quote:

Originally posted by LDD:

quote:

Originally posted by Wino:

quote:

Originally posted by LDD:

quote:

Originally posted by Wino:
If I wanted to SBR it by attaching a stock, does the frame of the gun need to be stamped or can the (removable) stock be stamped?

Technically, any part of the gun that is readily visible can be stamped. People usually engrave the receiver since that is the part that will never change, but if you never remove the stock, you can engrave on the stock, trigger guard, etc.

I bought a

So the idea of engraving the stock is it's only an SBR when the stock is attached. After SBRing it, can I unattach the stock and legally not have the weapon be engraved? If so I guess if I wanted to use another stock I would need to engrave it too...

Remember I said you can engrave a non-receiver part as long as you never remove that non-receiver part. People never remove the receiver from the receiver so that's the most commonly engraved area.

The serial number of the gun is recorded in the NFA database, so even though it's not in the config of an SBR, the serial number is still registered as an SBR. Taking the stock off doesn't remove it from the registry.

So being on the registry is more important than the actual specifications of the firearm?

Are you saying it needs to be stamped forever even if it is no longer an SBR?

Dude,

Why don't you do a google search and BATFE will tell you exactly what you need to do.

Thanks.

quote:

Originally posted by tpd312:
Dude,

Why don't you do a google search and BATFE will tell you exactly what you need to do.

Thanks.

Wow, you come in and almost demand updates like a child with no patience from LDD like he has nothing better to do than immediately get updates for you on the MPX, yet he asks a few questions about SBR'ing and all of a sudden, dude, go google it. How about you do the same for updates on the MPX, DUDE.

I do check google on a daily basis for updates. I wasn't trying to be rude or to say it in a negative way, I just put things out short and to the point. He might get all his answers answered by looking it up.

quote:

Originally posted by Wino:
So being on the registry is more important than the actual specifications of the firearm?

Are you saying it needs to be stamped forever even if it is no longer an SBR?

If it is in the registry, removing the stock does not remove the serial number or attached info from the registry.

If you wish to permanently remove an SBR from the registry, you can send a letter formally requesting its removal. You have to put it in a non-NFA configuration and you don't get your 6 months or $200 back.

quote:

Originally posted by LDD:

quote:

Originally posted by Wino:
So being on the registry is more important than the actual specifications of the firearm?

Are you saying it needs to be stamped forever even if it is no longer an SBR?

If it is in the registry, removing the stock does not remove the serial number or attached info from the registry.

If you wish to permanently remove an SBR from the registry, you can send a letter formally requesting its removal. You have to put it in a non-NFA configuration and you don't get your 6 months or $200 back.

I did this with a SBS a few years ago, so I could sell it. You don't actually get the serial number removed from the registry. They just update its specifications. If someone calls the serial number in to the ATF, it will be in there but should show it as a full size gun again.

LDD, thanks for answering all my tedious NFA questions!

I plan on heading over to Silencer Shop here in Austin this week to plan out SBRing and suppressing a future MPX purchase. Hope this thread helps some other NFA virgins besides me.

Wino,

You thought about just buying an already made from the factory MPX SBR? If you decide later, you can still remove the SBR status from the NFA registry. I know because I also did this with a factory Benelli M4 SBS.

quote:

Originally posted by tpd312:
Wino,

You thought about just buying an already made from the factory MPX SBR? If you decide later, you can still remove the SBR status from the NFA registry. I know because I also did this with a factory Benelli M4 SBS.

That's a good point. I guess it's a matter of timing. Advantage of buying as a pistol lets me shoot with it while waiting for the stamp. Buying as an SBR has the advantage of not needing engraving.

Do I have that right?

Has Sig said anything about the timing of availability of pistol and SBR variants yet?

Correct, no engraving with a factory SBR. My understanding that once the MPX is released, SBR should be available.

Is it to early for any kind of update?

quote:

Originally posted by tpd312:
Is it to early for any kind of update?

Probably. I was talking to our SIG rep today and when I half jokingly asked what the release date was he grimaced and said never. It's not that he thinks they are never coming out. He just has no idea when it will come out and has gotten fed up with giving out dates that have so far all turned out to be wrong.

I'm narrowing down my options:
1. SIG MPX SBR (ATF Controlled) with Side-folding Stock and Suppressor:

<IMG class="inline_image" SRC="[IMG]http://img.photobucket.com/albums/v297/d2randall%40cox.net/Guns/SIG%20MPX%20SBR%20SS%20SFS_zpswvonfzwb.png"> [/IMG]
http://img.photobucket.com/alb...0SFS_zpswvonfzwb.png

2. SIG MPX PSB (Non-ATF Controlled):

<IMG class="inline_image" SRC="[IMG]http://img.photobucket.com/albums/v297/d2randall%40cox.net/Guns/SIG%20MPX%20PSB%20SS_zpsaxqoqgiz.png"> [/IMG]
http://img.photobucket.com/alb...20SS_zpsaxqoqgiz.png

Opinions Requested: Would it be more beneficial (i.e. future versatility and adaptability) to purchase the SIG MPX SBR having it ATF registered as a "SBR", and then purchasing various stock options (PSB, Side-folding, Telescoping) for various carry options? Since the MPX would be ATF SBR registered, it is always a SBR regardless of stock or method of shouldering?

I usually end up upgrading my firearms with new furniture and innovations. The SIG MPX has a solid design foundation to support such future upgrades. But, innovation and the ATF don't always mix; therefore, I don't want to be hampered by future ATF regulations as I modernize the SIG MPX having it already SBR registered would be a benefit.

Opinions Welcomed. TIA.

If you ever plan to put the retractable or side folder (without the arm brace), then yes make an SBR. If you are fine with just the arm brace, then as long as you use it as "designed" you are legal. Even if you never shoulder the retractable stock, it is still illegal to mount it unless said weapon is a registered SBR. That's what makes the arm brace cool, even though not my thing, I am going the SBR route.

March 27th dated review of a production MPX:

http://www.thetruthaboutguns.c...ig-sauer-mpx-pistol/

Interesting quote: "The gun has been delayed for months due to an engineering issue that has been resolved for 9mm but not quite yet finished for everything else. The decision on SIG SAUER’s part is that rather than keeping the gun on hold indefinitely, they have decided to release the “Version 1″ of the MPX — available only in 9mm with no guarantee that 40 S&W and .357 SIG will ever work in it — and have a “Version 2″ available sometime next year with all the bells and whistles."

quote:

Originally posted by lcambre:
March 27th dated review of a production MPX:

http://www.thetruthaboutguns.c...ig-sauer-mpx-pistol/

Interesting quote: "The gun has been delayed for months due to an engineering issue that has been resolved for 9mm but not quite yet finished for everything else. The decision on SIG SAUER’s part is that rather than keeping the gun on hold indefinitely, they have decided to release the “Version 1″ of the MPX — available only in 9mm with no guarantee that 40 S&W and .357 SIG will ever work in it — and have a “Version 2″ available sometime next year with all the bells and whistles."

The other disturbing sentence to add to the above quote in the TTAG article is: "They hope to be able to provide a conversion kit to get the “Version 1″ MPXes up to the “Version 2″ caliber change spec, but again there’s no guarantee."

I would appreciate any further insight from the Sig folks in to these barrel conversion issues (Version 1 vs Version 2, expanded caliber conversion kits?) and what is really meant by works like "hope" and "no guarantee"?

I am glad I got my money back from pre-order.

From what I was able to gather, the V1 and V2 just has to do with the piston system. 9mm is no issue but when shooting the hotter 40/357, they are having some failures to do with the piston system. I plan on only going with 9mm, so no issue for me, but I do hope they correct the piston issue to give folks an option. Maybe Jeff could tell us more if this is the issue.

quote:

Originally posted by tpd312:
From what I was able to gather, the V1 and V2 just has to do with the piston system. 9mm is no issue but when shooting the hotter 40/357, they are having some failures to do with the piston system. I plan on only going with 9mm, so no issue for me, but I do hope they correct the piston issue to give folks an option. Maybe Jeff could tell us more if this is the issue.

It has to do with the chamber length.

.40 and .357 SIG barrels requiring the longer chamber & issues associated with accommodating that in the same receiver that was dimensioned around a 9mm barrel.

So that would mean they might have to build a whole new upper for the 40/357?