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aa hop var

  1. VSR Rifles
    Tuning an Action Army hop chamber [Solved] After plenty of research mainly on this forum I decided to buy the following for my GSPEC. AA hop unit AA 430mm 6.03 non-bridged barrel Maple Leaf AutoBot bucking (60 degrees) Maple Leaf concave nub [link] Barrel spacers; two in the barrel and one in...