Knock Out Brass Barrel Extension
thingiverse
These adapters will help you modify your Nerf Knockout for half-length darts. The 17/32 brass piece friction fits into the KOB_Adapter_1732, which in turn friction fits into the stock Knockout with air restrictor removed. The KOM_L and KOM_R are split barrels that can be used to nest the brass together, requiring some sanding and/or electrical tape to achieve a precise fit for 9/16 brass.
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