+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Heckler & Koch MR556-A1 Complete Upper Receiver Kit 235975-A5

Heckler & Koch MR556-A1 Complete Upper Receiver Kit 5.56mm/.223 Remington With 16.5 Inch Barrel
Heckler & Koch MR556-A1 Complete Upper Receiver Kit 5.56mm/.223 Remington With 16.5 Inch Barrel
1 of 1 images
Heckler & Koch MR556-A1 Complete Upper Receiver Kit 5.56mm/.223 Remington With 16.5 Inch Barrel

Tap Tap to Zoom

Questions & Answers
Is this compatible with a full auto BCG? I’ve heard this was somehow not compatible with a FA BCG.

the bcg is not m16 cut is just off by a little and you can't install a 416 carrier because the the barrel extension has a tab protruding that will prevent it from closing. so it's semi auto all the way.

by Gerry, Verified Owner, January 21, 2021
See 1 More Answer
is this compatible with my truglo red dot? Expert Answer

If your red dot has a picatinny mount then this will be compatible.

by Nick B., Gear Expert, November 16, 2021
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review Everything I expected and more by Chris Goebel, Verified Owner, October 7, 2020
High quality upper kit... obviously. Comes with a buffer and buffer spring, soft case, manual, and m-lok hand guard with QD mounts. I ordered the traditional HK quad rail for this. Shoots very well on an aero lower. I am going to build a BRN4 lower ...
Read More...
1/2 found this helpful
Read 1 Review

Product Discontinued by Manufacturer

Heckler & Koch MR556-A1 Complete Upper Receiver Kit has been discontinued by Heckler & Koch and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

ATTENTION! Due to the configuration of products on this page, we are not able to support sales of these items to AK, CA, HI, IL, NY, WA, P.O. Boxes, and U.S. Territories.

Product Info for Heckler & Koch MR556-A1 Complete Upper Receiver Kit

Includes MR556A1 upper receiver/barrel assembly with 16.5 inch cold-hammer forged barrel, free floating rail system handguard, complete bolt carrier assembly, HK proprietary buffer, recoil spring and is designed to be fully interchangeable with most high quality AR-style firearms. Designed to function with 5.56x45mm ammunition and also cycles most quality .223 Remington ammunition. NOTE: This kit does not work with fixed stock AR-15 rifles.image

Specifications for Heckler & Koch MR556-A1 Complete Upper Receiver Kit:

Mfg Item Num:  235975-A5
Type:  UPPER_RECEIVERS
Barrel Length:  16.5
AR-15 Parts:  AR-15 Parts
Caliber:  5.56mm/.223
Tactica:  Tactical
Finish:  Black
Caliber-Gauge:  .223 REM.
Master Model Header:  MR556-A1 Upper Receiver Kit

Package Contents:

  • Heckler & Koch MR556-A1 Complete Upper Receiver Kit

Ammunition

1–53 / 53
Previous
8% Coupon
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
2 models
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
(101)
As Low As (Save Up to 26%)
$11.29
$0.52 - $0.56/Round
See all 2 models
SinterFire Reduced Hazard .223 Rem 55 Grain Frangible Brass Cased Pistol Ammo, 50 Rounds, 855040006600
SinterFire Reduced Hazard .223 Rem 55 Grain Frangible Brass Cased Pistol Ammo, 50 Rounds, 855040006600
(2)
List: $57.99 (Save 39%)
$35.29
$0.71/Round
Blazin' Deal
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
4 models
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(39)
As Low As (Save Up to 34%)
$10.39
$0.52 - $0.64/Round
See all 4 models
Armscor Precision Inc .223 Remington/5.56x45mm NATO Blank Brass Cased Rifle Ammo, 20 Rounds, 50172PH-20RD
Armscor Precision Inc .223 Remington/5.56x45mm NATO Blank Brass Cased Rifle Ammo, 20 Rounds, 50172PH-20RD
(1)
List: $12.99 (Save 19%)
$10.49
$0.52/Round
Best Rated
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
7 models
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
(147)
As Low As (Save Up to 20%)
$11.39
$0.56 - $0.61/Round
See all 7 models
Best Rated
PMC Bronze Ammunition, .223 Remington, 55 Grain, Full Metal Jacket, Boat Tail, Brass Case, 20-Rounds, 223A
PMC Bronze Ammunition, .223 Remington, 55 Grain, Full Metal Jacket, Boat Tail, Brass Case, 20-Rounds, 223A
(45)
List: $22.99 (Save 54%)
$10.49
$0.52/Round
Blazin' Deal
Hornady Frontier .223 Remington 55 Grain Hollow Point Brass Cased Rifle Ammunition
4 models
Hornady Frontier .223 Remington 55 Grain Hollow Point Brass Cased Rifle Ammunition
(6)
As Low As (Save Up to 24%)
$14.39
$0.63 - $0.72/Round
See all 4 models
8% Coupon
Super Vel Ammunition .223 Remington 77 grain Open Tip Match Brass Cased Rifle Ammunition
2 models
Super Vel Ammunition .223 Remington 77 grain Open Tip Match Brass Cased Rifle Ammunition
(1)
As Low As (Save Up to 15%)
$60.29
$1.06 - $1.21/Round
See all 2 models
Blazin' Deal
Nosler Varmageddon .223 Remington 53 Grain Flat Base Tipped Brass Cased Rifle Ammunition
2 models
Nosler Varmageddon .223 Remington 53 Grain Flat Base Tipped Brass Cased Rifle Ammunition
(11)
As Low As (Save Up to 48%)
$18.49
$0.92 - $1.17/Round
See all 2 models
Best Rated
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
(12)
List: $18.89 (Save 31%)
$13.09
$0.65/Round
Blazin' Deal
Remington UMC .223 55 Grain Full Metal Jacket Brass Centerfire Rifle Ammunition
5 models
Remington UMC .223 55 Grain Full Metal Jacket Brass Centerfire Rifle Ammunition
(2)
As Low As (Save Up to 57%)
$18.59
$0.45 - $0.93/Round
See all 5 models
5% Coupon
Fiocchi Range Dynamics .223Remington 55 Grain FMJBT Brass Rifle Ammunition
2 models
Fiocchi Range Dynamics .223Remington 55 Grain FMJBT Brass Rifle Ammunition
(15)
As Low As (Save Up to 57%)
$26.09
$0.52 - $0.74/Round
See all 2 models
8% Coupon
Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammunition
3 models
Hornady Frontier .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammunition
(11)
As Low As (Save Up to 30%)
$10.99
$0.55 - $0.65/Round
See all 3 models
Best Rated
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
(7)
List: $24.99 (Save 27%)
$18.19
$0.91/Round
8% Coupon
Freedom Munitions .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition
3 models
Freedom Munitions .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition
As Low As (Save Up to 15%)
$27.19
$0.54 - $0.58/Round
See all 3 models
Best Rated
Hornady Critical Defense .223 Remington 55 grain Flex Tip eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80270
Hornady Critical Defense .223 Remington 55 grain Flex Tip eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80270
(10)
List: $33.39 (Save 19%)
$27.09
$1.35/Round
8% Coupon
Super Vel Ammunition 223 Remington 62 grain Solid Copper Hollow Point Brass Cased Rifle Ammunition
2 models
Super Vel Ammunition 223 Remington 62 grain Solid Copper Hollow Point Brass Cased Rifle Ammunition
As Low As (Save Up to 24%)
$30.19
$1.43 - $1.51/Round
See all 2 models
Best Rated
Hornady Critical Defense .223 Remington 73 grain Flex Tip eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80260
Hornady Critical Defense .223 Remington 73 grain Flex Tip eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80260
(6)
List: $33.39 (Save 20%)
$26.59
$1.33/Round
Blazin' Deal
Fiocchi Range Dynamics .223 Remington 62 Grain FMJBT Centerfire Rifle Ammunition
2 models
Fiocchi Range Dynamics .223 Remington 62 Grain FMJBT Centerfire Rifle Ammunition
(6)
As Low As (Save Up to 10%)
$28.49
$0.57 - $0.83/Round
See all 2 models
Clearance
Aguila Ammunition 5.56x45mm NATO Ammo 55 Grain Full Metal Jacket Brass Rifle Ammunition, 30 Rounds, 1E556155-BP
Aguila Ammunition 5.56x45mm NATO Ammo 55 Grain Full Metal Jacket Brass Rifle Ammunition, 30 Rounds, 1E556155-BP
(2)
List: $300.60 (Save 33%)
$199.99
$0.44/Round
Best Rated
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
(8)
List: $33.39 (Save 21%)
$26.29
$1.31/Round
8% Coupon
Remington UMC Rifle .223 45 Grain Jacketed Hollow Point Centerfire Rifle Ammunition
3 models
Remington UMC Rifle .223 45 Grain Jacketed Hollow Point Centerfire Rifle Ammunition
(1)
As Low As (Save Up to 21%)
$25.19
$1.26 - $1.42/Round
See all 3 models
Armscor Precision Inc USA .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition, 20 Rounds, FAC223-1N
Armscor Precision Inc USA .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition, 20 Rounds, FAC223-1N
(1)
List: $14.99 (Save 33%)
$9.99
$0.50/Round
8% Coupon
Hornady Frontier 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Rifle Ammunition
2 models
Hornady Frontier 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Rifle Ammunition
(2)
As Low As (Save Up to 20%)
$14.69
$0.69 - $0.73/Round
See all 2 models
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
(12)
List: $37.79 (Save 13%)
$32.89
$1.64/Round
First Breach Precision Series .223 Remington 55 Grain Full Metal Jacket Boat Tail 220 Brass Case Rifle Ammo, 1000 Rounds, 50005
First Breach Precision Series .223 Remington 55 Grain Full Metal Jacket Boat Tail 220 Brass Case Rifle Ammo, 1000 Rounds, 50005
(1)
List: $510.00 (Save $18.61)
$491.39
$0.49/Round
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
List: $89.00 (Save 12%)
$78.59
$0.65/Round
Best Rated
Hornady Frontier .223 Remington 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR160
Hornady Frontier .223 Remington 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR160
(9)
List: $21.99 (Save 40%)
$13.09
$0.65/Round
Remington UMC Rifle .223 50 Grain Jacketed Hollow Point Centerfire Rifle Ammunition
2 models
Remington UMC Rifle .223 50 Grain Jacketed Hollow Point Centerfire Rifle Ammunition
As Low As (Save Up to 12%)
$28.39
$1.42/Round
See all 2 models
Aguila Ammunition 5.56x45mm NATO 62 Grain Green Tipped Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 300 Rounds, 1E556125
Aguila Ammunition 5.56x45mm NATO 62 Grain Green Tipped Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 300 Rounds, 1E556125
(3)
List: $201.19 (Save 15%)
$171.29
$0.57/Round
Best Rated
Hornady American Gunner .223 Remington 55 grain Hollow Point Brass Cased Centerfire Rifle Ammo, 50 Rounds, 80237
Hornady American Gunner .223 Remington 55 grain Hollow Point Brass Cased Centerfire Rifle Ammo, 50 Rounds, 80237
(8)
List: $56.19 (Save 24%)
$42.89
$0.86/Round
Final Sale
Ammo, Inc. 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 200 Round, Box, 556055FMJ-A200
Ammo, Inc. 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 200 Round, Box, 556055FMJ-A200
(1)
List: $147.62 (Save 15%)
$125.19
$0.63/Round
Hornady Custom .223 Remington 55 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 50 Rounds, 80275
Hornady Custom .223 Remington 55 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 50 Rounds, 80275
(1)
List: $53.49 (Save 52%)
$25.89
$0.52/Round
SinterFire GreenLine .223 Remington 55 Frangible Brass Rifle Ammo, 50 Rounds, SF22355GL-C
SinterFire GreenLine .223 Remington 55 Frangible Brass Rifle Ammo, 50 Rounds, SF22355GL-C
List: $57.16 (Save 34%)
$37.69
$0.75/Round
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
List: $830.99 (Save 21%)
$655.89
$0.66/Round
Hornady Superformance .223 Remington 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80264
Hornady Superformance .223 Remington 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80264
(2)
List: $33.39 (Save 27%)
$24.39
$1.22/Round
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
List: $144.00 (Save 16%)
$120.59
$0.60/Round
Best Rated
Fiocchi Field Dynamics .223 Remington 55 Grain PSP Brass Cased Rifle Ammo, 50 Rounds, 223B50
Fiocchi Field Dynamics .223 Remington 55 Grain PSP Brass Cased Rifle Ammo, 50 Rounds, 223B50
(7)
List: $37.93 (Save 22%)
$29.69
$0.59/Round
Magtech 5.56X45 M193 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 50 Rounds, 556A
Magtech 5.56X45 M193 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 50 Rounds, 556A
(1)
List: $32.63 (Save 23%)
$25.19
$0.50/Round
G9 Defense 5.56mm 54 Grain Hollow Point Brass Cased Pistol Ammo, 20 Rounds, B-556-54A
G9 Defense 5.56mm 54 Grain Hollow Point Brass Cased Pistol Ammo, 20 Rounds, B-556-54A
(2)
List: $38.99 (Save $3.10)
$35.89
$1.79/Round
Best Rated
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
(63)
List: $15.99 (Save 33%)
$10.79
$0.54/Round
8% Coupon
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
2 models
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
(25)
As Low As (Save Up to 12%)
$18.09
$0.90 - $0.98/Round
See all 2 models
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
List: $49.99 (Save 25%)
$37.29
$1.86/Round
PPU 223 Remington,5.56 NATO 0 grain Brass Cased Blank Ammo 20 Rounds, PPB556A1
PPU 223 Remington,5.56 NATO 0 grain Brass Cased Blank Ammo 20 Rounds, PPB556A1
List: $25.49 (Save 42%)
$14.79
$0.74/Round
Best Rated
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
6 models
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
(132)
As Low As (Save Up to 11%)
$12.39
$0.62 - $0.64/Round
See all 6 models
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
List: $38.00
$37.89
$1.89/Round
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
List: $22.49 (Save 33%)
$15.09
$0.75/Round
Best Rated
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
2 models
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
(19)
As Low As (Save Up to $20.00)
$27.49
$1.30 - $1.37/Round
See all 2 models
8% Coupon
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
2 models
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
As Low As (Save Up to 33%)
$29.49
$0.59/Round
See all 2 models
Best Rated
Winchester USA .223 Remington, 55 Grain Full Metal Jacket Brass Rifle Ammunition
5 models
Winchester USA .223 Remington, 55 Grain Full Metal Jacket Brass Rifle Ammunition
(35)
As Low As (Save Up to 31%)
$11.79
$0.59 - $0.62/Round
See all 5 models
Best Rated
Hornady Black .223 Remington 62 grain Full Metal Jacket (FMJ) Brass Centerfire Rifle Ammunition
2 models
Hornady Black .223 Remington 62 grain Full Metal Jacket (FMJ) Brass Centerfire Rifle Ammunition
(9)
As Low As (Save Up to 23%)
$19.19
$0.90 - $0.96/Round
See all 2 models
Winchester FMJ Winchester LC .223 Remington 55 gr Rifle Brass Ammunition
2 models
Winchester FMJ Winchester LC .223 Remington 55 gr Rifle Brass Ammunition
As Low As (Save Up to 28%)
$12.69
$0.59 - $0.63/Round
See all 2 models
Freedom Munitions .223 Remington 62 Grain Full Metal Jacket Brass Rifle Ammunition
3 models
Freedom Munitions .223 Remington 62 Grain Full Metal Jacket Brass Rifle Ammunition
As Low As (Save Up to 32%)
$29.79
$0.59 - $0.60/Round
See all 3 models
Next

Ammo Boxes

1–5 / 5
Previous
On Sale
Frankford Arsenal Reloading Tools Hinge-Top Ammo Box
19 models
Frankford Arsenal Reloading Tools Hinge-Top Ammo Box
(10)
As Low As (Save Up to 48%)
$3.99
See all 19 models
RCBS Impact Resistant Ammo Box .223 Rem/5.56 NATO 86E0BB5F, RC86910
7 models
RCBS Impact Resistant Ammo Box .223 Rem/5.56 NATO 86E0BB5F, RC86910
List: $9.89 (Save 29%)
$6.99
MTM H50 Ammunition Box .17 Remington to .223 Remington Blue
MTM H50 Ammunition Box .17 Remington to .223 Remington Blue
(2)
List: $14.78
$13.99
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
2 models
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
(2)
List: $37.97 (Save $3.18)
$34.79
RCBS Ammo Box, Small Rifle, 86901
2 models
RCBS Ammo Box, Small Rifle, 86901
(2)
List: $21.89 (Save 48%)
$11.49
Next

Related Products to Heckler & Koch MR556-A1 Complete Upper Receiver Kit

Image of Heckler & Koch Threaded Barrel, USP9 Tactical, 9mm Heckler & Koch Threaded Barrel, USP9 Tactical, 9mm (1) List: $225.99 (Save 12%) $199.99
Image of Heckler & Koch Threaded Barrel, HK45 Tactical , 45 ACP Heckler & Koch Threaded Barrel, HK45 Tactical , 45 ACP List: $339.00 (Save 12%) $299.99
Image of Heckler & Koch Thread Protector Cap, HK45,HK45C,USP45,USP45C Heckler & Koch Thread Protector Cap, HK45,HK45C,USP45,USP45C (2) List: $46.80 (Save 11%) $41.75
Image of Heckler & Koch VP40 .40 S&W Threaded Pistol Barrel Heckler & Koch VP40 .40 S&W Threaded Pistol Barrel List: $276.99 (Save $7.00) $269.99
Image of Heckler & Koch MR556 9" M-LOK Handguard 2 models Heckler & Koch MR556 9" M-LOK Handguard As Low As (Save Up to $24.00) $209.99
Image of Heckler & Koch MR556 9" M-LOK Handguard 2 models Heckler & Koch MR556 9" M-LOK Handguard As Low As (Save Up to $24.00) $209.99
Image of Heckler & Koch SP5 Three Position Buttstock 2 models Heckler & Koch SP5 Three Position Buttstock (3) As Low As (Save Up to 41%) $365.79 Clearance
Image of Heckler & Koch SP5 Three Position Buttstock 2 models Heckler & Koch SP5 Three Position Buttstock (3) As Low As (Save Up to 41%) $365.79 Clearance
Image of Heckler & Koch MR762 14.7" M-LOK Handguard 2 models Heckler & Koch MR762 14.7" M-LOK Handguard (1) As Low As (Save Up to 25%) $193.99 Blazin' Deal
Image of Heckler & Koch MR762 14.7" M-LOK Handguard 2 models Heckler & Koch MR762 14.7" M-LOK Handguard (1) As Low As (Save Up to 25%) $193.99 Blazin' Deal
Image of Heckler & Koch USP/USP Tactical Match Trigger Conversion Kit Heckler & Koch USP/USP Tactical Match Trigger Conversion Kit List: $171.99 (Save 15%) $145.49
Image of Heckler & Koch SP5 Fixed Buttstock Heckler & Koch SP5 Fixed Buttstock (1) List: $185.00 (Save $11.51) $173.49
Image of Heckler & Koch SP5 Fixed Buttstock Heckler & Koch SP5 Fixed Buttstock (1) List: $185.00 (Save $11.51) $173.49
Image of HK 51000939 VP OR ELEVATED NIGHT SIGHTS HK 51000939 VP OR ELEVATED NIGHT SIGHTS List: $71.99 (Save $4.50) $67.49
Image of HK 51000939 VP OR ELEVATED NIGHT SIGHTS HK 51000939 VP OR ELEVATED NIGHT SIGHTS List: $71.99 (Save $4.50) $67.49
Image of Heckler & Koch VP9 Long Slide Optics Ready Complete Slide Kit Heckler & Koch VP9 Long Slide Optics Ready Complete Slide Kit (11) List: $433.99 (Save $4.00) $429.99 Best Rated
Image of Heckler & Koch Folding Stock for HK SP5K Heckler & Koch Folding Stock for HK SP5K (3) List: $461.29 (Save 12%) $405.99
Image of Heckler & Koch Folding Stock for HK SP5K Heckler & Koch Folding Stock for HK SP5K (3) List: $461.29 (Save 12%) $405.99
Image of Heckler & Koch VP9SK Optics Ready Slide Conversion Kit Heckler & Koch VP9SK Optics Ready Slide Conversion Kit List: $449.99 (Save 16%) $379.99
Image of Heckler & Koch Threaded Barrel, HK P30, 9mm Heckler & Koch Threaded Barrel, HK P30, 9mm (2) List: $295.71 (Save $11.22) $284.49
Image of Heckler & Koch Threaded Barrel, USP40 Tactical Heckler & Koch Threaded Barrel, USP40 Tactical (4) List: $303.99 (Save 11%) $269.99
Image of Heckler & Koch P30L, 9mm, Threaded Barrel Heckler & Koch P30L, 9mm, Threaded Barrel (1) List: $283.49 (Save $3.50) $279.99
Image of HK 51000982 HK45C TACTICAL THREADED BRRL 4.57 HK 51000982 HK45C TACTICAL THREADED BRRL 4.57 List: $205.99 $205.49
Image of Heckler & Koch Threaded Barrel, HK USP45 Tactical, 45 ACP Heckler & Koch Threaded Barrel, HK USP45 Tactical, 45 ACP (3) List: $303.99 (Save 11%) $269.99

Heckler & Koch MR556-A1 Complete Upper Receiver Kit Unavailable & Discontinued Models

List of Unorderable Models

Heckler & Koch MR556-A1 Complete Upper Receiver Kit, 5.56mm/.223 Remington, w/16.5in Barrel, 81000077 , MPN: 235975-A5 , UPC: 642230259300 , Code: 13-UFH-235975-A5
Compare (0)
1 item has been added
Add at least two items to compare