So I've come across a problem with using my Upgraded(used lightly) CYMA M14. It is shooting at 450 FPS on the dot which is the maximum FPS for sniper rifles at my local field SC Viper. But sadly, only BASR's are considered sniper rifles and my M14 is by their standard "illegal" despite shooting within the FPS limit and only semi-auto which is what they require(It dosent say in the rules it has to be BASR I only found this out by asking). The past couple times I've managed to lie my way in saying I was using .2's when in reality was using .3's, and playing dumb to pass the chrono! It's my only scrim-ready gun and I feel terrible about breaking the rules and lieing to the refs. I was recommended a "crawler barrel" by a friend to solve my problem which according to him is just a standard inner barrel with holes drilled into it. I was wondering if it would be possible to make a "crawler barrel and if so how? Or if there is an easier way to drop my FPS from 450 to 350-400 with out changing the spring (V7 gearboxes are real puta's to work on) what could i do? I need the gun shooting 400FPS or lower with .2's, I'm looking to get the max range and accuracy while meeting the requirements.