Find a complete breakdown of AR upper parts below split into easy to navigate categories. The biggest brands and the largest selection around. When building your next firearm, you’ll arrive to the upper parts and may get overwhelmed with the overall number of parts that make up the upper assembly as well as the different options available to you.
From the barrel itself to the charging handle, handguards, gas blocks, muzzle devices, complete uppers and everything in between. Click-Click-Boom has you covered with all of the biggest brands as well as parts for those on a budget.
The upper receiver parts we have are the best we can find, because we know ARs, and that means we know the importance of quality. All of our AR upper parts and accessories have been selected with quality in mind, so when you shop with us, you can do so with confidence. Check out our upper receiver parts for sale and invest today!
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AR/AK Barrels
18 products -
Bolts, Carriers & BCG
18 products -
Charging Handles
16 products -
Complete Uppers
30 products -
Forward Assist / Dust Covers
26 products -
Gas Blocks
15 products -
Gas Tubes
9 products -
Handguards
33 products -
Misc Upper AR Parts
83 products -
Muzzle Devices
24 products -
Upper Receivers
12 products -
AR AK Parts, AR Upper Parts, Charging Handles, Gun Parts
Bushmaster AR-15 Charging Handle Mil-Spec 6061 Hard Coating Black Anodized Aluminum
Bushmaster AR-15 Charging Handle Mil-Spec 6061 Hard Coating Black Anodized Aluminum
CompareEarn 19 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Upper Receivers
Alexandria Pro-Fab Co. .308 Low Profile Upper Receiver Stripped
Our AR308 upper receivers are machined from 6061 billet aluminum. Stripped low profile, with T marks. Dpms Gen 1 style/compatible.
CompareEarn 159 Points -
AR AK Parts, AR Upper Parts, Gas Blocks, Gun Parts
ERGO AR-15 Low Profile Adjustable Gas Block .750 Black
The Ergo 4822 AR-15 .750 Adjustable Gas Block is designed to fit under the Ergo Modular and SuperLiteâ„¢ Rail System, as well as most other manufacturer’s free float handguards. The…
CompareEarn 49 Points -
AR AK Parts, AR Upper Parts, Custom AR Parts, Custom Engraving, Forward Assist / Dust Covers, Gun Parts, Upper Receivers & Conversion Kits
Yankee Hill YHM Dust Cover AR15 5.56 Marked
YHM has long been a supplier of Caliber Marked upper receivers but we soon asked oursleves What if we want to change the caliber of that upper receiver? For this…
CompareEarn 15 Points -
AR AK Parts, AR Upper Parts, Custom AR Parts, Custom Engraving, Forward Assist / Dust Covers, Gun Parts, Misc Gun Parts
Spike’s Tactical AR15 Ejection Port Door Cover Zombie Killer
Spike’s Tactical is a US based AR manufacturer which creates high quality parts, uppers, and complete rifles. Every component is manufactured to Mil-spec standards and is backed by the Spikes…
CompareEarn 17 Points -
Gun Parts, Misc Upper AR Parts
Magpul MOE AR-15 Rail Section 2″ Five Slots Polymer Black MAG406-BLK
Designed for use with MOE AR-15 Hand Guards and many standard plastic hand guards, the MOE Polymer Rail Sections allow the attachment of various 1913 Picatinny spec rail-mounted accessories such…
CompareEarn 11 Points -
AR AK Parts, AR Upper Parts, Bolts, Carriers & BCG, Gun Parts
BCM AR-15 Extractor Spring Upgrade Kit BCM-EXSPRING-1
The Bravo Company Manufacturing AR-15 Extractor Spring is a heavy coil design made for the increased extractor tension required on many AR-15, M4, M16 short barreled rifles. This product also…
CompareEarn 9 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Gun Parts
Strike Industries AR Forward Assist Assembly Hex Design Steel Gold SI-AR-FA-GC
Strike Industries is committed to providing the shooting community with innovative top quality, field ready firearms parts and accessories. By shooters for shooters, Strike uses real world knowledge and experience…
CompareEarn 23 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Handguards
Luth-AR AR-15 The Palm Handguard 7 Inch Free Float M-LOK Picatinny Top Rail Aluminum Black
Luth-AR has made a new style free float handguard to better fit your hand. This handguard has a triangular shape to fit into your palm for better overall grip and…
CompareEarn 74 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 .22WMR Side Charger Complete Upper 16in MLOK w/BCG
BCA AR-15 .22WMR Side Charger Complete Upper 16in MLOK w/BCG
CompareEarn 299 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Upper Receivers
BCA AR-10 .243 WIN Side Charger Complete Upper w/BCG 24in 416R SS Light-Weight Barrel
This BCA AR-10 complete .243 rifle length upper has a 24″ 416R Stainless Steel Light-weight barrel, and features a 1:8 twist rate, with a rifle length gas system. This upper…
CompareEarn 429 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Misc Upper AR Parts
Wilson Combat Bullet Proof .308 AR Firing Pin, S-7 Tool Steel, TR-AR10FP TRAR10FP
The firing pin of a .308 AR rifle is under intense pressure and factory steel and titanium units are often subject to breakage and excessive tip erosion or wear-especially with…
CompareEarn 29 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-15 .17HMR Side Charging Complete Upper w/BCG, 10rd Mag
BCA BC-15 .17HMR Side Charging Complete Upper w/BCG, 10rd Mag
CompareEarn 299 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA-15 7.62×39 AR-15 Pistol Complete Upper 7.5″ Barrel, 7″ MLOK Side Charger w/BCG
This BCA AR-15 complete 7.62×39 pistol length upper has a 7.5″ heavy barrel with a parkerized finish, and features a 1:10 twist rate, with a pistol length gas system. It…
CompareEarn 329 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
Complete AR-15 Upper Receiver w/BCG .350 Legend, 20″ Parkerized Heavy Barrel, 1:16 Twist, Carbine Length Gas System, 15″ MLOK Rail|Side Charging Upper (Gen 2)|New MLOK
This BCA AR-15 complete 350 Legend rifle length upper has a 20″ heavy barrel with a parkerized finish, and features a 1:16 twist rate, with a carbine length gas system….
CompareEarn 399 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Gun Parts
Timber Creek Outdoors AR-15 Billet Dust Cover Aluminum Flat Dark Earth AR BDC FDE
The Timber Creek Outdoors AR-15 Billet Dust Cover is made out of CNC machined aircraft grade aluminum and avilable in one of nine colors to customize your next AR build….
CompareEarn 32 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Gun Parts
Timber Creek Outdoors AR-15 Forward Assist Red Anodized AR FA R
The Timber Creek Outdoors AR-15 Forward Assist is made out of CNC machined aircraft grade aluminum and available in one of ten colors to customize your next AR build. Details…
CompareEarn 25 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Gun Parts
Timber Creek Outdoors AR-15 Billet Dust Cover Aluminum Red AR BDC R
The Timber Creek Outdoors AR-15 Billet Dust Cover is made out of CNC machined aircraft grade aluminum and avilable in one of nine colors to customize your next AR build….
CompareEarn 25 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Gun Parts
Timber Creek Outdoors AR-15 Forward Assist Black Anodized AR FA BL
The Timber Creek Outdoors AR-15 Forward Assist is made out of CNC machined aircraft grade aluminum and available in one of ten colors to customize your next AR build. Details…
CompareEarn 24 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Gun Parts
Timber Creek Outdoor Inc AR Billet Dust Cover Black Hardcoat Anodized
The Timber Creek AR Billet Dust Cover Is Compatible With Any Mil-Spec Upper Ejection Port And Is Made From Aircraft Grade Aluminum.
CompareEarn 24 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Handguards
Barska Drop-In AR Quad Rail 12″ Length 26 Rail Sections Matte Finish Black AW11772
The No-Gunsmith AR Quad Rail 12″ length by Barska, is a four Picatinny-style rail for flashlights, lasers and/or other accessories. The rail has been designed to dissipate heat from a…
CompareEarn 85 Points -
AR AK Parts, AR Upper Parts, Bolts, Carriers & BCG, Gun Parts
Bootleg Inc. AR-15 Carrier Completion Kit 5.56 NATO Mil Spec Components Phosphate Finish
Bootleg Inc. is a manufacturer that focuses on manufacturing and selling high quality Mil-spec parts for modern sporting rifles. This particular kit is designed to either be a replacement for…
CompareEarn 79 Points -
AR AK Parts, AR Upper Parts, Gas Blocks, Gun Parts
Bushmaster AR-10 .308WIN Gas Block Slant Nose .750
Bushmaster AR-10 .308WIN Gas Block Slant Nose .750
CompareEarn 24 Points