[durtboy17]

Hello fellow snipers. This may seeem like a very dumb question, but I just got a PDI hop up chamber for my MK96 and I need to be educated on where the nub goes and what they are used for.. Please, any info will help.. Thank you,.. Happy sniping

 

[teheelmao1]

look up a guide on youtube, watch them all, the nub makes an indentation on the bucking, causing your 'hop' and puts spin on the bb to help it go farther

 

[ryan]

The concave shaped nub with the blue spacers is where your PDI (should be clear) nub will go.