or M16 barrel to a 5/8x24 external thread, so any 5/8x24 muzzle device, including Precision Armament's M11 and M41 brakes, or a 5/8x24 suppressor mount can be installed. Internal and external threads are single-point cut in the same operation to UNEF Class 3 tolerances for concentricity, which is what matters when a suppressor rides on the adapter.
It is 0.625 inch long with a 0.825-inch OD and 0.750-inch wrench flats on the shoulder, weighs 0.24 ounce, and moves the muzzle device only 0.100 inch forward. It is machined from pre-hardened HTSR 400-series stainless, in PVD matte black or matte stainless. The shoulder stays visible after installation; for a fully concealed adapter, Precision Armament sells the M4 Shoulderless Thread Adapter.
Key Features
- 1/2x28 in, 5/8x24 out
- Threads single-point cut in one operation to UNEF Class 3
- Moves the muzzle device only 0.100 in forward
- Wrench flats on the shoulder for repeat installs
- HTSR 400-series stainless, PVD black or matte stainless
Pros
- +Opens 5/8x24 brakes and suppressor mounts to a 1/2x28 barrel
- +Wrench flats make it easy to move between rifles
- +Adds only 0.100 in of length
Cons
- −Shoulder stays visible after install
- −Adds a second thread joint at the muzzle
Detailed Specifications
- inputThread
- 1/2x28
- outputThread
- 5/8x24
- Length
- 0.625 in
- outsideDiameter
- 0.825 in
- flats
- 0.750 in
- weight
- 0.24 oz
- Material
- Pre-hardened HTSR 400-series stainless steel
- Finish
- PVD matte black or matte stainless
- manufacturer
- Precision Armament
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Build Your Custom Configuration
Add the Precision Armament M4 Muzzle Thread Adapter (1/2x28 to 5/8x24) to your build and see how it enhances your platform.