Can I convert my 9mm SIG to .357 SIG or .40SW.

Centerfire Kits (9mm,.357 & .40) are intended for use on .22 Classic Framed Pistols. SIG SAUER does not guarantee or advocate the use of .40/.357 kits on standard centerfire 9mm frames.

Should I lubricate my pistol?

YES! All firearms require lubrication. Please follow your owner’s manual for instructions on proper lubrication. SIG SAUER recommends that you use lubricants specifically designed for firearms applications.

What kind of ammo can I shoot from my SIG SAUER pistol?
SIG SAUER recommends the use of only newly manufactured ammunition meeting SAAMI (www.saami.org) and/ or NATO specifications.

Can my pistol be converted to DAK?

If your pistol was made before 2005 it may not be able to be converted. Call our customer service group WITH THE SERIAL NUMBER OF THE GUN and we’ll confirm if the DAK conversion is available for your pistol.

How often should I service my pistol?

We recommend a service interval of once per year or every 5,000 rounds which ever comes first. This keeps your pistol in top operational readiness and is the same standard we recommend to all our law enforcement customers. Our custom shop offers a variety of service plans for both new and pre-owned pistols. Talk with one of our customer service group reps. today to help decide which service plan works best for you.

What is SAAMI and SAAMI-compliant ammunition?

SAAMI = Sporting Arms and Ammunitions Manufacturers Institute. For information on their regulations or to see if your ammunition selection is SAAMI compliant,

Can I use +P or +P+?

+P Ammo manufactured to SAAMI/CIP/NATO specs is fine to use as a defensive round or for occasional range use. Continual use of this round will make it necessary for more frequent service on the pistol. We do NOT recommend the use of any +P+ round. This may void your warranty.

Can I use reloaded or hand-loaded ammo?

No. The use of any ammunition that is not an American factory loaded, SAAMI approved round could be dangerous and will void your warranty.

My 938/238 hammer will drop from the half-cocked position with the safety on. Is this a problem?
The pistol is not designed to be operated in this condition. If you intend to carry the firearm, you should either have the hammer fully cocked with the safety on, or you shouldn’t load a round into the chamber.

Can I add after-market parts to my gun?

Adding after-market parts or accessories to your pistol could be unsafe, result in failure and may void your warranty. Please contact Customer Service before adding any non-OEM part or accessory to your gun.

Why doesn’t the slide on my pistol lock back on the last round?

Lock back issues can be due to a variety of reasons. I have listed a few for you to check*: Be sure the inside of the magazines are thoroughly cleaned of any grease or lubricant. Be sure the gun has been cleaned and has plenty of lubrication on the slide/frame rails, outside of barrel and the hammer/spring assy. Some guns benefit from a break-in period – give the gun a few hundred rounds to break in and work smoothly. Try different ammunition. If the lower powered ammo is used in a new gun, it may cause feeding, extraction and lock back issues until the springs are broken in. Do all the magazines have the same result? Check your hold to be sure your thumb is not contacting the slide catch lever. A weak hold (“limp wristing”) can result in cycle / lock-back issues Does the slide lock back manually with an empty mag inserted? If so, it is most likely due to one of the tips above. *NOTE: The slide will not lock back on the last round on the Classic .22LR pistols and Conversion Kits.

Can the Short Reset Trigger System (SRT) be installed in my gun? Can I buy the parts?

The SRT will install in any DA/SA Classic Series Pistol (P220, P225, P226, P228, P229, and P239). The gun must be sent in to the factory for this service to ensure proper function. See our Custom Shop Services for details

Is it safe to dry-fire my pistol?

It is safe to dry-fire our center fire pistols. You would want to use a snap cap or plug if extensive dry-firing is done. Always count your dry-firing in your live fire count to be sure all springs and pins are in top condition. DO NOT intentionally dry-fire any rim fire pistol such as the Mosquito, .22LR conversions or Classic Pistols.

The outside of my barrel and the slide rails on my frame are showing wear – should I be concerned?

No, finish wear on the barrel and frame rails (or anywhere that metal is in contact with metal) is normal and to be expected. Always be sure your pistol is clean and adequately lubricated. For more information on maintaining your pistol please visit the Owners Manuals section.

There is a square-shaped area of Nitron missing from inside the slide of my pistol. Is this a QC issue?

No. This is normal. This area is where a fixture holds the slide during the application of the Nitron. This will NOT affect the function, quality or longevity of the metal, slide, frame or any of their components.

I own a SigPro SP2340 / SP2009 – can I mount a light or laser unit on the gun?

The SP2340/2009 SigPro pistols feature a proprietary accessory rail. In order to attach accessories to the rail you must obtain an adapter to convert the rail to a standard size such as Picatinny. These can be purchased through Shop page

Can I install a shoulder stock on my 556 Pistol?

Attention: attaching a shoulder stock to the P556 constitutes making a rifle having a barrel less than 16” in length, which is subject to the requirements and restrictions of the National Firearms Act (26 U.S.C. Ch. 53). Customers must contact the Bureau of Alcohol, Tobacco, Firearms and Explosives National Firearms Act Branch before assembly for advice on how to proceed under the federal law and regulations. Local authorities should also be contacted to determine if there are any State or municipal ordinances that may restrict this assembly.

Do any of your 1911 models come with an ambi safety?

Most of our 1911 models come with a standard left hand side thumb safety. Two of our models are equipped with an ambi safety – the STX and Blackwater. The Custom Shop does offer an ambi safety installation service for most models.

Can I attach the STL300J Stoplite vertical hand grip to my P556 or P522 pistol or any pistol with the accessory rails built in?
Yes, but it will then be an “any other weapon” which falls under the National Firearms Act and requires a “tax stamp” or “Form 4” from ATF.

I own a P250. Can I purchase a fire control unit for my X-Change kit?
SIG SAUER, Inc does not offer or sell the serialized units separately.

Are there two different recoils springs for my Mosquito pistol?
No, there is only one recoil spring offered for the Mosquito Pistol. Initial production of the pistol noted two different spring weights. Mosquitos are shipped with spare recoil spring as a replacement and is the same as the recoil spring installed in the pistol.

My mosquito pistol seems to have problems ejecting & extracting?
Please try these basic trouble shooting tips before requesting service: *Please make sure the recoil spring is installed correctly. The narrow end of the spring MUST be on the guide rod first…pointing towards the rear of the gun. If it is not, this will cause feeding, extraction and firing issues. *Like many .22 LR’s, Mosquito’s can be sensitive to ammunition used and to cleanliness and lubrication. Be sure your Mosquito is cleaned and lubricated regularly and before the first use. *There is a lubrication port on the right side of the slide for the extractor, be sure you add a drop of lube in this hole every hundred rounds or so. Make sure the gun is very clean. *Some Mosquito’s benefit from a break-in period. *Be sure to use factory recommend ammunition – CCI Mini-Mags. Winchester Super-X, Remington Golden Bullet, Federal High Velocity etc…also usually work well.

I cannot remove the thread cap from my classic line threaded barrel. What do I do?
These barrel threads are a left handed thread.

I am unable to get the slide of my 1911 back on due to the safety plunger lever being raised. What do I do?

Touch on the safety plunger lever with slight finger pressure, which should drop the lever back into its pocket. Do this before attempting to re-assemble with the slide.

Does SIG SAUER make pistols which can be sold in California or Massachusetts?

Yes we do. Please see our complete list of pistols and filter by state.

I have a Hammerli Trailside that needs parts/service. Can I send it to you?

We have not imported the Trailside pistols since 2005. We no longer have access to Hammerli or Trailside parts / accessories. Hammerli has been purchased by Carl Walther GmbH of Germany. SIG SAUER is no longer selling or servicing Hammerli products. Please direct all Hammerli related service issues and questions including those regarding the Trailside models, to: Larry’s Guns Inc. 56 West Gray Road Gray, Maine 04039,

Why were the E2 versions of the P220, P226 & P229 pistols discontinued?

The “E2” specific model pistols were a limited production run. The positive feedback we received in response to their ergonomic grips from our customers was so overwhelming that SIG SAUER, Inc has made them a permanent addition to the basic P220, P226 & P229 lineup.

My SIG SAUER pistol is not accurate. Why? What should I do?

All SIG SAUER production duty/combat pistols are set up to use a “combat” sight picture. This is where the front sight completely covers the bullseye of the target. Using a six o’clock (“pumpkin on a post”) or center mass (“half’n’half”) sight picture will result in low impact. SIG SAUER, Inc sights in all non-sporting and non-target pistols for 2 inch groupings @ 10 yards. If you are still having trouble please contact Customer Service for further help and instruction. Please have your serial number ready. There are also very helpful free Internet sites that cover pistol group analysis.