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
LMT Defense 5.56 F-A BOLT CARRIER GROUP - R-L7D3
October 2026 on GunPartPicker
LMT Defense 5.56 F-A BOLT CARRIER GROUP - R-L7D3 ranked #98 of the 258 bolt carrier groups builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #25 of the 543 bolt carrier groups builders have added. Builds with this bolt carrier group are mostly chambered in 5.56 NATO (89%), mostly on mid-length gas (82%, then carbine-length 14%), and nearly all AR-15.
It was in stock most times we checked in October 2026, and today 2 of the 3 retailers we track have it in stock. Prices barely moved in October 2026, holding around $304.20, with no real sale all month. Buying today, the lowest price is $304.20 at Brownells, which matches the best price we saw in October.
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Frequently Built With
The part most often added in each category by the builds that include this one
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
Daniel Defense 16" 5.56 NATO CHF Mid-Length 1:7 Government Contour AR-15 Barrel
B5 Systems P-Grip 23 Black Composite
Forward Controls Design GBF .750 Low Profile Gas Block - GBF
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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