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Precision ArmamentMuzzle Thread AdaptersValue Tier

Precision Armament M4 Muzzle Thread Adapter (9/16x24 to 5/8x24)

Converts a 9/16x24 muzzle, common on 6.5 Grendel barrels, to 5/8x24 for brakes and suppressor mounts.

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Price
$28
Weight
0.2 oz
Brand
Precision Armament
Category
Muzzle Thread Adapters

Features

  • •9/16x24 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

Capability Boosts

Modularity+1

Recommended For

Duty/Patrol
duty
Competition
customization

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Overview

This version of the M4 Muzzle Thread Adapter converts a 9/16x24 barrel thread, which Precision Armament notes is used on most 6.5 Grendel barrels, to a 5/8x24 external thread. That opens the much larger selection of 5/8x24 brakes and suppressor mounts to a Grendel. Internal and external threads are single-point cut in the same operation to UNEF Class 3 tolerances for concentricity.

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.

Key Features

  • 9/16x24 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
  • HTSR 400-series stainless, PVD black or matte stainless

Pros

  • +Gives a 9/16x24 Grendel barrel access to 5/8x24 devices and mounts
  • +Adds only 0.100 in of length

Cons

  • −Shoulder stays visible after install
  • −Adds a second thread joint at the muzzle

Detailed Specifications

inputThread
9/16x24
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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Compatibility Tags

family: ar-patternfamily: modern-riflethread: 9/16x24thread-output: 5/8x24platform: builder-hidden

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