Lewis Machine & Tool

LMT 5.56 Chrome Lined M4 AR-15 Barrel With A2 FSB - 14.5"

All Lewis Machine & Tool barrels
Lewis Machine & Tool Lmt 5.56 Chrome Lined M4 Ar-15 Barrel With A2 Fsb - 14.5" - Barrel for AR-15 - view 1
Lewis Machine & Tool Lmt 5.56 Chrome Lined M4 Ar-15 Barrel With A2 Fsb - 14.5" - Barrel for AR-15 - view 2
Lewis Machine & Tool Lmt 5.56 Chrome Lined M4 Ar-15 Barrel With A2 Fsb - 14.5" - Barrel for AR-15 - view 3
Lewis Machine & Tool Lmt 5.56 Chrome Lined M4 Ar-15 Barrel With A2 Fsb - 14.5" - Barrel for AR-15 - view 4
Lewis Machine & Tool Lmt 5.56 Chrome Lined M4 Ar-15 Barrel With A2 Fsb - 14.5" - Barrel for AR-15 - view 5
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Lewis Machine & Tool

Overview

The LMT 5.56 Chrome Lined M4 AR-15 Barrel features a 14.5-inch length, optimized for compact builds while maintaining excellent ballistic performance. With a 1:7 twist rate, this barrel is designed to stabilize a variety of bullet weights, making it versatile for different ammunition types. The carbine-length gas system ensures reliable cycling in semi-automatic configurations, and the Manganese Phosphate coating provides added durability. This barrel is commonly found in short-barreled rifles and tactical setups.

Specifications

MPNLMP10406
CoatingManganese Phosphate
Thread Pitch1/2x28
Caliber5.56 NATO
Gas System LengthCarbine
Barrel Length14.5
Twist Rate1:7
Barrel ProfileM4

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$428
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September 2026 on GunPartPicker

LMT 5.56 Chrome Lined M4 AR-15 Barrel With A2 FSB - 14.5" ranked #41 of the 250 barrels builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since July 2026. All time, it ranks #145 of the 839 barrels builders have added.

Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $428.40, so there haven't been real sales lately. Buying today, the lowest price is $428.40 at Primary Arms, which matches the best price we saw in September.

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