Rifle Gas System Parts
- In StockLANTAC .750 Set Screw LowPro Gas Block (LA00243)Manufactured to the highest quality standardsDesigned to fit .750" gas seat diameter barrelsComes complete with two #10-32 X .125'' set screws and gas tube roll pinBlack Finish$63.90
- In StockBRAVO COMPANY AR-15 .625 Low Profile Black Gas Block (BCM-LGB-625)BCM Low Profile Gas Block for AR15, M16, M4, M4A1Machined of steel, phosphate finish, for .625 barrelsManufactured within very tight Mil-Spec tolerances on all ID'sBarrel ID honed after finish per ...$49.78★★★★★1 review(s)
- In StockYANKEE HILL .750in Low Profile Gas Block (YHM-9383)This gas block is a set set screw style and is designed for .750AR-15 PlatformLow ProfileBlack Finish$28.00★★★★★3 review(s)
- In StockCMC TRIGGERS AR15/AR10 Gas Tube - Nitride Coated Mid Length (81623)Mid Length Gas Tube 11.75"304 StainlessNitride Coated100% Lifetime Warranty Precision machined from 304 Stainless Steel, CMC Triggers AR15/AR10 gas tubes have an extremely durable Nitride finish ...$28.34
- In StockCMMG Low Profile 0.936in Gas Block (55DA36F)Fits an AR15Low profile gas blockIncludes installation screws$39.82
- In StockCMMG Low Profile 0.625in Gas Block (55DA3AC)Fits an AR15$39.82
- In StockLANTAC Intermediate Length Nitrided Gas Tube (GT-I6003)Intermediate LengthPrecision manufactured from stainless steel extruded tubeBlack Nitrided for enhanced corrosion resistance, heat and erosion resistance over standard untreated tubesNitrided ...$32.36
- In StockLANTAC Rifle Length Nitrided Gas Tube (GT-R6004)Rifle LengthPrecision manufactured from stainless steel extruded tubeBlack Nitrided for enhanced corrosion resistance, heat and erosion resistance over standard untreated tubesNitrided tubes run ...$32.36
- In StockSPIKE'S TACTICAL .625 Micro Gas Block with Screws (SUGB110)High quality standard AR-15 height double set screw gas blockBlack Nitride Coated Finish$36.09
- In StockAERO PRECISION Stainless Steel Carbine Length Gas Tube (APRH100017C)Gas Tube for carbine length gas systemsRoll pin includedMade in the USA$17.59
- In StockAERO PRECISION Stainless Steel Pistol Length Gas Tube (APRH100027C)Gas Tube for pistol length gas systemsRoll pin includedMade in the USA$24.21
- In StockAERO PRECISION Stainless Steel Rifle Length Gas Tube (APRH100199C)Gas Tube for rifle length gas systemsRoll pin includedMade in the USA$26.36
- In StockMIDWEST .750 Low Profile Gas Block (MCTAR-LPG)Constructed from 4140 steelFor .750 diameter barrelsLow profile design will fit under most commercially available handguardsBlack Finish$51.07
- In StockMIDWEST Medium Height Picatinny Gas Block (MCTAR-UHGB)Constructed from 4140 steelFor .750 diameter barrels1913 Spec Rail machined to same height as A-4 uppersBlack Finish$73.53
- In StockMIDWEST .750 Low Profile Gas Block (MI-MGB-750)1.125 inches in lengthConstructed from 4140 steelSecures with two set screwsLow profile design will fit under most commercially available handguardsFor .750 diameter barrelsBlack Finish$48.57
- In StockMIDWEST INDUSTRIES AK Railed Gas Tube (MI-AKRGT)Provides a lower 1/3 co-witness sight picture with Aimpoint micro red dot sightsEasy installation, with no permanent modification to the firearmInternal profile made to same profile as the ...$108.05
- In StockLBE UNLIMITED AR15 Carbine Length Gas Tube (ARGTC)Made from 304SS Seamless TubingGastube Roll Pin IncludedMade in the USA The LBE UNLIMITED AR-15 Gas Tube, Carbine Length (ARGTC) is a carbine length gas tube for AR15.$21.09
- In StockPOF Dictator 9 Position Carbine Length Gas Block (837)9 positionAdjustableLow profileStraight gas tubeCarbine Length$147.55
- In StockPOF Dictator 9 Position Mid-Length Gas Block (838)9 positionAdjustableLow profileStraight gas tubeMid-length$130.35
- In StockSPIKE'S TACTICAL Melonited Pistol Length Gas Tube (SUGT0M1)Mil-Spec 304 stainless steelMelonite finishComes with stainless steel roll pinPistol-length: 6.75 in.Weight: .38 oz.$24.25
A gas system of an AR rifle encompasses a gas block and a gas tube. The gas block fits over the barrel, typically replacing the front sight base, and is responsible for controlling the flow of gas from the fired cartridge back into the system, while the gas tube directs the gas from the gas block back into the firearm's action, causing the bolt to cycle.
Rifle Gas System Lengths
- Pistol length gas system is used in AR pistols and some very compact SBRs (with a barrel fo 10 inches and shorter). It operates under high pressure, cycling the action quickly, but while this can lead to hard recoil and increased wear on parts, it's necessary for reliable functioning in compact firearms.
- Carbine length gas system is the standard for most military M4 rifles and civilian AR-15s with shorter barrels (usually up to 16 inches). It offers a good balance between reliability and recoil, making it a popular choice for general use.
- Mid-Length gas system is designed to work best with barrels that are around 18 inches long, offering smoother cycling and less recoil than the carbine system.
- Rifle length gas system is intended for use with full-length, 20-inch barrels. This system provides the softest recoil and smoothest operation, but it requires a longer barrel to function reliably.
Now, an adjustable gas block allows you to adjust the amount of gas flowing into the system, enabling you to fine-tune your rifle's performance to suit different ammunition types or suppressor use.
AR-15 Gas Blocks & Gas Tubes
At GRITR Sports, we offer the best in AR-15 gas blocks & gas tubes, sourced from industry-leading brands. Whether you're looking for a lightweight low-profile gas block from 2A Armament, a dependable gas tube from Odin Works, a durable AR15 adjustable gas block from Aero Precision, or a high-quality gas system from Spike’s Tactical, we've got you covered. So why wait? Upgrade your AR-15 with top-notch gas system parts from GRITR Sports today!
FAQ
What is an adjustable gas block?
An adjustable gas block allows you to control the amount of gas directed back into the rifle's action. This can help manage recoil, reduce wear on the firearm, and allow for customization based on different ammunition loads or suppressor use.
How do I choose the right size gas block?
The size of the gas block should correspond with the outer diameter of your firearm's barrel. Common sizes include .625", .750", and .936".
What is a low-profile gas block?
A low-profile gas block is designed to fit under a free-float handguard. They're typically used in custom builds where the user wants a longer handguard than the gas system length.