The Glock 45 represents the crossover concept at its finest—pairing a compact G19-length slide with a full-size G17 grip to deliver duty-grade capacity in a faster-handling package. Developed from Glock's military proposal and adopted widely across law enforcement, the G45 thrives in defensive, duty, and mixed carry roles where reliability and versatility matter.
Whether you're running a standard G45 or the MOS optics-ready variant, the right accessories unlock the platform's full potential for concealed carry, home defense, and professional use.
This guide covers holsters, optics mounting solutions, weapon lights, magazines, triggers, and essential support gear tailored specifically to the G45's crossover design.
Holsters for Glock 45 Guns
The Glock 45's unique dimensions—G19-length slide with G17-length frame—require holsters specifically molded for this crossover profile. Quality Glock 45 holsters accommodate the full-size grip while clearing the compact slide, and modern duty setups demand compatibility with weapon-mounted lights and red dot optics.
IWB Holsters
Inside-the-waistband carry suits the G45's concealment-oriented design for everyday carry and plainclothes duty applications. The full-size G17 grip provides 17-round capacity but requires proper belt support and clothing selection to prevent printing. Premium IWB holsters use adjustable retention screws, reinforced mouths that resist collapse during reholstering, and sweat guards that protect both firearm and body.
OWB Paddle Holsters
Paddle holsters eliminate belt threading via wide paddles that slide inside the waistband, making them ideal for range trips, training sessions, or situations requiring frequent holster removal. The paddle distributes the G45's loaded weight (approximately 32 ounces) across a larger waistband area than standard belt clips.
OWB Belt Holsters
Outside-the-waistband belt holsters remain the dominant carry method for duty, competition, and open carry applications. Belt holsters offer superior weight distribution, faster draw speeds, and better retention compared to IWB configurations. Duty-grade OWB holsters feature active retention mechanisms, reinforced construction, and explicit compatibility with common weapon lights.
Appendix Holsters
Appendix carry positions the G45 at the front of the waistline between belt buckle and hip bone, providing excellent concealment and fast access for defensive applications. Dedicated appendix holsters use integrated wedges or claws that rotate the grip toward the body, preventing printing while maintaining comfortable all-day wear.
Hook & Loop Holsters
Hook-and-loop mounting systems provide quick attachment to plate carriers, vehicle interiors, chest rigs, or unconventional surfaces where traditional belt mounting proves impractical. These holsters suit tactical applications, vehicle-mounted defensive setups, or specialized roles where belt carry interferes with mission equipment.
Drop Leg Holsters
Thigh-mounted drop-leg rigs position the G45 lower on the body, clearing bulky tactical gear, plate carriers, and equipment belts while maintaining accessibility. Adjustable leg straps distribute weight across the thigh, though proper adjustment remains critical to prevent holster migration during running or physical activity.
Belly Band Holsters
Belly bands wrap around the torso via elastic material, providing holster capability when traditional belt mounting isn't feasible. These holsters suit athletic wear, situations requiring deep concealment, or backup gun carry. Quality belly bands use reinforced holster pockets with trigger guard coverage, moisture-wicking materials, and adjustable retention straps.
Chest Holsters
Chest-mounted holsters keep the G45 accessible during outdoor activities, ATV riding, hunting, or situations where hip carry interferes with seated positions or backpack hip belts. Quality chest rigs use padded, adjustable harness systems that distribute weight across shoulders and prevent bouncing through rough terrain.
Level 2 Retention Holsters
Level 2 retention adds an active retention device beyond basic friction retention—typically a hood, rotating guard, or button release that prevents weapon removal without deliberate manipulation. These holsters suit uniformed duty, open carry, or situations requiring enhanced weapon security against grab attempts.
Level 3 Retention Holsters
Level 3 retention incorporates multiple active retention devices, typically combining hood, rotating guard, and additional locking mechanisms that require sequential manipulation for weapon access. Reserved for uniformed law enforcement and military applications where weapon retention against active resistance takes priority over draw speed. Level 3 holsters demand training to develop consistent release sequences under stress.
Optics and Red Dot Sights for Glock 45
The G45 MOS variant features Glock's Modular Optic System with removable cover plates that accept various red dot footprints via adapter plates. Factory MOS mounting accommodates Trijicon RMR-pattern optics and other popular micro dots without permanent slide modification, while non-MOS slides require aftermarket milling services for direct mounting.
Red dots dramatically improve target acquisition speed and precision across lighting conditions compared to iron sights, particularly under stress where traditional sight alignment breaks down.
The MOS system provides rugged mounting when installed correctly with proper torque specs, thread-locker, and correct-length screws.
Direct Mount vs MOS Plates
Direct milling creates precision-cut optics mounting surfaces machined into the slide, offering lower mounting heights and maximum rigidity compared to MOS adapter plates.
Professional milling services accommodate multiple footprints while maintaining structural integrity and often allow suppressor-height iron sight retention. MOS plates provide optics capability without permanent modification, trading slightly higher sight lines for installation reversibility and lower upfront cost.
Both mounting methods deliver duty-grade reliability when properly executed with correct hardware and torque specifications.
Popular Red Dot Options
Trijicon RMR Type 2 remains the gold standard for duty applications, offering bombproof durability, excellent glass clarity, and proven reliability through extreme conditions. Holosun 507C and 508T bring multiple reticle options, solar backup capability, and titanium housings at lower price points than RMR. SIG Romeo1 Pro and Leupold DeltaPoint Pro suit users preferring larger sight windows and streamlined profiles.
Shield RMSc-footprint dots work on compact pistols but typically don't mount directly to G45 MOS without adapters. Battery life, reticle size, window dimensions, and environmental sealing drive selection alongside budget and intended use.
Suppressor-Height Sights
Red dot installations should preserve backup iron sight capability via suppressor-height front sights and appropriate rear sight configurations.
Lower-1/3 cowitness places iron sights in the lower portion of the optic window, allowing dot use while maintaining iron visibility if electronics fail. Absolute cowitness aligns iron sights with the dot at identical heights, creating potential sight picture clutter but ensuring precise alignment.
Many shooters run optics without backup irons on dedicated duty guns to maximize sight picture, while defensive users prioritize iron retention for redundancy.
Installation Best Practices
When mounting optics on the G45 MOS, use medium-strength thread-locker on all mounting screws, verify correct screw length to prevent threading into slide internals, and torque screws to manufacturer specifications using inch-pound torque drivers.
Confirm zero with live fire after installation and re-check torque after the first 50-100 rounds as screws settle under recoil. Clean mounting surfaces thoroughly before installation to prevent debris from affecting seating or zero retention.
Weapon Lights and Lasers for Glock 45
The G45's full-length Gen5 rail supports duty-grade weapon-mounted lights from major manufacturers.
Defensive setups demand adequate output (500+ lumens) for positive target identification, while duty applications often specify 1000+ lumen lights for standoff capability and area illumination.
Duty-Grade Weapon Lights
Streamlight TLR-1 HL delivers 1000 lumens with proven reliability and widespread holster compatibility, making it the go-to choice for duty and home defense applications.
SureFire X300 Ultra provides 1000 lumens with bombproof construction suited to extreme duty use and harsh environments. Both lights feature ambidextrous activation, secure rail attachment, and extensive aftermarket holster support. These full-size lights add length forward of the muzzle but provide maximum output and run time.
Compact Weapon Lights
Streamlight TLR-7A offers 500 lumens in a compact package that doesn't extend past G19-length slides, balancing adequate output with reduced bulk for concealed carry. Nightstick TCM-550XL delivers similar output with unique rear-positioned controls.
These compact lights work well for G45 concealed carry setups where full-size light bulk would compromise concealment or printing. Output suffices for defensive target identification within typical engagement distances.
Light-Bearing Holster Compatibility
Weapon lights change pistol dimensions, requiring holsters explicitly molded around specific light models. Modern holster manufacturers produce G45-with-TLR-7A, G45-with-TLR-1, and G45-with-X300 specific holsters that maintain proper retention and trigger coverage.
Many duty holsters now come standard with light compatibility, while concealment holsters require selecting light-specific models. Verify holster compatibility before purchase or plan for custom fabrication.
Laser Sights
Grip-integrated lasers from Crimson Trace or dedicated rail-mounted laser/light combos suit users preferring visible aiming points over red dots. Lasers excel for extreme close-quarters situations or unconventional shooting positions where traditional sight alignment proves difficult.
Most defensive trainers prioritize weapon-mounted lights over lasers for target identification capability, though combination units provide both capabilities in integrated packages.
Magazines and Base Pads for Glock 45
The G45 ships with three 17-round magazines using G17 magazine bodies that work across the full-size Glock 9mm family.
Magazine reliability drives defensive and duty function, making OEM magazines the baseline standard with aftermarket options requiring thorough testing before trust.
OEM Glock Magazines
Factory 17-round magazines represent the reliability gold standard, delivering consistent function with all ammunition types through proven construction and quality control. Glock's Gen5 magazines feature orange followers, redesigned feed lips, and ambidextrous viewing slots.
Standard 17-round mags work universally across G17, G19, G45, and other 9mm Glocks, while higher-capacity 19-, 24-, and 33-round magazines provide extended capacity for duty or competition use.
Extended Magazines
Glock 19-round magazines essentially use G17 17-round bodies with +2 base pad extensions, adding capacity without excessive length. These magazines work reliably in G45 pistols and remain popular for duty use where maximum capacity matters.
Extended 24-round magazines provide substantial capacity for competition or backup duty use, though added length may interfere with concealment. Factory 33-round magazines suit training, competition, or specialized applications requiring maximum ammunition capacity.
Aftermarket Magazine Options
ETS (Elite Tactical Systems) produces translucent polymer magazines in various capacities, allowing visual ammunition counts but requiring individual testing for reliability before defensive adoption.
Magpul PMAG GL9 magazines offer reinforced construction and competitive pricing, earning positive reliability reviews from many users. SGM Tactical produces budget magazines suitable for training use, though reliability may not match OEM standards.
Serious defensive use demands factory Glock magazines or thoroughly-vetted aftermarket alternatives with documented reliability.
Magazine Extensions and Base Pads
Competition base pads from manufacturers like Taran Tactical, Agency Arms, and SLR Rifleworks add 1-4 rounds beyond factory capacity while improving reload indexing through enlarged openings and extended profiles.
These aluminum or polymer pads attach via modified retaining plates and often require extended magazine springs for reliable feeding.
Magazine extensions suit competition use where division rules permit extended capacity, while most defensive users stick with factory base pads for proven reliability.
Triggers and Fire Control Components for Glock 45
The G45's factory Safe Action trigger provides adequate performance for most users, delivering approximately 5.5-pound pull weight with predictable reset.
Aftermarket triggers reduce pull weights, shorten reset distances, and alter trigger face profiles for improved ergonomics and performance.
Aftermarket Trigger Options
Apex Tactical Flat-Faced Trigger provides straighter trigger pull geometry with reduced pull weight (approximately 4.5 pounds) and crisp break characteristics.
Overwatch Precision TAC trigger delivers shorter reset and improved trigger face ergonomics while maintaining factory safety standards. Agency Arms AOS trigger offers adjustable pre-travel and overtravel with match-grade performance suited to competition applications.
All trigger upgrades must preserve drop safety and safe sear engagement—improper installation or excessive modification creates serious safety hazards.
Trigger Connectors
Aftermarket connectors from manufacturers like Ghost Inc., Lone Wolf, and ZEV Technologies modify trigger pull characteristics by changing the angle where trigger bar and connector interface. 3.5-pound connectors reduce factory pull weight by approximately two pounds, creating lighter breaks suited to competition but potentially questionable for defensive carry.
Smooth connectors reduce grittiness while maintaining factory pull weights, improving trigger feel without safety concerns.
Trigger Springs
Reduced-power trigger springs from Wolff, Ghost Inc., and similar manufacturers decrease pull weight by reducing spring resistance during trigger pull.
Spring modifications must maintain reliable striker engagement and firing pin velocity for consistent ignition across primer types and environmental conditions. Excessively light springs risk light primer strikes with harder primers or reduced-power ammunition.
Safety Considerations
All trigger modifications carry potential safety implications—sub-4-pound triggers increase unintentional discharge risk under stress and may create legal scrutiny in defensive shooting investigations.
Reserve competition-tuned triggers with aggressive modifications for dedicated match guns rather than defensive carry pistols. Professional installation and function verification through drop tests and live fire testing ensure modifications maintain Glock safety standards.
Grips and Grip Enhancements for Glock 45
The G45's factory Gen5 grip texture provides adequate purchase for most shooters, though aftermarket grip modifications improve control during rapid fire, adverse conditions, or extended shooting sessions.
Grip Tape and Granulate Texture
Talon Grips produces adhesive grip panels in rubber and granulate textures, providing customizable grip textures without permanent frame modification.
Rubber texture offers comfortable all-day carry with adequate purchase, while granulate texture delivers aggressive traction during high round counts or wet conditions. Grip tape installs easily via adhesive backing and removes cleanly, allowing experimentation with different textures without permanent commitment.
Stippling Services
Professional stippling permanently alters frame texture via heated tools that melt and reshape polymer surfaces.
Custom stippling provides maximum grip security through aggressive patterns tailored to individual hand size and grip preferences. Quality stippling maintains structural integrity and ergonomic comfort while maximizing traction.
Stippling represents permanent modification that may affect resale value but delivers unmatched grip security for serious users.
Frame Modifications
Undercut trigger guards and high grip modifications allow shooters to achieve higher hand positions, reducing muzzle flip and improving recoil control. These modifications typically require professional machining services or frame replacement with pre-modified aftermarket frames from companies like Suarez International or Agency Arms.
Frame modifications should preserve structural integrity and avoid weakening areas subjected to firing stresses.
Sights for Glock 45
Factory plastic sights work adequately but represent the first upgrade target for most G45 owners. Steel sights improve durability, while fiber-optic and tritium options dramatically enhance target acquisition across lighting conditions.
Night Sights
Tritium night sights from Trijicon, Meprolight, and AmeriGlo provide self-luminous aiming points in complete darkness, critical for home defense where light switches may not be accessible.
Three-dot configurations illuminate both front and rear sights, while two-dot arrangements place tritium only in the rear to reduce front sight distraction. Tritium brightness fades over 10-12 years, requiring eventual replacement as visibility decreases.
Fiber-Optic Sights
Fiber-optic front sights gather ambient light into brilliant aiming points that accelerate target acquisition under varied lighting conditions. TruGlo, HiViz, and Dawson Precision manufacture Glock-specific fiber-optic sights in multiple colors and heights.
Many shooters pair fiber-optic fronts with plain black rears to create high-contrast sight pictures supporting rapid shooting. Fiber-optic elements can break under impact but typically outlast factory plastic sights for durability.
Suppressor-Height Sights
Taller suppressor-height sights allow sight picture retention when using sound suppressors or when cowitnessing with red dot optics.
These sights sit approximately 0.4" taller than standard sights, clearing most suppressor profiles while providing backup aiming when running red dots. Suppressor-height sights work with standard G45 slides and remain essential for MOS setups using micro dots.
Adjustable Sights
Adjustable rear sights allow windage and elevation adjustments for precise zeroing with specific ammunition or accommodating varying distances. LPA and Bomar produce Glock-compatible adjustable sights suited to precision shooting and load development. Most defensive users prefer fixed sights to avoid adjustment drift under recoil or accidental manipulation, reserving adjustable sights for competition or specialized applications.
Maintenance Tools and Cleaning Supplies for Glock 45
The 9mm chambering generates moderate fouling that accumulates in the barrel, chamber, and action components. Regular cleaning maintains reliability and accuracy while preventing excessive wear from carbon and debris buildup.
Essential Cleaning Tools
Quality cleaning kits include bronze bore brushes sized for 9mm bores, chamber brushes that remove stuck cases and carbon rings, and proper-length cleaning rods that won't damage barrel crowns. Glock-specific tools include the factory disassembly tool (or 3/16" punch) for field stripping, detail brushes for reaching action components, and quality patches for bore cleaning.
Recommended Cleaning Products
Hoppe's No. 9, Break-Free CLP, or Slip 2000 EWL provide effective carbon removal and lubrication for general maintenance.
More aggressive copper solvents suit shooters running copper-jacketed ammunition through high round counts, though Glocks rarely require dedicated copper removal. Quality gun oils or greases like Slip 2000 EWL, ALG Go-Juice, or Lucas Oil Gun Oil provide adequate lubrication for slide rails and action components.
Maintenance Schedule
Defensive G45 pistols require cleaning every 500-1000 rounds or annually, whichever comes first, to maintain peak reliability.
Duty guns seeing daily carry and potential environmental exposure benefit from quarterly detailed cleaning and lubrication checks. Competition guns demand cleaning after every match to maintain peak accuracy and function. Lubrication focuses on slide rails, barrel lugs, connector interface, and trigger mechanism—excess lubricant attracts debris and should be avoided.
Cases and Storage for Glock 45
Proper storage protects the G45's finish and maintains mechanical function through periods of non-use. Quality cases provide transport protection while meeting TSA requirements for checked firearm transport.
Hard Cases
Hard pistol cases from Pelican, Nanuk, or similar manufacturers provide crush-proof protection during transport, meeting TSA requirements for airline travel when properly locked. Foam cutouts secure the pistol and accessories, preventing movement during handling. Hard cases suit range trips, vehicle storage, or any application requiring maximum protection against impact and environmental exposure.
Soft Cases and Range Bags
Padded soft cases or pistol rugs offer lighter protection suitable for range trips while preventing holster wear on finishes.
Range bags with dedicated pistol compartments organize firearms, ammunition, and accessories in single packages suited to training sessions or competition. Soft storage reduces bulk compared to hard cases but provides less impact protection.
Home Storage Solutions
Quick-access safes sized for full-size pistols maintain ready accessibility for home defense while securing firearms from unauthorized access. Climate-controlled gun safes prevent humidity damage during long-term storage, particularly important in humid environments. Dehumidifiers or desiccant packs protect against rust and corrosion during extended storage periods.
Conclusion - Top Glock 45 Accessories
Outfitting your Glock 45 with appropriate accessories maximizes its crossover potential across duty, defensive, and training applications.
Quality holsters molded specifically for the G45's unique dimensions ensure secure retention and consistent accessibility across carry methods. Red dot optics via MOS mounting or professional milling dramatically improve target acquisition and precision. Duty-grade weapon lights from Streamlight or SureFire provide essential low-light capability and target identification.
Factory or thoroughly-vetted aftermarket magazines maintain the reliability Glocks are known for, while extended magazines and base pads address capacity needs for duty or competition.
Carefully-selected trigger upgrades improve shooting performance while maintaining safety standards appropriate for defensive use. Aftermarket sights deliver low-light capability and faster target acquisition compared to factory plastic sights.
Whether you're running the G45 for law enforcement duty, concealed carry, or home defense, these accessories transform the crossover platform from capable factory configuration into a fully optimized system matched to your specific mission requirements.