Upper Receiver Parts & Kits for Sale | AR-15 Upper Receiver Assembly — Mid State Firearms - Page 2

Showing 49–96 of 380 results

3FO-S Flash Hider Short Outside Threaded – .223/5.56
Thread Pitch: 1/2x28
$34.99 View Product
-68%

4 pack of 3” 9mm ar15 ar9 barrels
Original price was: $399.00.Current price is: $129.00. View Product
-68%

4 pack of 5” 9mm ar15 ar9 barrels
Caliber: 9mm

Rated 5.00 out of 5 based on 2 customer ratings
(2)
Original price was: $399.00.Current price is: $129.00. View Product
-59%

5″ 9mm Ar15 Pistol Barrel, 5/8-24 Nitride
Barrel Size: 5"
Caliber: 9mm

Rated 4.00 out of 5 based on 4 customer ratings
(4)
Original price was: $119.00.Current price is: $49.00. View Product
-17%

6.5 Creedmoor 20” stainless fluted barrel
Original price was: $299.00.Current price is: $249.00. View Product
Aluminum 2 piece drop in mlok rail with picatinny top, carbine
$99.00 View Product
-34%

Ar15 / M16 / M4 DLC MPI Bolt Assembly
Original price was: $89.00.Current price is: $59.00. View Product
-66%

Ar15 / M16 / M4 DLC Stripped MPI Bolt

Rated 5.00 out of 5 based on 5 customer ratings
(5)
Original price was: $59.00.Current price is: $19.99. View Product
Ar15 / m16 Gas Key and OCKS gas key screws combo – reliability upgrade kit

Rated 5.00 out of 5 based on 2 customer ratings
(2)
$14.99 View Product
-18%
New!

Ar15 Left Handed Builder Bundle – Slick Side Receiver and Nitride BCG Combo
Original price was: $279.99.Current price is: $229.99. View Product
-11%
New!

Ar15 LeftY Builder Bundle – Billet Receiver and NiCkel Boron BCG Combo
Original price was: $279.99.Current price is: $249.99. View Product
-42%

ARCA MLOK Rail Mount Plate, Bipod Tripod Dovetail Adapter, M-Lok slots
Original price was: $119.00.Current price is: $69.00. View Product
-9%

Arisaka Finger STop FS-M For MLOK Handguards
Original price was: $33.00.Current price is: $29.99. View Product
-9%

Arisaka Indexer IDX-M For MLOK Handguards
Original price was: $33.00.Current price is: $29.99. View Product
Black Micro WARHAMMER Mod2 AR-15 Charging Handle – Breek Arms
View Product
-37%

Blem 5″ Ar9 Threaded Ar15 Pistol MLok Upper
Rail Length: 4"
Caliber: 9mm

Rated 4.33 out of 5 based on 3 customer ratings
(3)
Original price was: $249.00.Current price is: $157.00. View Product
-39%

Bolt Only – Microbest m16 Full Chrome HPT / MPI Bolt Face Assembly, Sprinco
Caliber: 5.56/.223, 300 BLK

Rated 5.00 out of 5 based on 1 customer rating
(1)
Original price was: $129.00.Current price is: $79.00. View Product
-39%

Bolt Only – Microbest m16 Full Chrome HPT / MPI Bolt Face Assembly, Sprinco, blem
Caliber: 5.56/.223, 300 BLK
Original price was: $129.00.Current price is: $79.00. View Product
Breek Arms 2BO-S Short Ar15 Muzzle Brake Single Port
Thread Pitch: 1/2x28, 5/8x24
Caliber: .308, 5.56/.223, 9mm
$34.99 View Product
Breek Arms 3FO Ar15 Flash Hider v2 3 Prong
Thread Pitch: 1/2x28, 5/8x24
Caliber: .308, 5.56/.223, 9mm
$34.99 View Product
Breek Arms 3FO-S Ar15 Flash Hider Short
Thread Pitch: 1/2x28, 1/2x36, 5/8x24
Caliber: .308, 5.56/.223, 9mm
$34.99 View Product
Breek Arms BFO Ar15 Flash Hider Cage Style, Caged 3prong
Thread Pitch: 1/2x28, 5/8x24
Caliber: .308, 5.56/.223, 9mm
$34.99 View Product
Breek Arms CASTLE BLAST SHIELD Concussion Device

Rated 5.00 out of 5 based on 1 customer rating
(1)
$32.99 View Product
Breek Arms SLEDGEHAMMER Gas Blocking Ar15 Charging Handle – Black
$79.99 View Product
Breek Arms SLEDGEHAMMER Gas Blocking Ar15 Charging Handle – FDE
$79.99 View Product
Breek Arms SLEDGEHAMMER Gas Blocking Ar15 Charging Handle – Grey
$79.99 View Product
-10%

Breek Arms WARHAMMER Ambidextrous Ar15 Charging Handle – Black

Rated 4.00 out of 5 based on 4 customer ratings
(4)
Original price was: $49.99.Current price is: $45.00. View Product
-10%

Breek Arms WARHAMMER Ambidextrous AR15 Charging Handle – FDE / Tan

Rated 5.00 out of 5 based on 2 customer ratings
(2)
Original price was: $49.99.Current price is: $45.00. View Product
-10%

Breek Arms WARHAMMER Ambidextrous AR15 Charging Handle – Gray

Rated 5.00 out of 5 based on 1 customer rating
(1)
Original price was: $49.99.Current price is: $45.00. View Product
-10%

Breek Arms WARHAMMER Ambidextrous AR15 Charging Handle – OD Green
Original price was: $49.99.Current price is: $45.00. View Product
-25%

Combo deal! Criterion 13.9” Core Chrome lined Ar15 barrel and Microbest Full Chrome M16 BCG

Rated 5.00 out of 5 based on 2 customer ratings
(2)
Original price was: $529.00.Current price is: $399.00. View Product
Dead Air KeyMo Muzzle Brake 1/2-28 223 / 556 Ar15
Thread Pitch: 1/2x28
$89.00 View Product
-26%

Double Upper Combo! 5.56/.223 & .300 Blackout

Rated 4.00 out of 5 based on 1 customer rating
(1)
Original price was: $799.99.Current price is: $589.99. View Product
-33%

Grab Bag / Clearance / Blem Ar15 PISTOL Upper w/ Free Float Handguard
Barrel Size: 7.5"
Caliber: 5.56/.223

Rated 4.89 out of 5 based on 18 customer ratings
(18)
Original price was: $299.00.Current price is: $199.00. View Product
-33%
New!

300 Blackout Grab Bag / Blem Ar15 RIFLE Upper w/ Free Float Handguard
Barrel Size: 16"
Caliber: 300 BLK
Original price was: $299.00.Current price is: $199.00. View Product
-33%

Grab Bag / Clearance / Blem Ar15 RIFLE Upper w/ Free Float Handguard
Caliber: 5.56/.223
Barrel Size: 16"

Rated 4.85 out of 5 based on 60 customer ratings
(60)
Original price was: $299.00.Current price is: $199.00. View Product
-33%

Grab Bag/Clearance AR15 9MM Pistol Upper Receiver Assembly
Caliber: 9mm
Barrel Size: 3", 5", 7", 7.5", 8.5", 10", 10.5"

Rated 4.67 out of 5 based on 3 customer ratings
(3)
Original price was: $299.00.Current price is: $199.00. View Product
Gray Micro WARHAMMER Mod2 AR-15 Charging Handle – Breek Arms
View Product
Hawk Tuah! Engraved meme ar15 dust cover

Rated 5.00 out of 5 based on 1 customer rating
(1)
$9.99 View Product
HBAR Laser Engraving / Laser Engrave HBAR on barrel
$1.00 View Product
-5%

Magpul® Enhanced Ejection Port Dust Cover – FDE / Tan
Original price was: $14.95.Current price is: $14.20. View Product
-34%

Microbest Full Chrome M16 Bolt Carrier only

Rated 5.00 out of 5 based on 2 customer ratings
(2)
Original price was: $119.00.Current price is: $79.00. View Product
-17%

Microbest m16 Full Chrome HPT / MPI Bolt Carrier Group BCG, Sprinco, OCKS,
Caliber: 5.56/.223, 300 BLK
Original price was: $179.00.Current price is: $149.00. View Product
-25%

Microbest m16 Full Chrome HPT / MPI Bolt Carrier Group BCG, Sprinco, OCKS, oring
Caliber: 5.56/.223, 300 BLK
Original price was: $199.00.Current price is: $149.00. View Product
-17%

Microbest m16 Full Chrome HPT / MPI Bolt Carrier Group BCG, Sprinco, oring
Caliber: 5.56/.223, 300 BLK

Rated 5.00 out of 5 based on 4 customer ratings
(4)
Original price was: $179.00.Current price is: $149.00. View Product
Microbest MPI Phosphate Bolt Face Assembly c158
$69.99 View Product
-50%

MSF 13.9″ 5.56 / 223 GOV PROFILE MIDLENGTH Nitride AR 15 BARREL
Barrel Size: 24"
Caliber: 5.56/.223

Rated 5.00 out of 5 based on 1 customer rating
(1)
Original price was: $199.00.Current price is: $99.00. View Product
-50%

MSF 13.9” 223 Wylde 1/7 Ar15 Barrel – 4150 CrMoV Nitride
Barrel Size: 13.9"
Caliber: 5.56/.223
Original price was: $199.00.Current price is: $99.00. View Product

Showing 49–96 of 380 results