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SI designs rugged, user-focused firearm components and optics. They make accessories like slide plates, charging handles, barrel clamps, red dots, and shotgun parts.
All SI Products (2,386)
Sig Sauer P365 Outlander Yellow Laser Handgun 9mm Luger 10rd Magazines(2) 3.1 Black Barrel X-RAY 3 Sights Manual Safety
Sig Sauer P365 Tiger Striped XMACRO TACOPS Handgun 9mm Luger 17rd Magazines(4) 3.7 Barrel
Sig Sauer P365 XMACRO TACOPS "Trump Fight" Handgun 9mm Luger 17rd Magazi...
Sig Sauer P365 Two-Tone Brown/Black XMACRO TACOPS Handgun 9mm Luger 17rd Magazines(4) 4.2 Compensated Barrel
Sig Sauer P365 MuiltiCam XMACRO TACOPS Handgun 9mm Luger 17rd Magazines(4) 3.7 Barrel Black Grip
Sig Sauer 365-9-BXR3P MODLEP 9mm Leopard Print 10rd 3.1" X-RAY3 Sights
Strike Industries ARSLCHFDE Latchless Charging Handle AR-15 FDE Aluminum
SITE-LITE SL-100 Laser Boresighter 18001
Limbsaver 90102 Protective Shooting Pad Black
LimbSaver Kodiak Air Rifle Sling Black Mossy Oak Infinity 12195
Limbsaver Pro Handgun Grip Full Size Black
Limbsaver 10825 Recoil Pad Precision Fit Air Tech Ruger Amer Magnum
Limbsaver 10824 Recoil Pad AirTech Precision Fit Ruger American
Limbsaver 10817 Recoil Pad AirTech Beretta 5" Wood/Synthetic
Sims Vibration Laboratories Airtech Recoil Pad for Browning Xbolt AB3
Limbsaver 10811 AirTech Recoil Pad Beretta 5-3/8" NAVCOM Tech
Limbsaver 10801 AirTech Recoil Pad Mossberg 500C/Marlin 308MX
LimbSaver 10701 Precision Fit Recoil Pad for Beretta 5 3/8" Stock
Limb Saver Nitro Grind-To-Fit Recoil Pad Md: 10539
LimbSaver 10537 Nitro Grind-to-Fit Recoil Pad Small Black NAVCOM Material
LimbSaver 10535 Trap Grind-to-Fit Recoil Pad Medium Black NAVCOM Material
LimbSaver 10534 Trap Grind-to-Fit Recoil Pad Small Black NAVCOM Material
LimbSaver 10404 Recoil Pad Benelli M2 Tactical & SBE, NAVCOM Tech
LimbSaver Precision Fit Recoil Pad for Benelli M1 Tactical SBE NAVCOM
LimbSaver 10002 Precision Fit Recoil Pad for Browning A-Bolt Wood Stock
Limbsaver 10001 Recoil Pad, Ruger M77/Browning Gold, Black, NAVCOM Tech
Sinclair International Montana Sling Leather 2-Point Brown 1-1/4
Sinclair International 125INCHBLACK Montana Sling 1-1/4" Black
Sinclair 1" Montana Sling 1INBROWN Brown Leather Rifle Strap
Sig Sauer 365-9-BXR3P-MS Leopard Print P365 9mm 3.1" Barrel 10rd 2 Mags
Sig Sauer 365-9-BXR3P-MS 9mm P365 10rd Chocolate Chip Hydro Dip Frame
Sig Sauer P365 Gold Bug 9mm Luger 3.7 in Threaded Barrel 10rd Striker
Sig Sauer 365-9-BXR3P 9mm P365 Gold Bug 10rd 3.1" Grey Slide Brown Grip
Sig Sauer P320V004 9mm Handgun, 4.6" Barrel, 21rd, Woodland Camo, SC81
Sig Sauer 365-9-BXR3P-MS 9mm P365 Pink Filigree 3.1" 10rd X-RAY Sights
Sig Sauer 365-380-BSS-MS .380 Handgun, 3.1" Barrel, 10rd, Night Sights
Sig Sauer P365 365-9-BXR3P 9mm Handgun, 10rd, 3.1" Barrel, Night Sights
Sig Sauer 365-9-BXR3P 9mm P365 3.1" Barrel 10rd X-RAY3 Sights
Sig Sauer 365-9-BXR3P 9mm P365 Optic Ready 10rd X-RAY3 Sights 3.1" Barrel
Sig Sauer 365-9-BXR3P 9mm P365 Optic Ready Handgun, 3.1" Barrel, 10rd Mag
Sig Sauer 365-9-BXR3P-MS Mongoose Purple 9mm 10rd 3.1" X-RAY3 Sights
Sig Sauer P365-380 Rose Gold .380 Auto 3.1" 10-Rounds
Sig Sauer P365-380 380 Auto 3.1" 10-Rounds
Sierra A455008 GameChanger 7mm Remington Magnum 150gr 20 Rounds Brass
Sierra A466906 GameChanger 30-06 Springfield 165 gr Tipped GameKing 20 Rds
Sierra A444003 GameChanger .270 Win 140 gr Tipped GameKing 20 Rounds
Sierra GameChanger 6.5 Creedmoor 130 Grain Brass Cased Ammo 20 Rounds
Sierra A410302 GameChanger 243 Win 90 gr 3200 fps Tipped GameKing 20 Bx/10 Cs
About SI
Headquarters
Established
-
Country of Origin
USA
History & Heritage
SI began as an American aftermarket parts maker aimed at providing functional, affordable upgrades and accessories for shooters. Over time the brand expanded its offerings across pistol, rifle, and shotgun platforms, becoming known for practical designs and broad compatibility.
Notable Products
Popular items include charging handles, slide adapter plates, red dot sights, barrel clamps, and shotgun conversion components.
Why Choose SI?
Choose SI for straightforward, well-engineered accessories that improve usability and durability without unnecessary complexity.
Hot SI Items June 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
SilencerCo Sparrow 22 Rimfire Suppressor 22LR 5.08" Stainles
SIG SAUER 322C-ROSE-RS P322 Rose 22 LR 4" Black Anodize Semi
Sig Sauer Tango-MRS Compact Rifle Scope 1-6x24 30mm SFP BDC6
Sig Sauer Cross Sawtooth Rifle 6.5 PRC 22 inch Moss Green Fo
Sig Sauer W365XL-9-BXR3P-MS P365 XL 9mm 3.7" Nitron Semi-Aut
Sig Sauer 2401191R Picatinny Stock Adapter for AR-15, Alumin
Sig Sauer SORX1080 24MM Black Pro Optics Ready Sight
SIG SAUER E26R-9-BSS-FBZ P226 Full-Size 9mm 4.4" 2-Tone Bron
Shop SI Products
Sig SAUER MCX-SPEAR 6.8x51mm SBR 13in Semi-Auto Rifle RSPEAR
SilencerCo Sparrow 22 Rimfire Suppressor 22LR 5.08" Stainles
Sig Sauer P320 FLUX 9MM 3.9" 30RD Legion 320
Sig Sauer SLH300TIQD 300 Blackout Titanium Suppressor
SilencerCo Velos LBP 5.56 NATO/.223 4.76 In Low Back-Pressur
SIG SAUER MCX Spear SBR 7.62x51mm 13" Nitride NFA
Sig Sauer P365X Macro Tacops 9mm 3.7" 17rd Pistol
Sinclair INTERNATIONAL DIAL INDICATOR .001
Sig Sauer ROMEO1 Black Shroud Kit SOR1SK001: Medium Size, Ne
Sig Sauer 8900823 LTXG Grip Module Laser Engraved P320-X Car
Sig Sauer MCX-SPEAR LT AR Conversion Kit 5.56 NATO 11.5" Bla
Sig SAUER MCX 5.56 NATO 16in 30rd IR Cerakote FDE Rifle RMCX
SI News & Articles
Firearm Shipping Restrictions by State (2026 Update)
State-by-state guide to firearm and ammunition shipping for online buyers and FFL dealers. Current as of May 2026. Cover...
Damaged in Transit: How TheGunDock Handles Shipping Claims on Firearms and Ammo
When a firearm or ammo shipment arrives damaged, the claim process matters. TheGunDock walks through what to do, what we...
The Springfield KUNA: Roller-Delayed 9mm Pistol That's Shaking Up the PDW Market
The Springfield Armory KUNA — a roller-delayed 9mm pistol built in partnership with Croatia's HS Produkt — has becom...
The Strait of Hormuz: 2,500 Years of Trade, Arms, and Conflict
A twenty-one-mile-wide choke point has shaped the movement of goods — and weapons — across half the ancient and mode...
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