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AR-15 Upper Parts - Bolt Carrier Groups, AR15 Charging Handles, Adjustable Gas Blocks & Other Components — 2,222 products / 6,285 models

Complete your dream build with our selection of premium AR15 parts. We have incredible deals on Radian Raptor charging handles, Riflespeed gas blocks, Geissele handguards, and other high-quality upgrades from top-rated brands. Complete your AR15 upper receiver with the best bolt carrier groups for reliable cycling, ambidextrous charging handles for easy manipulation, and adjustable gas blocks to fine-tune your performance. Make sure to browse all our AR15 parts for sale to find more ways to save on lower parts kits, AR folding stocks, AR 15 barrels, and other top-notch components.image

What Parts Are in an AR-15 Upper?

What Should I Look for in an AR-15 Upper?

Your AR-15 upper receiver holds and protects many of the essential components of your AR-15 rifle. You can choose between an upper receiver that will be either "flat-top" or "carry handle." A flat-top has a Picatinny rail on the top of the upper. Carry handle uppers feature a fixed "carry handle" on the top of the upper.

Shop AR-15 Complete Upper Parts & Kits at OpticsPlanet!

OpticsPlanet.com is your top online destination for gun parts and tactical, hunting, and outdoor gear. We work hard to provide more than an incredible product and super low prices. We know that a lot of the equipment in our store demands a certain amount of know-how to review and understand properly. That's why we've written up many How-To Guides to help you find the best AR15 parts and upgrades for your platform. In addition, we employ product experts right here in our offices to answer all your questions and provide you with purchasing suggestions. Whenever you need great AR15 Upper Parts, it's a no-brainer to come to OpticsPlanet first. We have the options you need on AR15 Upper Parts at great prices and the assistance you require! Don't Forget FREE SHIPPING on most orders over $49!

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Image of AR 15 Tactical Rails category AR 15 Tactical Rails
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Featured Products

Image of Faxon Firearms 5.56/300BLK Gunner Light Weight Bolt Carrier Group Faxon Firearms 5.56/300BLK Gunner Light Weight Bolt Carrier Group (17) List: $249.00 (Save 17%) $207.00 Blazin' Deal
Image of Midwest Industries AR-15/M16 SLH Free Float Slim Line Handguard made-in-usa-flag 6 models Midwest Industries AR-15/M16 SLH Free Float Slim Line Handguard (42) As Low As (Save Up to $11.00) $157.95 Free 2 Day Shipping
Image of Stern Defense SD 16.1in MOD4 MLOK .40SW Upper Receiver Assembly Stern Defense SD 16.1in MOD4 MLOK .40SW Upper Receiver Assembly List: $614.12 (Save $14.12) $600.00
Image of Strike Industries Billet Ultimate Dust Cover 5 models Strike Industries Billet Ultimate Dust Cover (77) As Low As (Save Up to 24%) $27.19 Blazin' Deal
Image of Timber Creek Enforcer 9in M-Lok Handguard 10 models Timber Creek Enforcer 9in M-Lok Handguard List: $339.99 (Save 20%) $271.99
Image of Next Level Armament NLA AR -15 M-Lok Handguard 6 models Next Level Armament NLA AR -15 M-Lok Handguard (2) As Low As (Save Up to $10.00) $108.00
Image of RISE Armament RA-212 Extended Latch Charging Handle made-in-usa-flag 5 models RISE Armament RA-212 Extended Latch Charging Handle (40) As Low As (Save Up to 31%) $34.36 Blazin' Deal

2,222 Products in AR15 Upper Parts

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Image of Superlative Arms Adjustable Bleed Off Gas Block 18 models Superlative Arms Adjustable Bleed Off Gas Block (254) List: $99.99 (Save 10%) $89.99 12% Coupon
Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle made-in-usa-flag 5 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (526) As Low As (Save Up to 12%) $43.99 12% Coupon
Image of VISM AR15 M-LOK Carbine Handguard VISM AR15 M-LOK Carbine Handguard (344) List: $79.99 (Save 15%) $67.99 Best Rated
Image of UTG Pro AR15 Super Slim M-LOK 15in Drop-In Handguard UTG Pro AR15 Super Slim M-LOK 15in Drop-In Handguard (249) List: $124.97 (Save $10.00) $114.97 Best Rated
Image of Radian Weapons Raptor SD Ambidextrous Charging Handle made-in-usa-flag 5 models Radian Weapons Raptor SD Ambidextrous Charging Handle (203) As Low As (Save Up to 16%) $134.95 Best Rated
Image of Radian Weapons Raptor LT Ambidextrous Charging Handle made-in-usa-flag 4 models Radian Weapons Raptor LT Ambidextrous Charging Handle (349) As Low As (Save Up to 20%) $79.95 Best Rated
Image of Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG) Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG) (75) List: $174.95 (Save $15.00) $159.95 Best Rated
Image of Bootleg Inc AR-15 Four Position Adjustable Carrier Bootleg Inc AR-15 Four Position Adjustable Carrier (65) List: $209.95 (Save $10.00) $199.95 Best Rated
Image of Geissele Super Charging Handle made-in-usa-flag 4 models Geissele Super Charging Handle (209) As Low As (Save Up to 21%) $106.49 On Sale
Image of Breek Arms Sledgehammer AR-15 Ambidextrous Charging Handle made-in-usa-flag 5 models Breek Arms Sledgehammer AR-15 Ambidextrous Charging Handle (112) List: $79.99 (Save 13%) $69.99 Best Rated
Image of Sons of Liberty Gun Works SOLGW 5.56mm/.300 AAC Blackout Bolt Carrier Group Sons of Liberty Gun Works SOLGW 5.56mm/.300 AAC Blackout Bolt Carrier Group (32) List: $199.00 (Save 10%) $179.00 Best Rated
Image of WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished (31) List: $164.00 (Save $5.51) $158.49 Best Rated
Image of Breek Arms AR-15 Warhammer Mod2 Micro Ambidextrous Charging Handle made-in-usa-flag 4 models Breek Arms AR-15 Warhammer Mod2 Micro Ambidextrous Charging Handle (154) List: $54.95 (Save $5.00) $49.95 Best Rated
Image of Daniel Defense Bolt Carrier Group (BCG) Complete 5.56mm NATO 2 models Daniel Defense Bolt Carrier Group (BCG) Complete 5.56mm NATO (38) List: $245.00 (Save $17.00) $228.00 Best Rated
Image of Superlative Arms Gas Block .750 in Solid Set Screw 4 models Superlative Arms Gas Block .750 in Solid Set Screw (47) List: $99.99 (Save 10%) $89.99 Best Rated
Image of Griffin Armament SN-ACH 15 Gen 2 Charging Handle 2 models Griffin Armament SN-ACH 15 Gen 2 Charging Handle (9) List: $99.00 (Save $4.05) $94.95 Best Rated
Image of Radian Weapons Raptor SD-SL Charging Handle made-in-usa-flag Radian Weapons Raptor SD-SL Charging Handle (36) List: $163.05 (Save 18%) $134.00 Best Rated
Image of TRYBE Defense Mil-Spec Nickel Boron Coated Cam Pin made-in-usa-flag TRYBE Defense Mil-Spec Nickel Boron Coated Cam Pin (14) List: $10.49 (Save 50%) $5.24 Blazin' Deal
Image of Radian Weapons Raptor Ambidextrous Charging Handle made-in-usa-flag 6 models Radian Weapons Raptor Ambidextrous Charging Handle (454) As Low As (Save Up to 11%) $104.95 Best Rated
Image of Breek Arms Warhammer Mod2 AR-10 / LR308 Ambidextrous Charging Handle made-in-usa-flag 5 models Breek Arms Warhammer Mod2 AR-10 / LR308 Ambidextrous Charging Handle (104) As Low As (Save Up to 25%) $55.99 Best Rated
Image of Bravo Company MFG Bolt Carrier Group (MPI) - Auto 3 models Bravo Company MFG Bolt Carrier Group (MPI) - Auto (61) As Low As (Save Up to $20.05) $215.99 Blazin' Deal
Image of Faxon Firearms Adjustable 3 Screw Low Profile Gas Block 2 models Faxon Firearms Adjustable 3 Screw Low Profile Gas Block (13) List: $89.00 (Save 17%) $73.80 Blazin' Deal
Image of TRYBE Defense AR-15 Mil-Spec 5.56 NATO/.223 Rem/.300 Blackout Complete Bolt Assembly made-in-usa-flag 2 models TRYBE Defense AR-15 Mil-Spec 5.56 NATO/.223 Rem/.300 Blackout Complete Bolt Assembly (25) As Low As (Save Up to 45%) $40.44 Blazin' Deal
Image of Midwest Industries SP Series AR-15 M-LOK Handguard made-in-usa-flag 6 models Midwest Industries SP Series AR-15 M-LOK Handguard (117) As Low As (Save Up to $11.00) $157.95 Best Rated
Image of Geissele Airborne Charging Handle made-in-usa-flag 2 models Geissele Airborne Charging Handle (56) As Low As $109.79 Best Rated
Image of TRYBE Defense LR-308 DPMS .308 Complete Bolt Carrier Group (BCG) 2 models TRYBE Defense LR-308 DPMS .308 Complete Bolt Carrier Group (BCG) (74) As Low As (Save Up to 35%) $129.99 Blazin' Deal
Image of Faxon Firearms 5.56/300BLK M16 Bolt Carrier Group Faxon Firearms 5.56/300BLK M16 Bolt Carrier Group (23) List: $145.00 (Save 17%) $120.60 Blazin' Deal
Image of Spikes Tactical Melonited Gas Tube made-in-usa-flag 4 models Spikes Tactical Melonited Gas Tube (101) As Low As (Save Up to 27%) $14.40 Best Rated
Image of HK 51000384 UPPER RECEIVER KIT MR556A4 16.5" HK 51000384 UPPER RECEIVER KIT MR556A4 16.5" List: $2,499.00 (Save 13%) $2,179.00
Image of RISE Armament AR-15 Bolt Carrier Group (BCG) made-in-usa-flag 2 models RISE Armament AR-15 Bolt Carrier Group (BCG) (35) As Low As (Save $10.00) $169.99 Free 2 Day Shipping
Image of JP Enterprises Complete JPBC Bolt Carrier Group (BCG) 5 models JP Enterprises Complete JPBC Bolt Carrier Group (BCG) (25) As Low As (Save Up to $25.25) $460.75 10% Bonus Bucks
Image of TRYBE Defense AR-15 Magnite Ultra Function Lightweight M-LOK Handguard w/ Full Top Rail made-in-usa-flag 9 models TRYBE Defense AR-15 Magnite Ultra Function Lightweight M-LOK Handguard w/ Full Top Rail (44) As Low As (Save Up to 72%) $39.99 Blazin' Deal
Image of Faxon Gen 2 9mm PCC Blowback Full-Mass Bolt Carrier Group, Glock/Colt Compatible Faxon Gen 2 9mm PCC Blowback Full-Mass Bolt Carrier Group, Glock/Colt Compatible (48) List: $165.00 (Save 17%) $136.80 Blazin' Deal
Image of Geissele Reliability Enhancement Kit H2 AR-15 5.56mm Bolt Carrier Group Geissele Reliability Enhancement Kit H2 AR-15 5.56mm Bolt Carrier Group (1) List: $479.17 (Save $30.17) $449.00
Image of UTG Pro AR15 Carbine Length Drop-in Quad Rail 2 models UTG Pro AR15 Carbine Length Drop-in Quad Rail (154) As Low As (Save Up to 23%) $53.99 Best Rated
Image of TRYBE Defense AR-15 Magnite Go Fast Ultra Lightweight M-LOK Handguard w/ Cut Top Rail made-in-usa-flag 8 models TRYBE Defense AR-15 Magnite Go Fast Ultra Lightweight M-LOK Handguard w/ Cut Top Rail (43) As Low As (Save Up to 73%) $43.59 Blazin' Deal
Image of Geissele Super Charging Handle Mcx made-in-usa-flag Geissele Super Charging Handle Mcx (4) List: $140.00 (Save 12%) $122.79
Image of Lantac Enhanced Full Auto Style Bolt Carrier Group (BCG) w/ NiB Coating 2 models Lantac Enhanced Full Auto Style Bolt Carrier Group (BCG) w/ NiB Coating (51) As Low As (Save 10%) $261.99 Free 2 Day Shipping
Image of Riflespeed Gas Control .750in Assembly Block 11 models Riflespeed Gas Control .750in Assembly Block (19) As Low As (Save Up to 13%) $199.99 Free 2 Day Shipping
Image of Q The FIX AR-15 M-LOK Handguard 3 models Q The FIX AR-15 M-LOK Handguard (3) As Low As (Save Up to $19.51) $330.49 Blazin' Deal
Image of TRYBE Defense Mil-Spec AR-15 .223/5.56/.300 AAC Complete Bolt Carrier Group (BCG) BCG made-in-usa-flag 4 models TRYBE Defense Mil-Spec AR-15 .223/5.56/.300 AAC Complete Bolt Carrier Group (BCG) BCG (83) As Low As (Save Up to 42%) $104.99 Blazin' Deal
Image of Geissele Reliability Enhancement Kit H3 AR-15 5.56mm Bolt Carrier Group Geissele Reliability Enhancement Kit H3 AR-15 5.56mm Bolt Carrier Group (2) List: $508.58 (Save $44.58) $464.00
Image of Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete 8 models Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete (56) As Low As (Save Up to $14.00) $123.50 10% Coupon
Image of JP Enterprises Enhanced Bolt Assembly Group 3 models JP Enterprises Enhanced Bolt Assembly Group (48) As Low As (Save Up to $10.15) $137.70 10% Bonus Bucks
Image of Presma Ambidextrous Charging Handle 223/5.56 5 models Presma Ambidextrous Charging Handle 223/5.56 (130) List: $33.99 (Save Up to 17%) $29.99 Best Rated
Image of JP Enterprises Complete JPBC Bolt Carrier Group (BCG) .223 Caliber 4 models JP Enterprises Complete JPBC Bolt Carrier Group (BCG) .223 Caliber (13) As Low As (Save Up to $24.25) $356.25 10% Bonus Bucks
Image of Faxon Firearms .308 9310 Bolt Carrier Complete Faxon Firearms .308 9310 Bolt Carrier Complete (30) List: $219.00 (Save 17%) $181.80 Blazin' Deal
Image of JP Enterprises High Pressure Enhanced Bolt Assembly Group JP Enterprises High Pressure Enhanced Bolt Assembly Group (11) List: $228.95 (Save $11.45) $217.50 10% Bonus Bucks
Image of JP Enterprises .750 Adjustable Gas System And A2-Type Clamp-On Sight JP Enterprises .750 Adjustable Gas System And A2-Type Clamp-On Sight (22) List: $149.95 (Save $7.50) $142.45 Best Rated
Image of TRYBE Defense AR-15 Gas Block, .750 Mil-Spec, Low Profile Steel TRYBE Defense AR-15 Gas Block, .750 Mil-Spec, Low Profile Steel (29) $17.99
Image of Seekins Precision Low Profile Adjustable Gas Block Seekins Precision Low Profile Adjustable Gas Block (72) List: $69.00 (Save $3.00) $66.00 Best Rated
Image of JP Enterprises Stainless Full Mass Tactical Carrier JP Enterprises Stainless Full Mass Tactical Carrier (9) List: $395.00 (Save $19.75) $375.25 Free 2 Day Shipping
Image of Geissele Super Gas Stainless Steel Block w/SS Dowel Pin Geissele Super Gas Stainless Steel Block w/SS Dowel Pin (9) List: $84.00 (Save $1.21) $82.79 12% Coupon
Image of Geissele Mk4 M-Lok Super Modular Rail made-in-usa-flag 11 models Geissele Mk4 M-Lok Super Modular Rail (12) As Low As (Save Up to 25%) $204.89 Free 2 Day Shipping
Image of Radian Weapons Enhanced Black Nitride Bolt Carrier Group (BCG) made-in-usa-flag Radian Weapons Enhanced Black Nitride Bolt Carrier Group (BCG) (38) List: $263.23 (Save 20%) $209.95 Best Rated
Image of JP Enterprises Bolt Carrier for Large Frame 4 models JP Enterprises Bolt Carrier for Large Frame (13) As Low As (Save Up to $24.25) $280.25 10% Bonus Bucks
Image of JP Enterprises Low Mass 6.5 Grendel Bolt Carrier Group (BCG) 2 models JP Enterprises Low Mass 6.5 Grendel Bolt Carrier Group (BCG) (4) List: $395.00 (Save $19.75) $375.25 10% Bonus Bucks
Image of Geissele Mk16 M-Lok Super Modular Rail made-in-usa-flag 8 models Geissele Mk16 M-Lok Super Modular Rail (5) As Low As (Save Up to 27%) $269.99 12% Coupon
Image of Radian Weapons Combo Raptor Charging Handle with Talon Safety made-in-usa-flag 4 models Radian Weapons Combo Raptor Charging Handle with Talon Safety (28) As Low As (Save Up to 17%) $144.95 Best Rated
Image of Faxon Firearms 6.5 Grendel Type 2 .136 9310 Bolt Carrier Complete Faxon Firearms 6.5 Grendel Type 2 .136 9310 Bolt Carrier Complete (15) List: $165.00 (Save 17%) $136.80 Blazin' Deal
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AR15 Upper Parts How To Guides View All

Best AR-15 Handguards of 2026 on OpticsPlanet by OpticsPlanet Product Expert
How to Select an AR Charging Handle by Ethan L
Fixed vs Adjustable Gas Blocks by Hunter D.
How To Build An AR15 Upper Receiver by OpticsPlanet Guest Expert

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