SMK QB/TH 78 S Steel A Frame Nylock nut and bolt X 1 set
1 X Stainless Steel Nylock Nut and Bolt for the A frame. Note this is a Stainless Steel Nylock nut and Bolt for extra strength and will not work loose.
The photo shows our Stainless Nut and bolt compared to the standard
one. Replaces the bolt fitted to the Deluxe or Thumb hole 78 that has the Aluminium A Frame, not suitable for the basic one that has to be ground down thin in the middle which weakens it, you can grind it down if required but it will weaken it. what they have done for the QB is machine a small groove through the barrel to clear the bolt.
If you have the basic XS 78 Plastic A frame (as fitted to the XS78) it is best to change it to our Aluminium one shown on this site. This will hold it more securely for better accuracy. This is one of the reasons that some guns have suffered with poor accuracy.