Precision Armament M4 Shoulderless Thread Adapter (1/2x28 to 5/8x24)
Hidden 1/2x28 to 5/8x24 adapter for a permanent install: the muzzle device seats directly on the barrel shoulder.
- Price
- $18
- 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, 0.625 in OD
- •0.2 oz
- •HTSR 400-series stainless
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Precision Armament M4 Shoulderless Thread Adapter, 1/2x28 to 5/8x24
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Overview
The M4 Shoulderless Thread Adapter converts a 1/2x28 barrel to a 5/8x24 external thread and disappears under the muzzle device. With no shoulder of its own, the device seats directly against the barrel shoulder, which keeps full thread-joint strength and gives better alignment to the bore. Internal and external threads are single-point cut in the same operation to UNEF Class 3 tolerances.
It is 0.625 inch long and 0.625 inch in diameter, weighs 0.2 ounce, and is machined from pre-hardened HTSR 400-series stainless. Precision Armament intends it for a more permanent installation; without wrench flats it is not the adapter to swap between rifles, which is what the standard M4 Muzzle Thread Adapter is for.
Key Features
- 1/2x28 in, 5/8x24 out
- Fully concealed under the muzzle device
- Device seats directly on the barrel shoulder
- Threads single-point cut in one operation to UNEF Class 3
- HTSR 400-series stainless
Pros
- +Invisible once the muzzle device is installed
- +Device seats on the barrel shoulder for alignment
- +Least expensive way to put 5/8x24 threads on a 1/2x28 barrel
Cons
- −No wrench flats, so it is awkward to remove and reuse
- −Adds a second thread joint at the muzzle
Detailed Specifications
- inputThread
- 1/2x28
- outputThread
- 5/8x24
- Length
- 0.625 in
- outsideDiameter
- 0.625 in
- weight
- 0.2 oz
- Material
- Pre-hardened HTSR 400-series stainless steel
- manufacturer
- Precision Armament
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