Current order processing time frame: 6 business days
Due to frequent problems with USPS First Class Mail, this shipping option is currently unavailable.

Welcome to Osage County Guns

Sig Sauer P320 Full Size .45 ACP Night Sights

Ask a question (1)

Availability: Out of stock

Quick Overview

Sig Sauer P320 Full Size, .45 ACP, 4.7" BBL, 10rd, Night Sights


Note that Sig Sauer recently made an inline design change to the grip shells and slide catch levers. Watch our video below for additional information. We cannot guarantee that you will receive one or the other due to Sig using the same part numbers for the old and new style grip shells, Caliber X-Change Kits, and P250 / P320 firearms.

. Sig P320 Medium Grip Shell Circumference

Unlike any other pistol in its class, the P320 features a unique 5-point safety system, standard on all models:

- Striker Safety
- Disconnect Safety
- 3-Point Take Down Safety System
- Takedown is prohibited without removal of magazine
- System prohibits takedown without slide locked to the rear
- Rotation of takedown lever allows disassembly without tools or trigger manipulation.

The unique modular design of the P320 offers the user the ultimate in flexibility to change calibers, sizes, and fit. Small, medium, and large complete polymer grip modules ensure comfortable and optimal fit for the widest range of hand sizes.

Note: The caliber exchange kits are currently not compatible with the P320 chambered in .45 ACP. The additional parts required to make the caliber exchange kit work with this pistol should be available by Sig Sauer in the near future, but we have no ETA on this.

Specifications are subject to change.

Additional Information

SKU 320F-45-BSS
UPC Code 798681513468
Caliber .45 ACP
Manufacturer Sig Sauer
Overall Length 8.0 in
Overall Height 5.5 in
Overall Width 1.4 in
Sights (detailed) SIGLITE Night Sights
Grips Interchangeable Polymer
Frame Finish Black Polymer
Slide Finish NitronĀ®
Barrel Length (in) 4.7 in
Mag Capacity / Rounds 10rd
Number of Mags 2
Accessory Rail Yes
FFL Requirements All firearms must be shipped to a Federal Firearms License (FFL) holder. We cannot and will not ship firearms to anyone but a FFL. We must receive the receiving dealer's FFL by fax (314-558-8429) or email ([email protected]).
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at

Product Questions

Product Questions

If I purchase this pistol 320F-45-BSS, would it be possible for you to send me one with small grip module? I believe they come with medium grip module, but it's too large for me.

Referenced product: 320F-45-BSS

The small grip module would need to be purchased separately. We apologize that we're unable to swap them.

Rate the answer?

You may also be interested in the following product(s)

Sig Sauer .45 ACP New Brass (100 Count)

Sig Sauer .45 ACP New Brass (100 Count)


Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Customer Reviews

P320 45 Review by Alaskan
For 4 months been trying to track one down still no luck. How can this be? Yet I can find a glockenspiel on the corner of every street. Help needed to get one (Posted on 10/13/2016)
Can't wait to add more sizes, compact and carry Review by Colorado Cowboy
After seeing reviews of the 9MM I started looking for a .45. After buying one of the first available, a trip to the range could not come fast enough. What a surprise. The perceived recoil is less that on my 220, and my hand fits the medium frame better.
I did not get the night sights, which is fine, I am a combat instinctive shooter not depending on sights as much as training to shoot on an instinctive level, two eyes open point of aim.
Only thing I would change, the acc mounting lugs. They get in the way, and I would never mount a light to advertise my location.
How about it Sig, a frame w/o the lugs ?
Overall shooting the 320 is more comfortable than my 226 EE, in 9MM, and that's saying a lot. (Posted on 8/10/2015)

Write Your Own Review

You're reviewing: Sig Sauer P320 Full Size .45 ACP Night Sights

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars