Based off the iconic Mossberg 500 platform, the Mossberg 500 Chainsaw is a pistol-grip pump-action shotgun without a stock that features a wrap-around chainsaw-style hand grip incorporated into the forend.

With the support hand above the barrel, counter force levels the muzzle as it kicks simultaneously cycling the action.

It takes some time getting the hang of firing the Mossberg 500 Chainsaw as you’re essentially just firing from the hip and you’ll probably miss the first few times.

However the chainsaw-style grip does a really good job at keeping muzzle flip under control.

In addition to the chainsaw-style grip, there are three Picatinny rails on the forend for mounting accessories such as lights or lasers.

The 500 Chainsaw has a stand-off barrel that is intended for breaching doors, the rigid teeth on the muzzle also gives this shotgun a very aggressive look.

The Loading and operating the 500 Chainsaw is the same as any Mossberg 500 or 590, even the position of the safety selector (above the pistol grip) is the same as other Mossberg models.

Pushing the selector into the forward position will expose a red dot indicating the shotgun is ready to be fired.

What really makes this 500 unique to other pistol grip shotguns is that it has a “chainsaw” handle attached to the pump as an aid for “accuracy” when shooting from the hip, however this is a conundrum because after about ten feet nothing is accurate when shooting from the hip. Sure it was fun, but very impractical.


I would recommend the Mossberg 500 Chainsaw strictly for personal defense (although not the best shotgun for that task) and Law Enforcement SWAT entry teams; moreover, this configuration is impractical for use with trap shooting, hunting, and even target shooting.

Overall the Mossberg 500 Chainsaw pump shotgun is a very aggressive and intimidating looking platform with better usage in zombie video games and Hollywood movies than in real life applications.


Type: Pump Action Shotgun

Gauge: 12 gauge

Chamber: 3″

Capacity: 5+1 (2 3/4-in. Shells)

Stock: Pistol grip only

Sight: Post (front), white dot

Material/Finish: Steel/matte black

Trigger: 5lb., 3oz

Barrel Length: 18.5″, cylinder bore

Weight: 5.75 pounds

Overall Length: 31″

Chokes: Cylinder

In the US, the Mossberg 500 ranks as one of the most popular shotguns with over 11 million sold.

Keenly priced, it is offered there in all sorts of sporting, military and police variants; there is even a 500-based line-throwing gun (not to mention that the veritable industry offering retrofit bits, including a conversion kit to turn the 12-bore into a .50-cal muzzleloader).

This hugely successful pump gun is seen in 12-bore, 20-bore and .410 guises, and with five- and eight-shot extended magazine, available in the 12.

Hushpower in the UK use the 500 as the basis for some of their sound-moderated guns (and their little .410 is one of the best guns of this type on offer, in my opinion).

Can’t resist a bit of history, especially as nearly all repeaters begin, conceptually, as pump guns: most semi-automatics are just designs that have been adapted/evolved to use recoil energy or gas to operate a pump-style action.

Pump-action shotguns have been around for 140 years. The first successful gun, and the one which established the magazine-below-the-barrel and reciprocating fore-end configuration that has since become so familiar, was the six-shot Spencer, patented in 1882.

It was the work of a collaboration between Christopher Spencer, of Spencer rifle fame, and the no-less-gifted inventor, Sylvester Roper, who had previously developed a revolving shotgun.

John Moses Browning, who invented the excellent 1887 Winchester lever-action shotgun came up with a number of improved pump-action designs during the middle and late 1880s.

He sold these to Winchester periodically, but none was actually manufactured until the appearance of the Winchester Model 1893.




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