APA's fat bastard brake is VERY EFFECTIVE but, it's not a clamp on style like the FTE. You could call Jered and see if he'll whip you one up for your dimensions.
The dual chamber break on my AWSM which is familar to the FTE works well. My gf enjoys shooting it. But you will drive people off the range if they are next to it.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cut</div><div class="ubbcode-body">But you will drive people off the range if they are next to it.
Cut </div></div>
You say that like it is a bad thing
+1 on the APA FB Brake- they aren't that big normally, but he has the capability to make such an monster and it would be even more effective than the standard size...