apollolanding, on Oct 25 2008, 01:46 PM, said:
The Mad Bull Shark 60 Degree Silicone bucking will fit if you cut about 3-4mm off of the end. Here's what I did using the stock barrel (and plan to do with my Prommy TB coming soon). Remove the barrel and hop up chamber, turn the hop up all of the way down. Clean all lube off of the exterior of the hop up end of the barrel using a water based degreaser. Cut the Mad bull bucking by squeezing the bucking flat with a metal ruler. use an Exacto knife and push down through the bucking to cut it. Do not use scisors as they will not make a straight cut. Slide the bucking onto the degreased barrel end. Now lube the heck out of the exterior of the bucking and twist as you push it into the hop up chamber. Make sure not to displace the nub when you insert the barrel (if you left the hopup on, the nub WILL pop out). As previously mentioned, look through the barrel and turn the hopup on and off to ensure that the nub is centered in the barrel slot. Lube the entire barrel length and reinsert it into the outer barrel. Close the patient up. I used the H nub that came with the Shark. With the H-nub I hardly have to dial up the hopup to get the desired spin (about half the abount as the stock bucking). While not a "plug and play" operation, anybody with the slightest mechanical inclination can do it. If you can put a model airplane together, you can do this. Oh I am showing my age there... You see there used to be these things called models. They were plastic and you put them together using a really stong smelling glue...
I have the same bucking and I found that it's not the nub that gives it a good spin, it's the bucking. I'm assuming since the silicone bucking is so flexible, it is easily pushed down, therefore you don't need to turn the hop up....um up much lol
I tried the rubber bucking and it did not get the same results, so I think it's due to the silicone bucking's flexibility.