introducing the Hadron Airsoft Designs Tac Nub, for the Silverback Tac41. It's been a long time coming, and this one has had some considerable testing. The Hadron "Tac" Nub, is a precision nub. CNC made in aluminium and finished in matt red. Using our renowned H plate pattern deformation profile on the nub underside, we get the best out of the leading hop rubbers on the market. BB weights tested from 0.2 to 0.5, from leading brands including Longbow, BLS etc. The Snipermechanics 60 GBB build I personally use, with the Silverback GBB hop unit, and Snipermechanics cylinder head/WASP offers next-level performance, accuracy and reliability. The Hadron Tac nub works with the stock AEG chamber and also the GBB chamber from Silverback.