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
6 products -
AR Bolt Catch
13 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
9 products -
AR Takedown Pins
13 products -
AR Upper Parts Kit
5 products -
AR/AK Barrels
11 products -
Barrel Thread Protectors
5 products -
Bolts, Carriers & BCG
13 products -
Charging Handles
10 products -
Complete Uppers
43 products -
Forward Assist / Dust Covers
38 products -
Gas Blocks
13 products -
Gas Tubes
11 products -
Handguards
30 products -
Misc Upper AR Parts
1 product -
Muzzle Devices
19 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…
- 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…
- 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.
- 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….
- 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.
- 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 SuperLite™ Rail System, as well as most other manufacturer’s free float handguards. The…
- 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…
- 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…
- 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
- 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…
- 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…
- AR AK Parts, AR Upper Parts, Gun Parts, Muzzle Devices
Uzi 9MM Flash Hider
Uzi 9MM Flash Hider
- 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…
- 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…
- 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…
- AR AK Parts, AR Bolt Gas Rings, AR Upper Parts, Gun Parts
Luth-AR LR308/SR25 Helical 1 Piece Bolt Gas Ring
Luth-AR has replacement LR308/SR25 Bolt Gas Ring. Keep one for your next big clean up on your AR or in your range bag or storage compartment just in case something…
- 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.
- 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…
- AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun Parts
BCA AR-15 6.5 Grendel Complete Upper w/BCG 18in Stainless Heavy Barrel 1:8 Twist
BCA AR-15 6.5 Grendel Complete Upper w/BCG 18in Stainless Heavy Barrel 1:8 Twist
- AR AK Parts, AR Carry Handles, AR Upper Parts, Gun Parts
AR-15 A2 Style Carry Handle with Windage
AR-15 A2 Style Carry Handle with Windage
- AR AK Parts, AR Upper Parts, Gun Parts, Stripped Upper Receivers
Davidson Defense “Ghoul” DPMS Style LR-308 High Profile Stripped Upper Receiver
The Davidson Defense “Ghoul” DPMS Style Upper Receiver is the standard in .308 uppers. This is the latest DPMS 1st Gen upper design. This upper will work with almost every…
- AR AK Parts, AR Upper Parts, Gun Parts, Stripped Upper Receivers
Davidson Defense “Ghoul” DPMS Style LR-308 Low Profile Stripped Upper Receiver
Davidson Defense “Ghoul” DPMS Style LR-308 Low Profile Stripped Upper Receiver
- AR AK Parts, AR Upper Parts, Gas Blocks, Gun Parts
Aero Precision Low Profile Gas Block 0.875
The low-profile design of this gas block allows it to fit under a wide variety of handguards, making it a versatile choice for different AR15 builds or upgrades. It attaches…
- AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun Parts
BCA AR-15 .22 Magnum (WMR) 20in Complete Upper w/BCG, Buffer, Spring
BC-22 | .22 Magnum (WMR) Branded Right Side Charging Upper | 20″ Black Nitride Heavy Barrel | 1:16 Twist | Blowback Gas System | 15″ MLOK