MasterPiece Arms 5.7×28 SBR

MPA 5.7x28 SBR

MasterPiece Arms is now making a short barrel rifle (SBR) version of their 5.7×28 gun.  The new SBR has a threaded 8″ barrel for the included muzzle brake, or for the MPA Suppressor (which is shown in these photos but does not come with the gun).  Yes, all NFA rules do apply.

The MPA57SST-SBR (aka MasterPiece Arms 5.7×28 SBR) comes outfitted with an MPA short aluminum quadrail and a Strike Industries foregrip.  Based on the photos, the foregrip appears to be the “Cobra Tactical” that normally retails for $25.


New 2009 SHOT Show Rumor: 4.6x30mm Revolver? Michael Bane says Yes


Michael Bane mentioned in a recent blog post that he had information about a new 4.6x30mm revolver that would be introduced at the 2009 SHOT Show.  Bane posts:

BTW…Wednesday’s podcast will have some thoughts on choosing a gunsafe as well as the skivvy on the new 4.6 X 30 revolver to be introduced at SHOT!

The 4.6x30mm cartridge was introduced as a competitor to the  5.7x28mm developed by FN.  While the 5.7x28mm has encountered some success in the US market in the FN Five seveN pistol and the P90 and PS90 bullpup carbines, the 4.6x30mm has not had the same fortune with the HK MP7.

The ballistics are interesting in the 4.6x30mm, but not terribly exciting when compared to the 5.7x28mm.  Fiochi advertises their 4.6x30mm 40 grain FMJ and SP ammunition at 1900 fps.  Meanwhile the FN SS197SR, with the Hornady V-Max 40 grain bullet, is listed at 2034 fps.

I just don’t see a revolver chambered in 4.6x30mm as being a gun that will generate much interest…especially as a revolver.  The only thing I can imagine is a revolver set up for varmint/small game hunting, but I would probably rather a .17 HMR chambering for that anyway.  Frankly, if we were a little closer to April 1, I would have figured Bane was setting us up for a little joke.

Regardless, tune in to Michael Bane’s Downrange Radio podcast Wednesday for all the information.  Bane has promised to give us all a little more information then.


The promised 4.6×30 revolver never appeared. Chances are this was another pie-in-the sky move by Taurus to generate interest in distributors. Taurus has done this more than once.

Many times a company will develop prototype firearms to bring to the SHOT Show or NASGW Expo to gauge interest from the distributors. These guns will most often be kept behind closed doors, and not be shown to the media or public. My guess is this revolver was one of those projects. Ultimately, it never made it into production or onto dealer shelves.