Description

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Rifle-Caliber Punch from a Small Package

The MCX Rattler PSB is a semi-auto pistol variant of Sig Sauer’s select-fire MCX Rattler SBR fitted with a Sig Brace. These pistol features make the PSB easier for the civilian to own without a long wait for NFA paperwork. Otherwise, the PSB offers all the strengths of the original MCX Rattler, including rifle-caliber .300 AAC Blackout punch and the ever-familiar AR-15 operating system in a slim, ULTRA-COMPACT package that’s easy to deploy quickly.

Built around Sig’s proven gas piston action, the MCX Rattler PSB doesn’t need a buffer tube, which contributes to its diminutive size. And with its 5.5" PDW barrel, the PSB is incredibly easy to squirrel away in a tight place - a backpack, briefcase, computer bag – until you need it. The three-position telescoping brace deploys in an instant, so you get your PSB into action FAST.

100-027-195WB
Mfr Part: PMCX300B5BTA
ITEM DETAILS
Action Type: Gas Operated
Barrel Length: 5.5"
Capacity: 30+1-Round
Cartridge: 300 AAC Blackout
Finish: Black
Front Sight: None
Length: 19.3"
Magazine Included: 1 x 30-Round
Magazine Type: Removable
Muzzle: Flash Hider
Rear Sight: None
Stock Material: Brace
Weight: 5.1 lbs

Other features:
- 19.3" collapsed OAL
- Uninterrupted full-length Picatinny top rail
- Ambidextrous controls
- Free-floating, hammer-forged carbon steel barrel with 1-5" rifling
- 3-position telescoping Sig brace
- M-LOK slots on handguard
- Multiple sling-mounting options
- Uses standard USGI-pattern AR-15 magazines

The full-size charging handle, safety selector, and mag release are all ambidextrous, so it’s easy to operate them in fast moving, high-pressure situations. The specially contoured and textured pistol grip gives your shooting hand excellent control. And the Sig Enhanced Trigger proves that a compact firearm doesn’t have to be a forced compromise with a poor trigger.

Finally, the Sig Sauer MCX Rattler PSB’s adjustable gas block enables you to shoot both supersonic and - for use with a sound suppressor - subsonic ammo from it.

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Comments (5)

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Wow. I don't get it. You can build a real SBR, stamp included for so much less. Something waaay better looking than this, I mean let's face it, you're not getting $2400 worth of materials or performance here, especially from a 5" barrel, so it's obviously about looks.

Can we just call it what it is? An expensive and grossly profitable manufatures option to skirt the NFA tax with a so called "arm brace" (that no one uses as intended or described) to quickly get the cool factor without waiting. Notice I said waiting and not paying because Sig is TAXING THAT ASS way more than any $200 stamp. Some may justify it as "cool factor" but what's cool about spending more for an imitation, a so called "loophole" SBR... LOL. Again, I just don't get it.

Nah, I'd rather wait my 6 months and build the real deal for about a $1000 less but I guess I'm old school. Hell, for the same $2400 you could build an authentic SBR, suppress it and that's including the two stamps to make it all legit.

1 vote
28 votes

I'll be the 1 to 28 thumbs up vote for that comment. I have a few MCX models and generally like them but have seen the prices skyrocket w/ little perceived value over the earlier generations. Generally the shorter the barrel the higher the price. I wondered where they came up with the "rattler" designation and wondered if it's because of the upper and lower eventually developing a rattle as the round count increases. I know there are many loyal Sig people and I am a fan of their products but the price increases are unreal - not to mention they've stripped just about every possible accessory they can as of Jan 2017 - including flip-up sights, slings, QD attachments, etc.

I won't even get into the promised caliber options that never materialize and how many Sig rifles have carried that claim and are soon discontinued. The MCX is a decent platform but hardly worth the money as you can get a superior setup for much less.

0 votes
0 votes

Should have made with a 9 inch barrel

1 vote
0 votes

Ad must have changed. I also got 10% off the price of the Rattler. Net was something like $2170 plus the gift card of $150.

0 votes
0 votes

Just bought one!

1 vote
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