SKU: LUTHBS-A2K
UPC: 812058032519
MPN: BS-A2K
The Luth-AR A2 Buttstock Kit delivers everything needed to install or replace a fixed-length stock on any mil-spec AR-15 lower receiver. This complete surplus A2 stock kit appeals to shooters who prefer the proven geometry and solid cheek weld of the original M16A2 design over collapsible alternatives. The package includes the A2 buttstock, buffer tube, buffer, recoil spring, aluminum spacer, and mounting hardware. For builders assembling rifles with a traditional profile or competitors requiring fixed stocks under certain match rules, the Luth-AR kit simplifies sourcing with matched components from a single manufacturer.
Luth-AR designed this kit around mil-spec dimensions, ensuring compatibility with standard AR-15 lower receivers without modification. The A2 buttstock itself provides a 13.5-inch length of pull when installed, matching the original military specification that generations of shooters have relied upon for consistent mounting. The included aluminum spacer seats between the buffer tube and receiver extension, while the A2 upper buttstock screw secures the assembly. Unlike collapsible stocks that can introduce slight play at the adjustment points, the fixed A2 design locks solid against the receiver, eliminating wobble during rapid strings of fire. The polymer construction resists impact and temperature variations encountered in field conditions. Each component in the kit carries Luth-AR part numbers, making future replacement straightforward through parts and accessories channels.
This buttstock kit suits several practical applications: restoring a classic rifle configuration, building a competition gun where fixed stocks are mandated, or simply preferring the rigid feel that collapsible designs cannot match. The A2 profile also works well with traditional shooting positions where the longer length of pull accommodates heavier clothing or body armor. Installation requires basic armorer tools and takes under fifteen minutes for anyone familiar with AR-15 assembly. Pair this kit with quality grips and stocks from our inventory to complete your lower receiver build with components that meet mil-spec requirements.
The kit contains a complete fixed-stock assembly: the A2 buttstock, mil-spec buffer tube, carbine buffer, recoil spring, aluminum spacer, and A2 upper buttstock mounting screw. All components are manufactured by Luth-AR and designed to work together without additional parts.
This kit fits any mil-spec AR-15 lower receiver. The buffer tube and spacer dimensions match military specifications, so no receiver modification is required. Commercial-spec receivers may have fitment differences and should be verified before purchase.
The installed A2 buttstock provides approximately 13.5 inches of length of pull, matching the original M16A2 military specification. This fixed length works well for most adult shooters and accommodates use with body armor or heavy outerwear.
Fixed A2 stocks eliminate the play found in collapsible designs, providing a solid lockup against the receiver. They also meet competition requirements where adjustable stocks are prohibited and offer the classic military rifle profile many shooters prefer.
Installation requires a castle nut wrench or armorer's wrench, a receiver extension tool or padded vise block, and a screwdriver for the buttstock screw. Standard AR-15 assembly tools handle the complete installation in approximately fifteen minutes.
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