The P320 has excellent trigger. My highly shot PPQ classic has a lighter weight trigger but after the P320 gets broken in more, its gonna be a close call. That is to say one of the best 3 striker fire triggers in the industry. (PPQ, VP9, P320). Trigger break on the P320 is very crisp and predictable. The fact the P320 is a modular platform is a entirely different animal in flexibility that the other two don't do. The P320 is a game changer for sure. The P320 points like a 1911 exactly. 3 of my local LE Dept. have already switched to the P320.
Caliber X-change kits are about $290.00. All parts mix and max so there is no reason you can't build the optimum pistol in various calibers.
Here is a explanation I did on the Sig forum to clear up any confusion:
There have been a number of confusion on the Sig P320 and the names and sizes. I am going to try to give a basic overview.
First you need to know that any sizes mag capacity will fit in any size frame providing its long enough. This is very similar to the Glock and mini Glocks.
This means if you buy a P320 subcompact (the smallest of the line up) that comes with a 12+1 in 9mm, you can use any of the larger mags even though it will hang out of the bottom of the frame.
For example: You purchase a P320 subcompact or P320 compact for your daily carry gun you also use as a night stand gun when home. You may want to purchase a few additional full size P320 mags that hold 17 rounds of 9mm as a back up mag for your more smaller size P320 when you are not carrying it.
Sizes and names decoded:
The smallest of the P320 family is the "Subcompact": It is close to the size of a baby Glock like the G26. The P320SC has a thinner frame, shorter slide and rounded trigger guard. Much easier to shoot than a G26 and is a great concealment pistol that you can also shoot on the weekends and not feel like a pocket pistol. Flush fit magazines hold 12+1 of 9mm and rounds and 10+1 of 40s&w, 357Sig. 17 and 15 round magazines will also fit. Sight radius is 5.5". Barrel length is 3.6"
Next in size is the "Compact":It is about the size of a Glock 19. It has a longer slide and frame than the subcompact with a squared off trigger guard and accessory rails for a light if you wish. Great all purpose size for carry and LE.
Certainly will be the most popular size for new and experienced shooters since its larger frame is easier to fit most hands and mitigate recoil. Flush fit magazines hold 15+1 of 9mm and 13+1 of 40s&w, 357Sig. Sight radius is 5.8"
Barrel length is 3.9"
Next after would be the "Carry". This is a hybrid of the smaller compact slide mounted to the full size frame. This gives you the same barrel, slide and sight radius as the Compact but allowing you to flush fit the largest magazines in its larger frame. I understand that this model was requested by Law Enforcment as a duty gun. Flush fit magazines hold 17+1 of 9mm and 14+1 of 40s&w,357Sig. Sight radius is 5.8". Barrel length is 3.9".
Last and largest in size is the "Full-Size".
This is the largest of the P320 family. It is a full size duty gun for LE. It would make a great IDPA shooter and range gun.
Flush fit magazines hold 17+1 of 9mm and 14+1 of 40s&w,357Sig. Sight radius is 6.6". Barrel length is 4.7".
My thought and input on these sizes for new buyers.
If you want the best size for carry and home use , the clear winner is the Compact. Its grip size will fit most all shooters and ability. It gives you 15+1 of 9mm and the ability to use the larger 17+1 full size magazine as a backup for home and car.
The "Subcompact" is easily the smallest to carry and conceal. It has a narrower and shorter frame with rounded trigger guard than the rest of the P320 family. It feels more like a single stack pistol than a double stack which it is. The frame is shorter so if you wear mens size L/XL gloves, your pinky will fall below the grip. The slide is also the shortest for ease of carry but not so short it puts it in a pocket pistol or micro gun category. It could easily be your one and only gun IF you can shoot with your pinky not on the frame. Recoil is not a factor even with hot +p ammo. I found it much easier to shoot than a G26/27 and could be a LE Detectives gun.
The "Carry" size is strange in its application. In 9mm it will give you 2 extra rounds over the Compact but in 40/357sig it only gives you 1 extra round over the Compact. The 9mm may be worth it to buy it over the Compact IF you need a flush fitting magazine but in 40/357sig the one extra round isn't worth the larger size frame. Consider than any of the of its smaller family members can use the larger capacity magazines, the Carry doesn't make a good argument for the non-LE buyer. I believe even most LE will choose the Compact or Full over the Carry.
The Full size is the range gun. Its longer barrel will get the highest velocities and mitigate recoild better than the rest of the P320 family. Its also a great choice if you have extremely large hands and are looking for a house gun or firearm you will open carry. The IDPA shooters will love this gun. It certainly has LE written all over it since it is very similar the the G17 in size.
With the various X-change kits, the mix and max possibilities are almost endless. It would be impossible not to find a size and caliber you won't love if you are a striker fire fan. Factor in the great clean breaking trigger and short reset and you will always have your ideal gun however you choose to configure it.
Caliber X-change kits are about $290.00. All parts mix and max so there is no reason you can't build the optimum pistol in various calibers.
Here is a explanation I did on the Sig forum to clear up any confusion:
There have been a number of confusion on the Sig P320 and the names and sizes. I am going to try to give a basic overview.
First you need to know that any sizes mag capacity will fit in any size frame providing its long enough. This is very similar to the Glock and mini Glocks.
This means if you buy a P320 subcompact (the smallest of the line up) that comes with a 12+1 in 9mm, you can use any of the larger mags even though it will hang out of the bottom of the frame.
For example: You purchase a P320 subcompact or P320 compact for your daily carry gun you also use as a night stand gun when home. You may want to purchase a few additional full size P320 mags that hold 17 rounds of 9mm as a back up mag for your more smaller size P320 when you are not carrying it.
Sizes and names decoded:
The smallest of the P320 family is the "Subcompact": It is close to the size of a baby Glock like the G26. The P320SC has a thinner frame, shorter slide and rounded trigger guard. Much easier to shoot than a G26 and is a great concealment pistol that you can also shoot on the weekends and not feel like a pocket pistol. Flush fit magazines hold 12+1 of 9mm and rounds and 10+1 of 40s&w, 357Sig. 17 and 15 round magazines will also fit. Sight radius is 5.5". Barrel length is 3.6"
Next in size is the "Compact":It is about the size of a Glock 19. It has a longer slide and frame than the subcompact with a squared off trigger guard and accessory rails for a light if you wish. Great all purpose size for carry and LE.
Certainly will be the most popular size for new and experienced shooters since its larger frame is easier to fit most hands and mitigate recoil. Flush fit magazines hold 15+1 of 9mm and 13+1 of 40s&w, 357Sig. Sight radius is 5.8"
Barrel length is 3.9"
Next after would be the "Carry". This is a hybrid of the smaller compact slide mounted to the full size frame. This gives you the same barrel, slide and sight radius as the Compact but allowing you to flush fit the largest magazines in its larger frame. I understand that this model was requested by Law Enforcment as a duty gun. Flush fit magazines hold 17+1 of 9mm and 14+1 of 40s&w,357Sig. Sight radius is 5.8". Barrel length is 3.9".
Last and largest in size is the "Full-Size".
This is the largest of the P320 family. It is a full size duty gun for LE. It would make a great IDPA shooter and range gun.
Flush fit magazines hold 17+1 of 9mm and 14+1 of 40s&w,357Sig. Sight radius is 6.6". Barrel length is 4.7".
My thought and input on these sizes for new buyers.
If you want the best size for carry and home use , the clear winner is the Compact. Its grip size will fit most all shooters and ability. It gives you 15+1 of 9mm and the ability to use the larger 17+1 full size magazine as a backup for home and car.
The "Subcompact" is easily the smallest to carry and conceal. It has a narrower and shorter frame with rounded trigger guard than the rest of the P320 family. It feels more like a single stack pistol than a double stack which it is. The frame is shorter so if you wear mens size L/XL gloves, your pinky will fall below the grip. The slide is also the shortest for ease of carry but not so short it puts it in a pocket pistol or micro gun category. It could easily be your one and only gun IF you can shoot with your pinky not on the frame. Recoil is not a factor even with hot +p ammo. I found it much easier to shoot than a G26/27 and could be a LE Detectives gun.
The "Carry" size is strange in its application. In 9mm it will give you 2 extra rounds over the Compact but in 40/357sig it only gives you 1 extra round over the Compact. The 9mm may be worth it to buy it over the Compact IF you need a flush fitting magazine but in 40/357sig the one extra round isn't worth the larger size frame. Consider than any of the of its smaller family members can use the larger capacity magazines, the Carry doesn't make a good argument for the non-LE buyer. I believe even most LE will choose the Compact or Full over the Carry.
The Full size is the range gun. Its longer barrel will get the highest velocities and mitigate recoild better than the rest of the P320 family. Its also a great choice if you have extremely large hands and are looking for a house gun or firearm you will open carry. The IDPA shooters will love this gun. It certainly has LE written all over it since it is very similar the the G17 in size.
With the various X-change kits, the mix and max possibilities are almost endless. It would be impossible not to find a size and caliber you won't love if you are a striker fire fan. Factor in the great clean breaking trigger and short reset and you will always have your ideal gun however you choose to configure it.
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Another advantage for LE use.