Re: Using my SDN-6 as a screw on can.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: MadKap</div><div class="ubbcode-body">Thought I'd check back in on this thread an ask:
Is there any precedent from the ATF allowing a perm-attached rail, maybe a monolithic style upper that goes further than a 16" barrel but having a shorter than 16" barrel below it to be considered 'not an sbr'? </div></div>
Again, talk to Chip to check all this out, I'm sure he hears it everyday. You could also talk to the guys at Rainier Arms. I bet they get even more questions about it. The guy that does their welding is also a Boeing welder and does phenomenal work --he blind pinned my Brakeout on a 14.5" and you really have to look to see the weld, it is that good. But I do have a couple other things to add now that my memory got jogged.
1. You can write ATF while you are waiting, you'll get your reply back fairly quickly all considered (weeks to a month maybe?). You need to send it to the Technology Branch in GA. Tell them exactly what you want to do, maybe even include a picture or two, and ask them for a document saying what it is or isn't. A quick search turned up folks that are doing this, using the tube as the barrel extension and they aren't monolithic either. I don't really see anything wrong with that as far as the law/cops go, but they live in this wierd fantasy land where up is down and left is right, so who knows? Better to get a letter for that.
Note that many people think that putting a Masterkey under an M4 makes it an SBS. But it doesn't, not according to ATF. I've seen a copy of that letter myself, and sure enough, they consider a Masterkey to be an AOW, still, BECAUSE THE RECEIVER IS DIFFERENT! Never would have thought of that one! It makes too much damn sense, huh? So it doesn't hurt to ask. Another note: the guy that did this still recommends to get your own letter for something that everyone is certain would be an illegal SBS otherwise.
2. I know this is good to go: I've seen folks use the short barrel, the long forend, and then they use another tube blind pinned to the barrel. Say a 5.6" tube to a 10.5"bbl, all under a long rail such that the tube barely comes past the end. This tube gives you the required length directly to the barrel and the suppressor fits inside of it, inside of the tube. I imagine it would work best with a thread on.
I'd really only consider this if you plan on keeping it on that rifle for good, because it really stranges it out when the can isn't on it. On the upside, perhaps you could find a double use as a golfball launcher! You also won't be able to reach the gas assy. if need be, but I guess you could cut it out when the barrel is shot out. Just make sure you get a FF tube that will come off over that other tube.
The other option is welding the suppressor on, but that isn't a good idea for a lot of reasons.
Oh, this can is MADE for the .300BLK! You'll like that. I actually have a 16" AAC upper that I got for a killer deal and I put it together with the can and an LMT Defender lower and they sang sweet music together with subs. If that wasn't hearing safe, it was close to it, and most certainly was for bystanders. With 5.56 M855, it sounds a lot like a .22 but a good bit louder. Haven't tried the 7.62 or 6.5 yet, but I reckon they'll be about the same but with a lower tone in 7.62.
And the wife? She was all smiles... I think she got a bigger kick out shooting them suppressed than I did! That is always a good thing. When she started nailing the 10 or 12" plate at 200m with no misses, she was hooked.
