Bore Tech Rimfire Bore Guide - AR-15 / M&P 15-22 RF The Bore Tech Rimfire Bore Guide for AR-15 and M&P 15-22 rifles is precision engineered to properly align your cleaning rod with the bore, preventing damage to both the firearm and cleaning equipment while ensuring consistent, effective cleaning. CNC machined from rugged, solvent-resistant synthetic polymer, this bore guide eliminates rod drag along the ejector, preventing scratches, wear, and unnecessary stress on critical components. The guide seats securely against the rear of the barrel and chamber, minimizing solvent leakage into the action and protecting sensitive internal parts. A tapered rear opening allows smooth jag and brush alignment, while the widened solvent port enables fast, controlled solvent application. Built for long-term durability and precision, this bore guide delivers safe, repeatable cleaning performance and long service life. Bore Tech Rimfire Bore Guide Length: 10.5 InchesBore Tech Rimfire Bore Guides will add approximately 10.5 inches to the length of the barrel when cleaning. Make sure your cleaning rod is long enough to accommodate.