This heavy duty plunger tube is manufactured to correct dimensions for proper fit and function on your 1911 pistol. It features CNC machining from bar stock, with a correctly drilled and polished interior to provide smooth operation and correct plunger pin positioning. The staking legs are counter bored to the correct size to properly upset when staked, no more drilling out undersized holes. Available in blued carbon steel or stainless steel, this plunger tube will last a lifetime when properly installed.