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PolarStar Concave Spacer (PCS) Officially Licensed SCS High Performance Airsoft Hopup Spacer
[Parts-SCW-SCS]
$6.99
by banjo c. Date Added: Thursday 02 February, 2012
This is probably the best upgrade hop-up nub you can get other than the R-hop (which is being phased out due to how easy it is to make one yourself). As demonstrated in the pictures, the nub conforms the hop-up to the shape of the BB and provides more even backspin. Your standard nub is flat and relies on force to conform the hop-up bucking, which is inefficient.

I've built several guns with this nub included, and I always get great results when I combine it with a Madbull 6.03mm barrel and an original Systema hop-up bucking (the black one, not the clear one). Highly recommended for all FPS and ROF builds.

Rating: 5 of 5 Stars! [5 of 5 Stars!]
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