Jobs & Career Contact & support Dealer Locator EXPLORE GLOCK PISTOLS TECHNOLOGY FAN ITEMS WORLD OF GLOCK SEARCH MOS - MODULAR OPTIC SYSTEM Technology MOS Configuration MOS - Modular Optic System Configuration GLOCK engineers have developed the Modular Optic System Configuration to simplify mounting of popular optical sights. Optical sights improve the accuracy at both long and short range, it enables faster target transition and quicker sights acqusition of your target. The MOS Configuration is the best choice to hit your target. GLOCK offers MOS pistol models in Standard and Slimline MOS Configuration. STANDARD MOS GLOCK Pistol models in standard MOS Configuration come with 4 numbered GLOCK MOS Adapter plates to simplify the mounting of popular optical sights. SLIMLINE MOS The Slimline MOS Pistol models have slide cuts designed for specific micro-optics and do not include adapter plates. Check out the latest additions to the GLOCK MOS family Gen5 in 9mm Luger Trusted by law enforcement officers and military personel, the caliber 9mm Luger is one of the prefered calibers for duty pistols. G17 Gen5 MOS | Standard G19 Gen5 MOS | Compact G26 Gen5 MOS | Subcompact G34 Gen5 MOS | Competition G45 MOS | Compact Slimline MOS The slim frame of the Slimline MOS Pistols make them the perfect option for concealed carry. G43X MOS | Subcompact G48 MOS | Compact Gen5 in 40 S&W The 40 S&W caliber closes the gap between the heavy 45 Auto calibers and 9mm Luger service calibers. G22 Gen5 MOS | Standard G23 Gen5 MOS | Compact What's the difference between reflex optics (MOS) and standard iron sights? Optical sights: Within the reflex optics, you look through the reticle and focus on the target and alignment of the dot. Standard sights: With standard iron sight shooting, you align the front and rear sight with a hard focus on the front sight. Optical sights are popular in competitive shooting and are becoming increasingly popular for home defense and target shooters. How to install your optical sight on a GLOCK pistol in MOS Configuration: Standard MOS Configuration Step 1: Remove the GLOCK Cover plate first. Step 2: Select the appropiate GLOCK MOS Adapter plate, place it in the correct position and orientation. Step 3: Tighten the 2 Torx® screws to fix the GLOCK MOS Adapter plate on your GLOCK MOS Pistol. Step 4: When the GLOCK MOS Adapter plate is completely mounted on your GLOCK MOS Pistol install the optical system according to the directions of the manufacturer. Instructions for standard GLOCK MOS Models DOWNLOAD PDF HERE Slimline MOS Configuration Step 1: Remove the GLOCK Cover plate first. Step 2: To mount the MOS sight on your slide, make sure to use a M4x8 mm flat-headed screw. Step 3: Only shoot your GLOCK MOS Pistol with correctly installed GLOCK Cover plate or optical system. Warning: If the thread length of the screw exceeds 8 mm, it may cause damage to the weapon and/or may cause malfunction. GLOCK recommends a periodic check of coverplate or optic screws to ensure tightness. Instructions for GLOCK Slimline MOS models G43X MOS and G48 MOS DOWNLOAD PDF HERE Watch now! Learn more about correctly installing the MOS with adapter plates on your GLOCK by watching the Instructional Video: NEW Get to know the SLIMLINE MOS Models G43X MOS and G48 MOS LEARN MORE The following GLOCK Pistols are available in the Modular Optical System (MOS) Configuration MOS GEN4 G17 Gen4 MOS STANDARD | 9 MM LUGER COMPARE WISHLIST MOS GEN5 G17 Gen5 MOS STANDARD | 9 MM LUGER COMPARE WISHLIST MOS GEN4 G19 Gen4 MOS COMPACT | 9 MM LUGER COMPARE WISHLIST MOS GEN5 G19 Gen5 MOS COMPACT | 9 MM LUGER COMPARE WISHLIST GEN5 MOS New Release G22 Gen5 MOS STANDARD | 40 S&W COMPARE WISHLIST GEN5 MOS New Release G23 Gen5 MOS COMPACT | 40 S&W COMPARE WISHLIST GEN5 MOS New Release G26 Gen5 MOS SUBCOMPACT | 9 MM LUGER COMPARE WISHLIST MOS GEN4 G34 Gen4 MOS COMPETITION | 9 MM LUGER COMPARE WISHLIST MOS GEN5 G34 Gen5 MOS COMPETITION | 9 MM LUGER COMPARE WISHLIST MOS GEN4 G35 Gen4 MOS COMPETITION | 40 S&W COMPARE WISHLIST MOS GEN4 G40 Gen4 MOS LONG SLIDE | 10 MM AUTO COMPARE WISHLIST MOS GEN4 G41 Gen4 MOS COMPETITION | 45 AUTO COMPARE WISHLIST MOS SLIM New Release G43X MOS SUBCOMPACT | 9 MM LUGER COMPARE WISHLIST CROSSOVER GEN5 MOS G45 MOS COMPACT | 9 MM LUGER COMPARE WISHLIST MOS SLIM New Release G48 MOS COMPACT | 9 MM LUGER COMPARE WISHLIST NOTE: If not otherwise stated MOS pistols are distributed without optic. Scope of supply might vary depending on distributing country, for more details please ask your local dealer. Available MOS Adapter sets The MOS Adapter set includes a Torx® Screwdriver (TX10) and 4 Torx® screws to install the GLOCK MOS Adapter plates. All screws come with a drop of glue applied. MOS Adapter set 01* The GLOCK MOS Adapter set 01 fits for GLOCK Pistols in MOS Configuration with the slide width 25,5 mm/1.00 in. It consists of 4 numbered GLOCK MOS Adapter plates for optical sights of the following manufacturers: Adapter Docter, Meopta, Insight (01) Adapter Trijicon (02) Adapter C-More (03) Adapter Leupold (04) *MOS Adapter set 01 nDLC available for Gen5 MOS Pistol models MOS Adapter set 02* The GLOCK MOS Adapter set 02 fits for GLOCK Pistols in MOS Configuration with the slide width 28,5 mm/1.12 in and 27,5 mm/1.12 in. It consists of 4 numbered GLOCK MOS Adapter plates available for optical sights of the following manufacturers: Adapter Docter, Meopta, Insight (05) Adapter Trijicon (06) Adapter C-More (07) Adapter Leupold (08) *MOS Adapter set 02 nDLC available for Gen5 MOS Pistol models CONTACT AND SUPPORT Dealer locator GLOCK Distributors Download area General contact request Technical service and support Terms and Conditions of Sale LEGAL Imprint Legal information Data privacy Do not sell my personal information JOIN US Apply now Cookies are used on this website to improve your user experience. By using our website, you agree to the use of cookies. Read ourData Privacy Policy Cookie Settings Reject All Accept Cookies