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. We are here to help with options, sizes, colors and more.
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. When you shop with Click-Click-Boom, you can do so with confidence. Check out our upper receiver parts for sale and invest today!
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AR Barrel Nuts
4 products -
AR Barrel Shims
1 product -
AR BCG Repair Parts
3 products -
AR Bolt Catch
12 products -
AR Bolt Gas Rings
4 products -
AR Carry Handles
1 product -
AR Castle Nuts
3 products -
AR Crush Washers
10 products -
AR Delta Rings
4 products -
AR End Plates
5 products -
AR Firing Pins
7 products -
AR Takedown Pins
13 products -
AR Upper Parts Kit
7 products -
AR/AK Barrels
11 products -
Barrel Thread Protectors
5 products -
Bolts, Carriers & BCG
11 products -
Charging Handles
12 products -
Complete Uppers
38 products -
Forward Assist / Dust Covers
39 products -
Gas Blocks
12 products -
Gas Tubes
10 products -
Handguards
33 products -
Muzzle Devices
21 products -
Stripped Upper Receivers
5 products -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, Gun Parts
Spike’s Tactical AR-15 Ejection Port Door Cover Crusader Steel Black SED7018
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…
Earn 17 Points -
AR BCG Repair Parts
Sprinco USA AR-10 .308 Dual Extractor CS Spring Uprade Kit
Sprinco’s Extractor Springs are made of chrome silicon wirestock that has been heat treated, stress relieved, and cryogenic processing post winding. The springs are also plated with re-micronized molybdenum disulfide…
Earn 12 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Stripped 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.
Earn 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…
Earn 49 Points -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, Gun Parts
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…
Earn 15 Points -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, 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…
Earn 17 Points -
AR AK Parts, AR Lower Parts, AR Takedown Pins, AR Takedown Pins, AR Upper Parts, Gun Parts
Tacfire Lower Take Down Pin Set for AR-10 Rifle, Black
TacFire’s AR10 lower takedown pin set is constructed of steel with a black finish.
Earn 12 Points -
AR AK Parts, AR Lower Parts, AR Takedown Pins, AR Takedown Pins, AR Upper Parts, Gun Parts
AR-15 Front and Rear Take Down Pin w/ Quick Pull Ring
For new gun owners, these pins are essential components that facilitate the disassembly and reassembly of the AR15. They play a crucial role in routine cleaning, maintenance, and customization tasks….
Earn 14 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun Parts
BCA-15 .300 Blackout 16″ Stainless Black Nitride Fluted Heavy Barrel Complete Upper w/BCG Side Charger
This BCA AR-15 complete 300 Blackout rifle length upper has a 16″ bear claw fluted heavy barrel with a 416R stainless steel with black nitride finish, and features a 1:8…
Earn 399 Points -
AR AK Parts, AR Upper Parts, Gun Parts, Muzzle Devices
Uzi 9MM Flash Hider
Uzi 9MM Flash Hider
Earn 29 Points -
AR AK Parts, AR Lower Parts, AR Takedown Pins, AR Takedown Pins, AR Upper Parts, Gun Parts
Timber Creek Outdoors AR-15 Takedown Pin Set Flat Dark Earth AR TPS FDE
Tired of the pain taking down an AR-15 platform is? Well Struggle no more with the Timber Creek Takedown Pin Set. These pins are precision CNC machined to exact tolerances…
Earn 19 Points -
AR AK Parts, AR Upper Parts, Forward Assist / Dust Covers, Forward Assists, 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…
Earn 23 Points -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, Gun Parts
YHM AR-15 Caliber Marked Dust Cover .300 Black
Here’s a great idea for the AR-15 owner who uses multiple uppers on the same lower receiver or identically configured rifles in different calibers. Just add a caliber-marked dust cover…
Earn 15 Points -
AR AK Parts, AR Crush Washers, AR Upper Parts, Gun Parts
JE Machine Tech Crush Washer 5/8″ 308/7.62 Caliber Steel Silver
Let JE Machine Tech provide you with the next crush washer you need, from a new build to just an upgrade.
Earn 4 Points -
AR AK Parts, AR Upper Parts, AR-15 Handguards, 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…
Earn 74 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun Parts
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…
Earn 429 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun Parts
BCA AR-10 6.5 Creedmoor Side Charging Handle 22in 416R SS w/BCG Complete Upper
BCA 6.5CR 22″ SL RSC CUPPER
Earn 339 Points -
AR AK Parts, AR Firing Pins, AR Upper Parts, Gun Parts
CMMG Firing Pin Spring 22 ARC
The CMMG Firing Pin Spring is a high-quality spring designed to provide consistent and reliable ignition, ensuring your firearm fires every time you pull the trigger. The spring is made…
Earn 6 Points -
AR AK Parts, AR Lower Parts, AR Takedown Pins, AR Takedown Pins, AR Upper Parts, Gun Parts
AR-15 AR-10 Detent and Spring for Take Down Pins
AR-15 AR-10 Detent and Spring for Take Down Pins
Earn 2 Points -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, Gun Parts
DPMS AR-10 Dust Cover Assembly w/Hardware Punisher Skulls Pattern Engraved
DPMS AR-10 Dust Cover Assembly w/Hardware Punisher Skulls Pattern Engraved
Earn 16 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun Parts
BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK
BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK
Earn 379 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, 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…
Earn 329 Points -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, Gun Parts
LUTH-AR We The People AR-15 Dust Cover Ejection Port Kit Double Sided
The LUTH-AR We The People AR-15 Dust Cover kit is a complete ejection port dust cover replacement for your AR-15 build. This LUTH-AR dust cover kit has “We The People”…
Earn 14 Points -
AR AK Parts, AR Upper Parts, Dust Covers, Ejection Port Covers, Forward Assist / Dust Covers, Gun Parts
LUTH-AR LET IT RAIN AR-15 Dust Cover Ejection Port Kit Double Sided
LET IT RAIN AR-15 Dust Cover kit is made by Luth-AR and is high quality. This kit is a complete ejection port dust cover replacement for your AR-15 build. Fit’s…
Earn 14 Points