Here's is what I think bownutty. First let me say I haven't had the chance to shoot this broadhead as yet as our order has disappeared in shipment and we're still waiting for the 2nd set to arrive.

Now the thing to note here is--these heads, the 100 grain is 2.5" in diameter and the 125 grain is 4" in diameter. This means for our 'normal' hunting arrows which extends just about 1/2" beyond our rest--- forks, pass thru or launcher, cannot be used with these broadheads as the clearance to the riser will not be enough.
It then means we'll have to have our arrow insert beyond the front of the riser so as to accommodate these broadheads.
This is why these Gobbler Guillotine are actually set up for 'longer shafts' and the inventor of the Guillotine has also come up with a complete fletched feather shaft, 32" in length, that should be matched with their broadhead so as to properly control the flight.
Here's a link of an article that expands more on the Gobbler Guillotine and is worth reading---'some' of it, maybe not all.
http://www.cabelas.com/cabelas/en/te...=4000105040204