Quote:
Originally Posted by turok_t
I got a firefly hop up soft for my TM 5.1 and when I look into the hop up rubber, it has 2 square notches with a ditch in between (pic below). The stock hop up rubber that came with my 5.1 does not have these notches and has a smooth interior instead. Did I get the right hop up rubber? If so, how do the 2 notches spin the bb? It looks like it would obstuct more than spin the bb.
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Firefly only makes this type of hop up rubber for Marui gas pistols & vsr-10.
The 2 notches spin the BB in a similar manner to the Marui one... except instead of contacting the BB on one point at the top, it spins it at two points adjacent to the centre. It keeps the BB more stable this way.
If you can get a finger in there to feel it, the nubs are very flexible. It would obstruct the BB as much as the original nub would.