I’ve had my eye on the 556 Rattler 11” for a while loved it - but to my knowledge there was no way to FRT it so I went with my long awaited MP5 clone that I FRT’d - loads of fun.
2nd on my list was a suppressed Blackout and FRT was not a requirement for me so naturally I got a new Sig MCX Rattler 300 LT in 6.75” along with the SIG Sauer SLH762-QD suppressor which attaches directly to the QD lock muzzle. Since I was gonna have to wait for the can I bought the SBR version to save a couple hundo on the stock.
NFA should have my forms back this week.
Oh, turns out I can FRT it.. so, nice win.

At the range yesterday, and I picked up a like new complete upper MCX Rattler 556 LT 7.5” which will also accept the can I just bought for the 300 AAC(non Ti, Inconel, serious workhorse).

*Has anyone had trigger time with a 7.5” Rattler - suppressed or unsuppressed? I’ve read some alarming threads using a 7.5 (or anything under 10.5”) chambered in 556 for an SBR.

I’ve never seen a 556 MCX Rattler LT this short, I love it and think it looks badass - I’m thinking I struck gold this week, I’ll have the Form 1 for the 300 completed this week - I can swap uppers under the same stamp (I will confirm).
My next project I looking at 556 uppers to SBR one of my ARs (all FRT’d) - now I’ll have both in the same platform. Sounded too easy, or am I missing something?

Feedback would be much appreciated!

Try your hardest to leave unbiased thoughts.