The MP5 has been the preeminent submachine gun for tactical applications for over thirty years. It has been unrivaled in terms of tactical functionality and usefulness and has been a favorite of tactical teams all over the world. In more recent times Sig Sauer introduced its MPX. Outwardly it appears somewhat similar to the MP5, but make no mistake about it, it’s a completely different weapon. So, what are the differences between the MP5 and MPX? In a MP5 vs MPX matchup, does newer mean better?

I had the opportunity to evaluate these weapon systems head-to-head. The MP5 I used was an older model that still functions well. The MPX was brand new. I used iron sights during my evaluation. Both weapons were chambered in 9mm. I used Winchester Ranger 9mm ammunition for range comparisons.

Photos by John Coward

MP5 and MPX

Functionality

The MPX fire controls mimic the AR15 weapons platform. The safety, magazine release, bolt hold-open device, and charging handle are all in the same place. The bolt is pretty stiff and takes some muscle to charge. As with many firearms, there is probably a break-in period where parts loosen up a bit. The weapon doesn’t come with an ambidextrous charging handle. This is a pet peeve of mine since I am left-handed, but like an AR, it can easily be swapped out.

The MP5 has a large selector switch, two magazine releases, and a charging handle on the left side of the gun. The charging handle isn’t reciprocating so you are stuck with it where it is.

Since the MPX is set up the same way as the AR rifle series I give it an edge in terms of having the same manual of arms. That said, the MP5 is simple to operate with a little practice.

Both weapons I tested had retractable stocks. They were both easy to deploy. The MPX has what appears to be a sling mount below the stock which, at times, interfered with returning the stock to its original position.

These submachine guns measured about the same length with the stock retracted. According to my measurements, the MP5 (minus the weapons light) was about 18 inches, the MPX 20 inches.

Modularity and Variation—MPX vs MP5

The MPX had a full picatinny rail on top of the receiver and another one on the foregrip. The older generation MP5 I had did not have rails but newer models do. The MPX has a flash suppressor. The MP5 does not but has a threaded barrel capable of mounting a suppressor.

The MP5 line is long in calibers ranging from 9mm, .40 S&W, 10mm, and .45 ACP. HK also carries the suppressed MP5SD. Included is the lesser known MP5K, which features a shorter barrel and receiver over the original as well as a higher cyclical rate.  well as the MP5K

There are currently six variants of the MPX, including one with a built-in suppressor, the MPX XD. All models of MPX are chambered in 9mm.

Accuracy

The MP5 comes with fixed iron sights. I believe these sights are the best ever made, period. I carried an MP5 for many years in law enforcement special operations teams and preferred those sights over mounted optics. The MPX I used had a standard AR type BUIS that worked well. Both submachine guns demonstrated equal accuracy.

Comparison of targets from MP5 and MPX at 25 feet.

MP5 vs MPX: Overall Impression

I liked both submachine guns equally during this short test. The MP5 has a proven track record but the MPX will have its chance to shine too. Either weapon would be a successful tactical platform for team or individual use.

-NP

*Featured Image Courtesy of Lit Reactor

This feature first aired on August 23, 2016.

Want to read more reviews by Breach Bang Clear contributors? Check them out here.

For the latest on the most recent MPX developments, see the review on the MPX-K.