
Availability: In Stock
The NCStar AR15 Buffer Tube and Castle Tool is a multi-function armorer's solution for AR-15 and M4 platform builds and maintenance. If you're assembling an AR or replacing a collapsible stock, this combo tool handles the most common tasks—from castle nut installation to A2 buttstock security—without forcing you to buy separate specialty wrenches.
The tool features spanner wrench openings sized for AR15/M4 castle nuts, which secure your telescoping stock tube to the receiver extension. A dedicated A2 buffer tube wrench handles rifles using fixed stocks or earlier mil-spec configurations. The integrated flat blade screwdriver lets you torque down the A2 buttstock plate screws without hunting for a separate tool. Whether you're doing your first build or running an armorer's bench, having these three functions in one tool beats juggling a drawer full of single-purpose implements.
Drive compatibility with both 1/2" and 3/8" sockets means it works with whatever breaker bar or torque wrench you already have. It's the kind of straightforward, no-nonsense tool that belongs in any AR builder's kit—reliable, affordable, and purpose-built for the work that actually needs doing.
Yes. The spanner wrench openings are sized for the castle nuts that secure telescoping stock tubes to AR15/M4 receivers, which covers most modern collapsible stocks.
The tool is compatible with both 1/2" and 3/8" drive sockets, so it works with standard breaker bars, torque wrenches, and ratchets in either size.
Yes. The A2 buffer tube wrench function handles rifles with fixed stocks or earlier mil-spec buffer tube configurations, and the integrated screwdriver secures the buttstock plate.




SKU: 144597982 • Width: 6in • Height: 1in • Depth: 7.25in • Weight: 0.63oz





Availability: In Stock
The NCStar AR15 Buffer Tube and Castle Tool is a multi-function armorer's solution for AR-15 and M4 platform builds and maintenance. If you're assembling an AR or replacing a collapsible stock, this combo tool handles the most common tasks—from castle nut installation to A2 buttstock security—without forcing you to buy separate specialty wrenches.
The tool features spanner wrench openings sized for AR15/M4 castle nuts, which secure your telescoping stock tube to the receiver extension. A dedicated A2 buffer tube wrench handles rifles using fixed stocks or earlier mil-spec configurations. The integrated flat blade screwdriver lets you torque down the A2 buttstock plate screws without hunting for a separate tool. Whether you're doing your first build or running an armorer's bench, having these three functions in one tool beats juggling a drawer full of single-purpose implements.
Drive compatibility with both 1/2" and 3/8" sockets means it works with whatever breaker bar or torque wrench you already have. It's the kind of straightforward, no-nonsense tool that belongs in any AR builder's kit—reliable, affordable, and purpose-built for the work that actually needs doing.
Yes. The spanner wrench openings are sized for the castle nuts that secure telescoping stock tubes to AR15/M4 receivers, which covers most modern collapsible stocks.
The tool is compatible with both 1/2" and 3/8" drive sockets, so it works with standard breaker bars, torque wrenches, and ratchets in either size.
Yes. The A2 buffer tube wrench function handles rifles with fixed stocks or earlier mil-spec buffer tube configurations, and the integrated screwdriver secures the buttstock plate.
SKU: 144597982 • Width: 6in • Height: 1in • Depth: 7.25in • Weight: 0.63oz



