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I own a fine Revo....Should not mess with length of barrel...to many variables...there are those that have tried & they knew what they were doing but had cycle issues....Very balances a factory for Blow Back operation...any adj can be highly critical in blow back guns. Always remember when a shorter barrel is applied you May get loss of FPE...Mine @33FPE is great! Oh and Do-Not lube pellets as the lube can get into the blow back under air tub.
Please send me info on Micro Burst.