The Smith & Wesson M&P AR-15 Essential Parts Kit keeps the small but critical components you need within arm's reach. Anyone who's built or maintained an AR-15 knows the frustration: a pin rolls across the workbench, a detent spring disappears into the carpet, and suddenly you're hunting through your bench drawer or making an emergency parts run. This kit collects those easy-to-lose pieces in one compact package, so you can stay focused on your build without interruption.
Whether you're assembling an upper receiver, swapping out springs, or rebuilding a lower, having duplicates of commonly needed pins, springs, and detents saves time and headache. Store the kit in your gun room, range bag, or on the bench—it's sized for real-world access and keeps your essential spares organized and ready. Built to Smith & Wesson M&P specifications, these parts are sized and shaped for M&P AR-15 platforms.
This is practical insurance for any AR builder or tinkerer. Instead of stopping mid-project to track down a single spring or pin, you pull from the kit and keep working. It's the kind of small solution that prevents small problems from turning into big ones.
This kit is designed for Smith & Wesson M&P AR-15 rifles and builds. Parts are sized and specified to M&P standards.
Yes. First-time builders especially benefit from having spare pins, springs, and detents on hand. These components are easy to misplace, and having backups keeps your build on schedule.
The kit includes pins, springs, and detents—the small fasteners and components that are most commonly lost or need replacement during AR-15 assembly and maintenance.
Smith & Wesson
