
5.56x45 Rifles
- In StockSPRINGFIELD ARMORY Hellion 5.56mm 16in 30rd OD Green Bullpup Semi-Automatic Rifle (HL916556G)Bullpup ConfigurationReversible Ejection SystemAmbidextrous ControlsAdjustable Short-Stroke Gas PistonVortex Crossfire OpticSingle Point Sling The SPRINGFIELD ARMORY Hellion 5.56mm Bullpup ...$1,722.99
- In StockFAXON Sentry 5.56 NATO 16in 30rd Semi-Auto Rifle (FX5216)16" 556 Gunner Profile Barrel in Nitride CoatedEnhanced Forged Receiver Set with Tensioning ScrewNitrided M16 BCG with Superfinish15" M-LOK Aluminum HandguardHiperfire EDTDM Single Stage ...$1,023.99
- In StockCMMG Resolute MK4 5.56 16.1in 30rd Armor Black Semi-Automatic Rifle (55A9D0B-AB)Zeroed drop-in triggerZeroed 60°/90° ambi safetyZeroed AR15 ambi charging handleZeroed AR15 bolt catchZeroed AR15 polymer dust coverZeroed pistol gripZeroed extended mag release buttonZeroed ...$1,420.99
- In StockCMMG Resolute MK4 5.56 16.1in 30rd Coyote Tan Semi-Automatic Rifle (55A9D0B-CT)Zeroed drop-in triggerZeroed 60°/90° ambi safetyZeroed AR15 ambi charging handleZeroed AR15 bolt catchZeroed AR15 polymer dust coverZeroed pistol gripZeroed extended mag release buttonZeroed ...$1,379.99
- In StockSPRINGFIELD ARMORY SA-16 5.56x45mm 20in 30rd Semi-Automatic Rifle (SA920556BA2)A2 carry handle features an integrated dual aperture rear site adjustable for windage and elevationFixed stock provides a stable foundation for shootingFixed stock includes a trapdoor storage ...$1,000.99
- In StockCMMG Dissent MK4 5.56mm 16.1in 30rd Armor Black Compact Action Rifle (55A1A0B-AB)Mk4 Forged 7075-T6 Aluminum Lower ReceiverDissent 7075 T6 Aluminum Upper Receiver16.1" 4140 Chrome Moly Steel Barrel (Salt Bath Nitride Finish)Proprietary CMMG 15" Aluminum M-LOK ...$1,899.99
- In StockSPRINGFIELD ARMORY Hellion 5.56x45mm NATO 16in 30rd Flat Dark Earth Semi-Automatic Bullpup Rifle (HL916556F)16" CMV Melonite Barrel4-Prong Flash HiderIntegrated Flip-Up Front SightIntegrated Flip-Up Rear Sight with 5-Position Aperture5-Position Adjustable StockRifle Case Included The SPRINGFIELD ...$1,722.99
- In StockSPRINGFIELD ARMORY Hellion Low Capacity 5.56x45mm NATO 16in 10rd OD Green Semi-Automatic Bullpup Rifle (HL916556GLC)16" CMV Melonite Barrel4-Prong Flash HiderIntegrated Flip-Up Front SightIntegrated Flip-Up Rear Sight with 5-Position Aperture5-Position Adjustable StockRifle Case Included The SPRINGFIELD ...$1,722.99
- In StockSPRINGFIELD ARMORY Hellion Low Capacity 5.56x45mm NATO 16in 10rd Gray Semi-Automatic Bullpup Rifle (HL916556YLC)16" CMV Melonite Barrel4-Prong Flash HiderIntegrated Flip-Up Front SightIntegrated Flip-Up Rear Sight with 5-Position Aperture5-Position Adjustable StockRifle Case Included The SPRINGFIELD ...$1,722.99
- In StockSPRINGFIELD ARMORY Hellion 5.56x45mm NATO 18in 30rd Semi-Automatic Bullpup Rifle (HL918556B)18" CMV Melonite Barrel4-Prong Flash HiderIntegrated Flip-Up Front SightIntegrated Flip-Up Rear Sight with 5-Position Aperture5-Position Adjustable StockRifle Case Included The SPRINGFIELD ...$1,739.99
- In StockSPRINGFIELD ARMORY Hellion 5.56x45mm NATO 20in 30rd Semi-Automatic Bullpup Rifle (HL920556B)20" CMV Barrel with Bayonet Lug4-Prong Flash HiderIntegrated Flip-Up Front SightIntegrated Flip-Up Rear Sight with 5-Position Aperture5-Position Adjustable with Cheek RiserRifle Case Included ...$1,752.99
- In StockSPRINGFIELD ARMORY Hellion 5.56x45mm NATO 20in 30rd Semi-Automatic Bullpup Rifle, CA Compliant (HL920556BCA)20" CMV Melonite BarrelSA Muzzle BrakeIntegrated Flip-Up Front SightIntegrated Flip-Up Rear Sight with 5-Position ApertureFixed StockRifle Case Included The California compliant SPRINGFIELD ...$1,752.99
- In StockSPRINGFIELD ARMORY Saint Victor 5.56x45mm NATO 16in 30rd Semi-Automatic Rifle (STV916556BX)16" CMV Melonite BarrelLow Profile Spring-Loaded Adjustable Flip-Up SightsForged 7075 T6 Aluminum Upper and Lower ReceiverDirect Impingement Mid-Length Gas SystemB5 Systems Enhanced SOPMOD ...$1,173.99
- In StockSPRINGFIELD ARMORY Saint Victor Low Capacity 5.56x45mm NATO 16in 10rd OD Green Semi-Automatic Rifle (STV916556GPLC)16in Chrome Moly Vanadium BarrelFlip Up Front and Rear SightsSingle-Stage TriggerThumb Safety For when you need the indisputable downrange authority of the SPRINGFIELD ARMORY Saint Victor Low ...$1,008.99
- In StockSPRINGFIELD ARMORY Saint Victor 5.56x45mm NATO 16in 30rd Gray Semi-Automatic Rifle (STV916556YP)16" CMV Melonite BarrelLow Profile Spring-Loaded Adjustable Flip-Up SightsForged 7075 T6 Aluminum Upper and Lower ReceiverMagpul MOE SL StockNickel Boron Coated Flat GI TriggerRifle Case ...$1,008.99
- In StockSPRINGFIELD ARMORY Saint Victor Low Capacity 5.56x45mm NATO 16in 10rd Gray Semi-Automatic Rifle (STV916556YPLC)16in Chrome Moly Vanadium BarrelFlip Up Front and Rear SightsSingle-Stage TriggerThumb Safety For when you need the indisputable downrange authority of the SPRINGFIELD ARMORY Saint Victor Low ...$1,008.99
- In StockRADICAL FIREARMS 5.56 NATO 16in 30rd B5 Bravo Stock Semi-Auto Rifle with 12in RPR (FR16-5.56SOC-12RPR)5.56x45mm NATO16" SOCOM Threaded BarrelMid Length Gas SystemA2 Flash HiderB5 Bravo StockB5 Type 23 Pistol Grip12" RPR Free Float M-LOK HandguardCarbine MIL-STD Buffer Tube30rd Magazine ...$644.47
- In StockRADICAL FIREARMS 5.56 NATO 16in 30rd Semi-Auto Rifle with 12in RPR and MFT Furniture (FR16-5.56SOC-12RPR-MFT)5.56x45mm NATO16" SOCOM Threaded BarrelMid Length Gas SystemA2 Flash HiderMFT Minimalist StockMFT EPG16V2 Grip12" RPR Free Float M-LOK HandguardCarbine MIL-STD Buffer Tube30rd Magazine ...28% off$446.99$620.82
- In StockCMMG Resolute MK4 5.56mm 16.1in 30rd Tungsten Semi-Automatic Carbine Rifle (55A9D0B-TNG)Zeroed drop-in triggerZeroed pistol gripZeroed trigger guardZeroed 60°/90° ambi safetyZeroed AR15 ambi charging handleZeroed ambi mag catchZeroed extended mag release buttonZeroed AR15 bolt ...$1,420.99
- In StockCOLT'S MANUFACTURING M4 Magpul 5.56mm NATO 16.1in 30rd Semi-Automatic Rifle (CR6920MPS-FDE)16.1in Barrel1:7 Barrel TwistA2 Flash Hider1/2x28 Thread PitchFixed Front Sight PostFolding Rear SightForged Lower ReceiverMil Spec TriggerMagpul Foregrip6 Position Buffer Tube The COLT'S ...$1,090.99
Carrying the honor of being the new standard NATO rifle cartridge, 5.56 x 45 became one of the most popular rifle calibers on the market. It was developed on the base of the .223 Remington cartridge and even though the two are not entirely identical, they have similar dimensions. 5.56 rifles have less maneuverability than corresponding handguns, but the former are more numerous. Combining high velocity and magazine capacity with a small size and lightweight design, the 5.56 cartridge became a people’s champion for a reason.
Even though these two calibers carry different names, their story is closely intertwined. It all began with the development of the .223 Remington cartridge that was launched together with the development of a whole new lightweight combat rifle. U.S. Continental Army Command initiated the project to find an alternative to 7.62x51 rifles. Several famous gun makers were invited to participate, including Fairchild Industries, Remington Arms, and Winchester Arms. After two years of development, a .223 Remington cartridge (former .222 Special) was established. In 1963, it was officially accepted and named "Cartridge, 5.56mm ball, M193." In some seven years, NATO members decided to choose another standard caliber, a smaller one, that would replace 7.62x51mm. .223 Remington was chosen as a base for the future cartridge, and, with several changes, it turned into a 5.56 x 45mm cartridge. It had an unconditional advantage of light weight, allowing the soldiers to carry more ammunition for the same weight, in addition to high-velocity and small size.
Gritr Sports has many models of 5.56 assault rifles for sale. We sell firearms that bear the mark of quality of the most well-known gun makers. Here you can find 5.56 NATO guns, produced by such brands as Daniel Defense, Diamondback, Springfield Armory, Windham Weaponry, Black Rain Ordnance, Smith & Wesson, and several others. The variety is what we take pride in, so you will definitely find something to your liking.