• SOLGW M4-L89 Complete Upper Receiver 14.5" 5.56 NATO Pinned Welded ASR
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Sons Of Liberty Gun Works

SOLGW M4-L89 Complete Upper Receiver 14.5" 5.56 NATO Pinned Welded ASR

SOLGW M4-L89 Complete Upper Receiver 14.5" 5.56 NATO Pinned Welded ASR

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The Sons of Liberty Gun Works M4-L89 Complete Upper Receiver Group pairs a 14.5" Liberty Fighting Barrel in 5.56 NATO with a pinned and welded ASR Flash Hider, bringing the total length to 16". Its 13.75" L89 handguard carries seven-sided M-LOK slots for mounting accessories, while the forged upper receiver has a matte finish.

The Drivelock barrel nut system and integral QD attachment points at the barrel nut round out the build, and the upper is compatible with AR-15 platforms.

Key Features

Brand Sons Of Liberty Gun Works
Model M4-L89 Upper Receiver Group
Type Upper
Caliber 5.56x45mm NATO
Barrel Length 14.5"
Handguard Length 13.75"
Muzzle Device ASR Flash Hider, pinned & welded
Finish Matte
Condition New
Compatibility AR-15

Highlights

  • 14.5" Liberty Fighting Barrel in 5.56 NATO
  • Pinned and welded ASR Flash Hider for a total length of 16"
  • 13.75" L89 handguard with seven-sided M-LOK slots
  • Forged upper receiver with matte finish
  • Drivelock barrel nut system
  • Integral QD attachment points at the barrel nut

Compatibility

This complete upper receiver group is compatible with AR-15 platforms.

Frequently asked questions

What is the total length of the upper with the muzzle device attached?

The 14.5" barrel with the pinned and welded ASR Flash Hider brings the total length to 16".

What handguard is included and what mounting system does it use?

It comes with a 13.75" L89 handguard featuring seven-sided M-LOK slots.

What barrel nut system does this upper use?

It uses the Drivelock barrel nut system with integral QD attachment points at the barrel nut.

What is the UPC for this upper receiver group?

The UPC is 657628673026.

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