Sig Sauer P365 Part 6

Sig Sauer P365 Part 6

The bottom line

By Dennis Adler

You might wonder what that channel is for that runs along the frame on both sides beginning just above of the trigger. This is a proprietary accessory rail, like HK has for the USP. In Sig’s case, a traditional Picatinny accessory rail would be too wide for the Micro-Compact’s frame. Sig has already developed laser sights for this gun and will likely have other P365 specific mounting accessories down the road. The CO2 model will accept all of those as well. For now, you just have to settle for the smallest blowback action air pistol with a self-contained CO2 BB magazine that has ever been made.

With 1:1 gun tests there is the overwhelming factor of gun powder vs. CO2 as the propellant, and that’s one thing a blowback action CO2 pistol can never duplicate, the actual felt recoil and sound of a handgun firing. Training with air is absolutely good for fundamental skills that lead up to the moment you pull the trigger. After that point, the two guns go their separate ways. The importance of a good training gun, or understudy as they are often referred to, is that everything up to the moment you pull the trigger is 1:1. It has to feel the same as pulling the trigger on the centerfire model, and obviously the trigger is one very important part of that equation. Only a handful of CO2 models have a trigger pull as close to actual as possible. The question here is, is the Sig Sauer P365 CO2 model one of them?

Most quality CO2 models have a trigger that is very similar to its centerfire counterpart. The P365 has a trigger that is exactly like its centerfire counterpart, making this a perfect training gun for those considering the purchase of the rather pricey 9mm model. You can get to know the $599 gun for only $79.99.

Reviewing trigger pull comparisons

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Testing trigger pull during this series of articles revealed an average trigger pull on the air pistol of 5 pounds, 6 ounces, with only 0.3125 inches of total take up to a crisp break. The trigger moves back 0.25 inches with almost zero resistance, and then there is a firm 0.125 inches until the trigger pull breaks the shot. There is no creeping with the CO2 model’s trigger, just a steady increase in resistance (stacking) common with a double action (or DAO) trigger. The pistol exhibits no over travel and the trigger has a quick reset. This compares favorably with the centerfire pistol’s 6 pound average trigger pull, which also moves back 0.25 inches with almost zero resistance before effort increases as you pull through another 0.25 inches to releases the striker. The important part of this comparison is how the trigger feels. There is the same short take up and same resistance until the shot breaks. It is heavy, 5 pounds, 6 ounces all in 0.125 inches, but the pull through remains consistent from shot to shot. Now, with the 9mm model the take up is slightly more pronounced, but the pull though and break are almost identical, enough so that you can learn the P365 trigger from practicing with the CO2 model.

Exact has only one definition. The size, grip design, sights, and controls are exactly the same as the centerfire models. The gun feels and handles the same right up until the moment after you pull the trigger. You can learn a lot about the P365 by that point with the CO2 model.

Downrange in .177 and 9mm   

In daylight, sighting with either gun is the same with the Sig 3 dot XRAY3 Day/Night Sights appearing bright with the green front dot and the CO2 model with the white dot rear and green front dot. The comparison test is a regulation Law Enforcement Targets cardboard B-27 silhouette target and the shooting distance starts at 7 yards (21 feet). Both guns will be loaded with 11 rounds (10+1 in the 9mm) and 11 Umarex Precision steel BBs in the P365 CO2 model. The drill is draw and fire two rounds. Change position right of center, draw and fire two rounds. Move left of center and repeat. Step back to 15 yards (45 feet), draw and shoot to empty. This will be more telling with the CO2 model, but it should still be hitting center mass at that distance with a fresh CO2 cartridge.

What I found after two weeks with the test guns, is that except for the slide locking back short, the barrel not tilting up, both visual differences, and not being able to fieldstrip the CO2 model, there is nothing you cannot learn about handling the 9mm pistol from the CO2 model. As a 9mm the P365 sets a new standard for size and capacity. As an equal, the CO2 model can make the same claims in its category of air pistol. It’s a little gun with big potential.

I used the same Galco holster for both guns and drawing and firing technique, Weaver stance, two-handed hold, timed fire at 1-second intervals. The 9mm at 21 feet and 45 feet did what a good personal defense gun should do; it put all 11 rounds into the center mass of the target from all angles and both distances. The 11-shot spread was all inside the 10 and X except for one flyer that hit in the 9-ring at 4 o’clock from 45 feet. All hits counted as 5 points each. Ironically, I pulled one of the shots from the CO2 Sig and hit in almost the exact same spot from 45 feet. What I did discover was that the P365 shooting .177 caliber steel BBs at 45 feet was still delivering pretty tight groups. I can’t say at what velocity they were hitting, but there was a solid slap on the cardboard target for every one of the 11 rounds fired.

Equality of design in 9mm and 4.5mm (if you want to get metric about it), the centerfire P365 can put 124 gr. hard ball ammo into tight groups at 21 and 45 feet (as shown) and the CO2 model can do the same at equal distances. Out of 11 shots with steel BBs, all 11 were 5-point hits on the B-27 target. My POA at 21 feet was the 9 ring. I had two that went low at 45 feet before I corrected POA to dead center on the 7-ring, and then the remaining rounds struck within an inch of the 21 foot shots. Total spread for eight of 11 rounds was 1.25 inches. Total 11-round spread was 4.75 inches including five rounds from 45 feet. Shooting the 9mm pistol, total spread for 11 rounds was 3.75 inches combining 21 and 45 foot ranges. The P365 CO2 model gets passing grades for a training understudy in the field.

Sig Sauer’s P365 CO2 model gets a solid pass in this test as a training gun. As a .177 caliber semi-auto BB gun that can hit accurately at 21 feet, 30 feet and 45 feet, it sets a standard that no other air pistol this small can match. The competition just got tougher.

The Airgun Experience will return on July 22 with a series that is sure to bring back memories of your first .22 rifle, the Ruger 10/22. If you didn’t have one, you missed out on one of the great American rights of passage, but it’s not too late!

A word about safety

Blowback action airguns provide the look, feel and operation of their cartridge-firing counterparts and this is one reason why they have become so popular. Airguns in general all look like guns, blowback action models more so, and it is important to remember that the vast majority of people can’t tell an airgun from a cartridge gun. Never brandish an airgun in public. Always, and I can never stress this enough, always treat an airgun as you would a cartridge gun. The same manual of operation and safety should always apply.

10 thoughts on “Sig Sauer P365 Part 6”

  1. Good performance at the 45 foot range. Did you pick up a tail wind? Cements its’ place as a training pistol. Wonder if Sig will offer the extended XL version?

  2. Whats not to like!! I suppose the question arises whether the mag will have gas leaks like the KWC mags for the 1911. My M17 leaks when the gas cylinder is first put in but inserting the mag in the pistol shuts it down and it seems to have disappeared when you drop the mag.

    • Well I hope you enjoyed it. Lots of great guns in that book. Interesting, that today the Colt Peacemakers, Schofields, Remington Model 1875 revolvers, and Winchester lever action rifle, are all made as CO2 models. Not so, when I wrote that book.


      • Dennis,

        I most certainly am enjoying it. I have just finished “skimming” through it and have already added much to my stock of interesting but useless snippets of information. 😉

        The truth is I have a very strong attraction to the early Spencer, Sharps and Henry rifles and would really like to spend some time with each.

        Although I am seriously obsessed with airguns, I am not a big fan of the replicas. Now if they were to come out with a big bore PCP that resembled a Sharps, I might be forced to change my mind on that, at least once. 😉

  3. Just got my 365 CO2 and good first impressions. Fits well in its tiny fobus holster and has a real bang for its buck!. No gas leaks so far but I wonder if it feeds better with 11BBs rather than the advertised 12.
    On the CPW front the centrefire will give a whole lot of firepower in a very small and light space.

  4. 2 weeks down the line and not so good. Both mags are not retaining gas and even before this the pistol was only firing sporadically. My supplier says having similar problems with others of the first batch. Indeed one purchaser measured the BBs supplied with the gun and said they were slightly smaller than standard Umarex with the suggestion that this was what led to the feeding difficulties experienced.
    Currently my feelings are torn between an exchange to see if it is this gun or to do what another reviewer has done is purchase a Glock in replacement.

    • Derek:

      I never used the BBs that were supplied with the gun, just Umarex BBs. I had no problems with my test sample, but you know when anything new comes out there is always the chance that a few bugs have to be worked out. Might be the case here but not typical for Sig Sauer. I’d go for a replacement and give it another chance.

    • Derek:

      Good to hear that. It is a really nice air pistol. You seem to have more issues than most. Do you shoot your airguns a lot? I have thought about picking a gun and doing a series of articles on “Shooting a CO2 pistol to fail.” Not sure how long that would take, depending upon the pistol, but hard use is a factor. Your problems gave me the idea. Any one gun you would suggest for such a project?


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