HK MR556/416 Receivers/Uppers
Upgrade the core of your HK MR556 or HK416. Choose from genuine HK receivers, complete upper receiver groups, and stripped uppers for custom builds.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly
H&K Heckler & Koch
$64.95H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly A great replacement or spare to keep on hand. Compatible with: HK MR556 HK 416 HK 416 A5 MR762 HK 417 Does not fit barrels less than 10 inches.HKP-00042$64.95 -
H&K HK MR556 Rear Lower Receiver Locking Pin
H&K Heckler & Koch
$59.95HK MR556, MR762 Locking Pin With Spring Loaded DetentFor the MR556 & MR762 or other AR15 Variants. This is the Rear takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the...HKP-02672$59.95 -
H&K HK MR556/MR762 Receiver Take Down Tool
H&K Heckler & Koch
$19.95HK MR556, MR762 Take Down Tool For The Upper & Lower ReceiverThis is also the tool that is used to tighten down the stock movement on the E1/E2 stock. Each tool will store in the rear of the E1/E2 stock.Please note: That we get these from HK and...HKP-02653$19.95 -
H&K HK MR556/416 Receiver End Plate
H&K Heckler & Koch
$14.95HK 416, MR556 End Plate For Receiver & Buffer TubeFits all HK MR556 & HK 416 upper receiever/buffer tubes. New HK German manufacture.HKP-16603$14.95 -
H&K HK416 A5 Factory German Extended Castle Nut
H&K Heckler & Koch
$49.95Original HK Factory German steel 416 A5 Extended Castle Nut. Perfect for MR556, HK 416 A5 builds, or upgrades.HKP-19164$49.95 -
H&K HK MR556/MR762 Front Lower Receiver Locking Pin
H&K Heckler & Koch
$59.95HK MR556 Locking Pin With Spring Loaded Detent Front pin assembly for the MR556, or other AR Variants. This is the front (large) takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the...HKP-02663$59.95 -
HK 416 10.4" Upper Gas Block - German
$279.95HK German 10.4" Upper Gas Block Complete New HK German manufactureGreat Spare part or to use on the MR556- HK 416 10.4" barrel conversion. This is the ONLY 10.4" gas block available from HK Germany. HK 10.4" uppers HK MR556 to 10.4" conversionsThis unit...HKP-01543$279.95 -
Out Of Stock
H&K 416A5/MR223 RAL8000 Stripped Upper Receiver
H&K Heckler & Koch
$0.00HK German Un-Assembled Stripped HK 416A5 Upper Receiver - Ral 8000 Brand new factory German upper receiver. HK 416A5/MR223 factory RAL8000 stripped upper receiver. with 416A5 type markings. Looking for a matching lower for your build? STS416 A5...HKP-18787$0.00 -
H&K HK MR556/416 Vented Slimeline Gas Block
H&K Heckler & Koch
$135.00HK German MR556, 416 Gas Block Complete - Low Profile This is the factory slim-line, low-profile gas block for the MR556/HK416. No bayo lug or sling attachment points. This is the factory correct gas block found on the MR556 firearm. This is also the...HKP-02660$135.00 -
Out Of Stock
HKP HK 416C 9" Complete Upper Kit
HKP HK Parts
$2,799.95HK416C Complete Upper Kit - 9" After years trying to get these back in. We finally bring you a rare unicorn of a find. With our complete 416c upper kit all that would be needed to complete this kit would be a mil-spec lower or a STS 416c lower...HKP-21042$2,799.95 -
H&K HK MR556 M-LOK 16.5" Forearm Upper Kit - Black
H&K Heckler & Koch
$1,779.95New HK Factory German MR556 Upper Kit with M-Lok forearm HK MR556 Upper kit includes: Complete MR556 upper receiver with M-Lok forearm MR556 Bolt group Complete Tungsten Filled HK Buffer HK Buffer Spring One 30 Round HK Steel Maritime Magazine No FFL...HKP-17366$1,779.95 -
H&K HK MR556 Upper Receiver w/ F/A & Ejection Door
H&K Heckler & Koch
$694.95New HK German Partially Pre-Assembled MR556 Upper Receiver Each unit comes just as shown with the forward assist assembly and ejection port door assembly installed from the HK factory. MR556 HK 416 Clone buildsHKP-16950$694.95 -
HKP HK 416, MR556 Upper Receiver Forging
HKP HK Parts
$99.95HK Parts' very own 416 upper reciever forging. This is the first time that these forgings have been made available to the public. Our receivers come with the ever popular Cerro Forge "keyhole" marking. Cerro Forge is a premier manufacturer of forged...HKP-21008$99.95 -
HKP HK MR556/416 Upper 8" 416C Style Conversion Kit w/ Handguard
HKP HK Parts
$1,495.95MR556 & HK416 Upper Conversion Kit - 8" - HK 416C Style Finally an answer for all of those that have been wanting as close to the original HK 416C 8" barrel conversion kit for 416 or MR556. Each upgrade kit is as close as you can get to a factory HK...HKP-18628$1,495.95 -
H&K HK MR556/416 Brass Catcher
H&K Heckler & Koch
$799.95HK 416, MR556 Brass Catcher HK Factory German HK 416 Brass CatcherHKP-18046$799.95 -
H&K HK MR556/416 Upper Receiver Threaded Piston Guide
H&K Heckler & Koch
$19.95MR556 & HK416 - Gas Piston Guide Bushing For Upper ReceiverMR556 & HK416 Piston Guide Bushing Threaded For Upper Receiver For All HK 416 & MR556 Firearms. HK MR556 HK 416 HK M27HKP-02640$19.95 -
On Sale
B&T HK MR556/MR762/416/417 Brass Catcher
B&T Brugger & Thomet
Now: $324.95Was: $369.95B&T Picatinny Rail-Mount Brass Catcher This B&T brass catcher is quick and easy to install on to your factory picatinny mount equipped handguard. If your handguard does not have a picatinny rail to mount the brass catcher, you can simply...HKP-16899Now: $324.95Was: $369.95 -
Out Of Stock
H&K HK 416 10.4" Vented Upper Gas Block
H&K Heckler & Koch
$0.00HK German 10.4" Upper Gas Block Complete New Vented StyleNew HK German manufacture newest "VENTED" version direct from HK Germany.Great upgrade part for existing 10.4" uppers that have the older style non-vented gas block or to use on the MR556-HK 416...HKP-18056$0.00 -
H&K HK 416 14.5 Upper Kit - OTB - Unfired
H&K Heckler & Koch
$14,499.95Unfired "BF" Date Coded HK Factory German 416 14.5" Upper Kit Super Rare. New 2015 Production Unfired HK German 416 Upper Kit - OTB HK 416 upper kit includes the following new HK 416 parts: HK 416 Complete upper receiver with the latest "over the beach"...HKP-02095$14,499.95 -
Out Of Stock
H&K HK 416A5 Stripped Upper Receiver - Black
H&K Heckler & Koch
$0.00HK 416A5 - Stripped Upper Receiver - Black This is the factory correct receiver for a true 416 build as it features the full-auto relief cut in the bottom, rear portion of the receiver (shown in last pricture). Compatible With: HK 416 HK MR223 HK MR556HKP-18786$0.00 -
Out Of Stock
H&K HK MR556 Incomplete Upper Receiver
H&K Heckler & Koch
$0.00HK German Stripped HK 416/MR556 Upper Receiver Brand New factory German manufacture incomplete and unmarked.HKP-02615$0.00 -
Out Of Stock
H&K HK MR556/MR223 A5 Incomplete Upper Receiver - Black
H&K Heckler & Koch
$0.00HK German Un-Assembled/Stripped HK MR556/MR223 A5 Upper Receiver Factory HK MR556 A5 upper receiver. This is the semi-auto MR556 variant, not the full-auto 416 version. Compatible With: HK MR556 HK MR223 HK 416*** ***Please Note: Although this...HKP-18785$0.00 -
Out Of Stock
H&K HK MR556/MR762/416 Buffer Staking Tool
H&K Heckler & Koch
$0.00HK 416, MR556 & MR762, HK 417 - Buffer Staking Tool - German HK Rare HK factory HK staking tool for the castle nut to be staked. These took over 3 years to get and offered for cost while supplies last! Each tool is the factory correct tool used for...HKP-16945$0.00 -
Out Of Stock
HKP HK 416/MR556 14.5 " Upper Conversion Kit, 14.5"
HKP HK Parts
$699.95MR556 & HK416 Upper Conversion Kit - 14.5"Finally an answer for all of those that have been wanting a 14.5" upper for an HK416 or MR556. This conversion kit adds an upper or a barrel option for your MR556, CR556 & HK 416's. Each upgrade kit is...HKP-17877$699.95 -
Out Of Stock
HKP HK MR556/416 9" HK416C Style Barrel Upper Conversion Kit
HKP HK Parts
$0.00MR556 & HK416 Upper Conversion Kit - 9" - HK 416C StyleFinally an answer for all of those that have been wanting as close to the origional, rare unicorn of a find HK 416C 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18401$0.00 -
Out Of Stock
HKP HK MR556/416 Incomplete Upper Receiver
HKP HK Parts
$0.00New US Made Un-assembled Stripped HK 416, MR556 Style - Upper Receiver New US made HK416/MR556 Style upper receiver. A great spare part and item at a fraction of the cost of the factory HK part. Full compatible with all factory HK parts, bolt carrier...HKP-17783$0.00 -
HKP HK MR556/416 Upper 8" 416C Style Conversion Kit
HKP HK Parts
$1,285.95MR556 & HK416 Upper Conversion Kit - 8" - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 8" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18629$1,285.95 -
Out Of Stock
HKP HK MR556/416 Upper 9" 416C Style Conversion Kit
HKP HK Parts
$899.95MR556 & HK416 Upper Conversion Kit - 9" - HK 416C StyleFinally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18674$899.95