vsr10 改裝難題

我買左成套既pss10 既cylinder, spring guide, 110sp spring, piston, cylinder head
但係我裝晒之後個cylinder head 扭整都扭唔實
我裝上之槍之後上鏜個下會cylinder head 會彈開左...即係拆左出黎
咁既問題已經有5次都係咁....無論水平之槍定係向下支槍黎上鏜都係咁
就算上到彈個cylinder head 唔彈出黎, 間中仲會有嘔彈既問題
會唔會係因為條spring 太硬?
請各位師兄幫幫我....謝謝