Shilen Select Match 22 Rimfire 16 twist Ratchet rifled 4 groove SS M24 28" Modified 4" x 1.20" shank .900" @ 26" - no fluting available for Shilen barrels.

22 Rimfire 16 twist 4 groove SS .900 straight 27"

22 Rimfire 16 twist 5R SS Remington Varmint 27" button rifled