The 1.5 is the 1.0 with a standoff hood to make it long enough to get a 14.5" barrel to 16" when permanently attached. The 1.5 comes pre-drilled for a blind pinning and welding, so it is a great choice if you want to use a non-NFA 14.5" barrel.
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I own a few TTB's and I purchased them due to the fact that I own (2) NT4's and I liked the fact that they act as a sacraficial blast baffle. I have shot with the BattleComps and I personally feel that they are just as effective in reducing muzzle rise compared to the TTB at a lower price point. If I didn't already own the NT4's, it would be hard pressed for me to justify the cost of the TTB when I could get the same results with the BattleComp or even the PWS FSC556..
caporider:
Thanks, I got the 1.5 mixed up, I was thinking it was an improved version already!
epete:
My concern exactly! I will send off an email to ADCO just to double-check.
Guys, thanks for all the replies and input.
I just sent it off to ADCO to have the KAC TT put on. I went with the logic that since I had it I might as well put it on. Had I not already bought it I think I would've used the BattleComp.
Plus now it'll enable me to shoot 2" groups at 1000 yards with its magic powers.
I did ask the guys at ADCO and they said there were no issues with pinning the Inconel. Fingers crossed.......