Sig Sauer MPX K 9mm PCB 4.5" Barrel 35 Round Capacity PMPX-4B-9-35
Description
The MPX K offers a closed bolt gas piston system that is ultra reliable and durable. The MPX K is modular allowing for multiple handguard and barrel lengths and is ready to go for suppressor use. It features the SIG PCB folding brace which allows the K to fold into an ultra-compact size and be operable in the folded position. The K features an updated M-LOK handguard and Timney Trigger. Includes 35rd polymer magazine.
| Brand | Sig Sauer |
| Category | Tactical Pistols |
| Model | MPX K |
| Caliber | 9mm Luger |
| Barrel Length Range | 4" to 4.99" |
| Gun Platform | AR-Style |
| Operating System | Gas Piston |
| Capacity | 35+1 |
| Stock Material | Synthetic |
| Action | Semi-Auto |
| OAL | 22.25" |
| Hand | Ambidextrous |
| Sights | None |
| Barrel Finish | Black Nitride |
| Barrel Material | Carbon Steel |
| Twist | 1:10" |
| Receiver Description | Picatinny Rail |
| Grips | Black Polymer |
| Handguards | M-LOK |
| Height | 8" |
| Receiver Material | Aluminum |
| Safety | Lever |
| Thread Pattern | 13.5x1 |
| Width | 2.40" |
| Stock Description | Folding Pivoting Contour Brace |
| Barrel Description | Threaded |
| Barrel Length | 4.50" |
| Max Capacity | 35 |
| Receiver Finish | Black Hardcoat Anodize |
| Trigger | Timney Single Stage |
| Weight | 5 lbs |
| Stock Finish | Black |
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Likes:
It was hard to find one of these, so thanks for keeping the good stuff in stock. First time at the range the MPX K shoots 1.5" at 60 ft with a red dot, and a ragged single hole at 27 ft, which was impressive and exceeded expectations. I ran 6 different kinds of ammo, and while it did best with a couple none were bad. I love how compact it is. It's surprisingly solid and sturdy, with a very good trigger out of the box. Had no FTE or FTF with 115, 124, or 147 gr ammo. Brace swivel works very well. Magazine loads and operates well. Barrel doesn't really get that hot.
Opportunities:
The grip is too slanted for such a short LOP. The bolt catch can be a bit challenging, b/c you have to really press it and pull the charging handle 100% of the way back to catch it. Bolt release on the right side, and the mag release on the left are both really stiff. So much so that, as an avid BAD lever user, I started using the release on the left. Double sided charging handle is much better than I expected. Hand guard has a little bit of forward/back play to it, but I like the innovative mounting system it has. It's very disappointing that SIG uses an odd barrel thread, with only aftermarket replacements as options.
I like and appreciate that GunPrime shipped the firearm very quickly, and provided tracking info. A 0.5" riser was really helpful so that the red dot doesn't hide above the option when quick aiming.
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