Alfa Precision · Polygonal Barrel · Blank · Cal .25 (6.35mm)

This barrel blank is manufactured for gunsmiths and precision airgun builders requiring consistent internal ballistics performance in .25 caliber. The polygonal rifling profile is machined to reduce pellet deformation and gas blow-by, contributing to improved velocity consistency and shot-to-shot accuracy.

Technical Benefits

• Polygonal rifling profile: minimizes friction between pellet and bore surface, reducing wear and improving seal consistency.
• 10 grooves (N=10): polygonal groove configuration optimized for reduced pellet deformation and consistent sealing.
• 406mm twist rate (1:16): calculated for stabilization of .25/6.35mm caliber pellets at standard PCP velocities.
• Available in 15mm or 16mm OD: compatible with a range of action and shroud configurations.
• 700mm length: supports extended barrel time for efficient air-to-velocity conversion.
• Unfinished blank: supplied without external profiling, threading, or crowning, allowing full customization to the builder's specifications.

Specifications

Installation requires machining, fitting, and finishing by a qualified gunsmith. This is a raw precision component, not a finished, ready-to-install barrel assembly.