AR 15 Upper Receiver Vertical Insert Mount - Slatwall | Rifle Holder Storage Rack glock 41 you may need to use

you may need to use pliars to snap off the hooked portion on the bottom of the killflash

Comes with support piece to rest under the front of the rifle (the picture of the 3D model shows what it looks like)

but either works great

or warranted by Wall Control or Gun Pegboard or IKEA or Vaultek or Lockdown or Peglock or Staccato

here for pistols

AR 15 Upper Receiver Vertical Insert Mount - Slatwall | Rifle Holder Storage Rack glock 41 you may need to useSimple, Secure Mounting: Attaches to Slatwall via hook on the back of the mount and included printed T nut and screw on bottom of mount. Insert printed nut into Slatwall slot underneath where you will place the hooked part of the mount. Rotate the nut 90 degrees to lock it into place. Then hook the mount into place and insert the screw through the bottom hole and into the printed nut. Tighten the screw to secure the mount to the slatwall. Multiple