LMT Defense 5.56 F-A BOLT CARRIER GROUP - R-L7D3
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Lewis Machine & Tool
Overview
The LMT Defense 5.56 F-A Bolt Carrier Group is designed specifically for the 5.56 NATO caliber, ensuring reliable cycling and performance in your AR-15 build. This bolt carrier group integrates seamlessly with a variety of upper receivers, providing the necessary components for proper operation, including the bolt, carrier, and gas key. It's a solid choice for builds focused on precision shooting or tactical applications, as it offers the durability and reliability needed for consistent performance.
Specifications
August 2026 on GunPartPicker
LMT Defense 5.56 F-A BOLT CARRIER GROUP - R-L7D3 was the tenth most added bolt carrier group on GunPartPicker in August 2026, behind the Wilson Combat M16 Bolt Carrier Assy 5.56 NATO Polished Nickel Boron, with about 2% of all bolt carrier groups added to builds. Up from #19 in July. Builds with this bolt carrier group are nearly all chambered in 5.56 NATO, nearly all on mid-length gas, and nearly all AR-15.
It was in stock most days in August 2026, and today 2 of the 3 retailers we track have it in stock. Prices barely moved in August 2026, holding around $247.99, so there haven't been real sales lately. Buying today, the lowest price is $304.20 at Brownells, above August's low of $247.99, so a better deal may come back.
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Frequently Built With
The part most often added in each category by the 20 builds that include this one
Daniel Defense 16" 5.56 NATO CHF Mid-Length 1:7 Government Contour AR-15 Barrel
AMBIDEXTROUS 5.56MM CHARGING HANDLE
Geissele Automatics Super Semi-Automatic Enhanced SSA-E Two Stage AR-15 Trigger .154"
Sons Of Liberty Gun Works AR-15 Stripped Lower Receiver - Rebellious Stripes
B5 Systems Type 22 P-Grip - Black
Forward Controls Design GBF .750 Low Profile Gas Block - GBF
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