Sons of Liberty Gun Works M4-L89 CHF 5.56 NATO Barreled Upper Receiver - 10.5"
All Sons of Liberty Gun Works upper receivers
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Sons of Liberty Gun Works
Overview
The Sons of Liberty Gun Works M4-L89 CHF 5.56 NATO Barreled Upper Receiver is a complete assembly designed for AR-15 builds, featuring a 10.5-inch barrel optimized for 5.56 NATO ammunition. This upper receiver is engineered with a carbine gas system, which ensures reliable cycling and consistent performance, making it suitable for a variety of shooting applications. Builders typically incorporate this upper in compact, maneuverable setups that benefit from the shorter barrel length while still delivering effective ballistics.
Specifications
Sons of Liberty Gun Works M4-L89 CHF 5.56 NATO Barreled Upper Receiver - 10.5"
Build history on GunPartPicker
Builders have been adding the Sons of Liberty Gun Works M4-L89 CHF 5.56 NATO Barreled Upper Receiver - 10.5" to their builds on GunPartPicker since February 2026. All time, it ranks #946 of the 1,683 upper receivers builders have added.
It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $819.38 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Sons of Liberty Gun Works Enhanced Bolt Carrier Group - 5.56 NATO/300 Black - A100 Bolt - Nickel Teflon Finish
EOTECH EXPS3-0 Holographic Weapon Sight
Olight ODIN Mini 1250 Lumen Rechargeable Rail Mount Flashlight - Black
Magpul RVG Rail Vertical Grip - Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 1 →Builds in the community that include the Sons of Liberty Gun Works M4-L89 CHF 5.56 NATO Barreled Upper Receiver - 10.5"
| Build | Parts | Total |
|---|---|---|
 | 20 | $4185.44 |
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