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PolarStar Concave Spacer (PCS) Officially Licensed SCS High Performance Airsoft Hopup Spacer
by Jason T. Date Added: October 7, 2010
i installed this in my echo1 platinum edition m4 mated up with a systema bucking and a matrix tbb. the results have been phenomenal. it was a little tricky to install but if you remove the control arm from the hopup assembly and install it that way, its quite easy. im now getting a 4 inch grouping at 70 feet, even on full auto. buy this product.

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