We have made these out of aircraft grade 4042 aluminium bar then cerokoted orange for a very hard wearing Finnish  
These make for an easier and quicker  pull back and fore and look far better the  standard plastic Blaser knob

Easy to fit just unscrew your old knob and screw the new one on

Weight  of the knob is only 20grms  

PLEASE NOTE WE ARE NOT AFFILIATED WITH BLASER IN ANY WAY OR ARE A BLASER DISTRIBUTOR WE MANUFACTURE QUALITY  AFTER MARKET BOLT KNOBS  FOR THE MODEL RIFLES ABOVE