Power Custom Upper Lower Receiver Shims for AR15

The Power Custom UPPER/LOWER RECEIVER SHIMS are precision-made AR-15/M16 receiver shims designed to improve alignment and proper fit between upper and lower receivers, ensuring consistent bolt alignment, reduced wear, and reliable operation across a range of components. Crafted to support AR-15 applications, these shims help shooters fine-tune headspace and cheek weld setup by providing clean, stable spacers that maintain a precise plane of interaction between receivers. Built with durable mater