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(Discontinued) PolarStar Concave Hop Up Spacer
[06446 / Model-PCS]
$7.00
by W WELDON verified buyer Date Added: Wednesday 02 June, 2010
Product Information:
Concave hop up spacer/nub. The concave shape is the same contour as a BB this allows the nub to protrude through the barrel window with a concave shape that will fit perfectly over your BB. This design will make left or right spin unlikely because the nub should center the BB and only apply back spin. A copy of the SCS nub from Shredder (E.D.G.I.) Seems to work pretty good for me so far with a systema bucking and a tight bore.

Pros:
1. No left or right spin should be possible if set up correctly (see shredders webpage)
2. Should allow for high accuracy a fine adjustability

Cons:
1. Make sure your hop up (where the strike chamber pushes the nub through and into the barrel) and your barrel window (rectangular hole in your barrel) are rectangular (not rounded) and will allow the nub to fit through. Test this before you put everything together. This may require some fine filing. (see shredders webpage if you need help) Not realy a con just make sure when buying those parts or get a precision file set.
I'll give it 5 stars

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