Ruger M77 Zytel or Boat Paddle or Skeleton Stocks All Weather 100% Stainless Steel in good condition with wooden inserts. The Zytel Stock rifles were discontinuled in the year 2000 for center fire and 2005 for rim fire, so if you can find one in good condition, This is the kind or gun you will pass down to your kids and grandkids!!! The M77 was retooled almost entirely and reintroduced in 1991 as the Mark II. The safety, bolt, and trigger were completely redesigned. The claw extractor was retained, but the bolt face was opened up to allow controlled-round feeding. The plunger ejector was replaced with a Mauser style blade ejector. Finally, a three-position safety allowed the bolt to be operated while the gun was still on safe, making unloading of the rifle less hazardous. Ruger also eliminated the adjustable trigger that came stock on the original M77.