Quote:
Originally Posted by St. Ides
Its just the inner barrel length, you already have CQB length barrel and therefore don't really need a new one....besides you should be upgrading to a tightbore barrel anyways.
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TB barrels on a GBBR push my FPS through the roof and i can't use the gun anywhere.. even with an npas installed on my Scar i can't get the FPS below 400 with a TB installed.