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SIG Sauer ProForce P320 M18 MHS Airsoft GBB Pistol (Model: Green Gas)

ID: 91229 (AIR-PF-M18GG)
SIG SAUER798681626298AIR-PF-M18GG91229
5.0 stars, based on 3 reviews
SIG Sauer ProForce P320 M18 MHS Airsoft GBB Pistol (Model: Green Gas)
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  • Metal slide with fully licensed SIG SAUER laser etched trademarks
  • Optic ready slide with removable reflex sight plate
  • Compatible with both CO2 and green gas magazines
  • Field strippable with similar weight and balance to the real M18 handgun
  • 1:1 replica of the new compact version of the US Army Modular Handgun System
Designed for professional training, this high-end SIG AIR ProForce airsoft pistol is a replica of the U.S. Army issued P320-M18 9mm pistol in look, balance, and handling characteristics and engineered to SIG standards for precision, accuracy, and reliability. The M18 is the compact variant of the MHS chassis.

Since the early mid 1800s SIG Sauer has been widely regarded as a purveyor of some of the best small arms on the planet. Known for their fine combat, competition and personal defense pistols and rifles, SIG Sauer holds law enforcement and military contracts the world over and is the personal choice of thousands of firearm owners. People who trust their lives to a firearm put their trust in SIG Sauer.

The ProForce M18 features a polymer frame and metal slide with full blow-back action. An adjustable hop-up feature creates spin on the BBs for additional stabilization in flight, resulting in increased distance and accuracy. A 20mm M1913 Picatinny accessory rail allows for quick and easy accessory mounting, comes with an optic cut for the addition of the soon-to-be-released SIG AIR Red Dot Optic, and is available in 12g CO2 cartridge or green gas power options.

Manufacturer: Sig Sauer / OEM: VFC (UPC: 798681626298)

FPS Range: 300-320

Color: Tan


Length: 195mm (7.7in)
Height: 140mm (5.5in)
Weight (w/ Magazine): 0.68kg (1.5lbs)
Barrel Length: 90mm (3.5in)
Magazine: 21+1 rounds
Gas Type: Green Gas
Firing Mode: Semi Automatic, Safety
System: Gas Blowback
Hopup: Yes, Adjustable
Package Includes: Gun, Magazine, and Manual


SIG SAUER, Inc. is a leading provider and manufacturer of firearms, electro-optics, ammunition, airguns, suppressors, and training. For over 150 years SIG SAUER, Inc. has evolved, and thrived, by blending American ingenuity, German engineering, and Swiss precision. Today, SIG SAUER is synonymous with industry-leading quality and innovation which has made it the brand of choice amongst the U.S. Military, the global defense community, law enforcement, competitive shooters, hunters, and responsible citizens. Additionally, SIG SAUER is the premier provider of elite firearms instruction and tactical training at the SIG SAUER Academy. Headquartered in Newington, New Hampshire, SIG SAUER has almost 2,000 employees across eight locations in the U.S. and around the world.


SIG SAUER air pistols, air rifles and accessories are engineered to elevate airguns to a new standard of performance. Perfected for practice with every advantage built in, these airguns are the economic, authentic answer to training more often, more effectively.

About ProForce

The SIG AIR ProForce line of airsoft guns is designed for professionals who train frequently and want the option of training safely in realistic force-on-force scenarios. SIG SAUER is a huge proponent of training, and we will continue to offer our customers numerous new product options to facilitate the safe practice of gun handling and target shooting in various environments.

3 Customer Reviews

(Write a review)

by Henry C. on 08/16/2020
"This is a very good replica. I have the M18 firearm. The weight and overall dimensions and most of the markings are the same. The only obvious differences are that the airsoft sights are smaller and fixed and aren’t night sights. The mount plate also has a different shape. The polymer part of the airsoft is also a bit darker colored. As far as markings go, the only difference is that the firearm says “P320” as well as “M18.” The airsoft gun shoots great. I like how I can use the extended green gas magazine from my M17.
by Jace Y. on 08/16/2020
"After seeing Sig Sauer had released their Proforce P320-M18, I immediately traded in my P320-M17 to pre-order this. Only difference is a shorter slide and it comes with 17rd magazine, but I think the strenuously long wait for it's arrival was worth it.
Just like the P320-M17, this pistol is a great shot. It fits the carry theme quite nicely. It's ergonomic and easy to manipulate. Though I was really hoping that this pistol would fix the liability issues with the P320-M17 and it's 21rd magazine.
The new P320-M18 17rd magazines are visually pleasing, but still have fragile plastic feed lips with no way to fix them, wobbly base plates, and stiff feeding springs that easily slip out of your grip. The magazines are the only downsides of both the P320-M17, and the P320-M18. I'm hoping that Sig will listen to the many warning of fragile magazines, and will work on the quality control to make better awesome airsoft replicas. I believe Proforce has lots of potential!
Looking forward to the red dot coming out soon. :)
by R. H. on 08/14/2020
"I just received my Proforce M18 and it's so far, so good. For those who may be wondering, I also have the M17, and everything is interchangable (including green gas & Co2 mags) with the exception of the barrel and recoil assembly for obvious reasons. The diameter of the recoil rod is also noticably larger when view the muzzle end of the pistol. It did initially have an issue locking back on the last round, but after breaking it in with a few shots and working the slide, it worked fine. The thumb safety is also very stiff, but like the M17, I'm sure it will be smoother after breaking in. The action is also very crisp and smooth. The trigger is decent and hitting the wall is short, but there is some travel before the hammer actually engages. The trigger reset is not good because it can hardly be felt or heard. If you know any of the Elite Force/Umarex Glocks, then you know how positive the reset is. I wish it felt the same for this.

I cannot comment on FPS as I do not have a chronograph. However, the accuracy is good based on my ~ 10-15 ft range setup. I can make 1-2in groups.

Steel components: all of the recoil assembly with the exception of the aluminum wheel that engages the hopup, mock extractor, mock round indicator, slide catch, all springs and screws, hammer assembly and sear.

Aluminum components: magazine, trigger, takedown lever, thumb safety, magazine release, outer barrel, front and rear sights, sight plate, hopup wheel, chamber assembly, blowback assembly (with the exception of the plastic nozzle and slide plate), and the chassis inside the lower frame.

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