Shooters pursue the MSR mod for several compelling reasons:

Remember: A successful MSR mod should feel invisible. The rifle just runs smoother, shoots tighter, and responds faster. If you notice the modification while shooting (e.g., a gritty feel or unsafe reset), you have failed.

Use a felt wheel on a Dremel (low speed) or a cloth rag to apply polishing compound to the now-smooth surfaces. Buff until shiny.

Often used alongside MSR mods to verify if changes to prefetcher registers are actually improving data throughput. The Verdict