it depends on what you are using your gun/ floatline for. if you are planning to shoot huge fish in blue water, using your float and line to fight the fish. in this case you want the breakaway set up, so you can keep your gun with you and still have it while fighting the fish. if you tie the line to the gun and a big one swims away or down, your gun is part of the chain, you dont want that, if a shark swims up at you there wont be anything to bump him off. probably, you are planning to use the floatline for safety. and so you wont lose your gun. i guess this is a good idea. it is safer for sure, but to be honest, i have only met one person in my life who uses a float line in water shallower than 40 feet. your gun is mostly a shallow water gun,or for scuba, either way, you may just want to skip the float line all together. they tend to get wrapped up in stuff,(mosly you) if you do get one , get a good riffe one, or equal. a cheap rope style one gets tangled really easy. on my reef gun, i use a reel. this allows me to swim tangle free, and if i hit a fish that holes up, i can play out line and take the gun up with me, while i breathe up on the surface, and prepare to dive down to retrieve the fish. for blue water, i use a breakaway set up. neptonicsystems.com. i use his floatline adapter, makes it really easy and keeps the tuna clip away from my hand,(annoying clip!!!)good luck with your ab biller,(good solid gun for the reef) it is what i started with, and most other divers i know, also.