HK MR556/416 Series
Our extensive collection boasts a wide array of HK MR556 and HK 416 parts, including precision HK MR556 Barrels and durable HK 416 Stocks. Elevate your rifle's functionality with HK 416 Handguards and HK MR556 Triggers, designed for the discerning shooter seeking top-tier performance.
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MI HK MR556/416 M-LOK Compatible 13." Carbine Handguard
MI Midwest Industries
$269.74Simple installation, direct replacement for HK factory handguard Retains factory barrel nut Mil-spec top rail Seven sides of M-LOK? compatible slots Lightweight, rugged 6061 aluminum construction, mil-spec hard coat anodized Cross bolt constructed of...HKP-18437$269.74 -
Solar Tactical HK MR556/MR762 Kydex Grip Wrap - Black
Solar Tactical
$89.95Kydex Grip Wrap - HK MR762 & MR556Featureless Kydex grip wrap for use with detachable magazines. Prevents a wrap around style pistol grip. Allows the use of the factory magazine release and detachable magazines over 10rds. Preban hi-capacity...HKP-18891$89.95 -
Strike Industries 1913 Picatinny Backup Sights
Strike Industries
$84.95Strike Industries 1913 Picatinny Backup Sights Feautures: Built-in backup sights when flipped down for quick target acquisition Low-profile and low snag design Tool-less adjustments of windage and elevation Quick sliding dual aperture rear sight...HKP-21314$84.95 -
On Sale
SureFire Procomp 5.56/223 Muzzle Brake
Surefire
Now: $84.95Was: $109.95The advanced SureFire ProComp 556 muzzle brake, which fits M4/M16 weapons and variants with 1/2-28 muzzle threads, greatly reduces both recoil impulse and muzzle rise so that the weapon tracks straight back to keep you on target for faster shot-to-shot...HKP-19666Now: $84.95Was: $109.95 -
Out Of Stock
H&K 30 Round AR-15 5.56 x 45mm / .223 Magazine - Black
H&K Heckler & Koch
$0.0030 Round Magazine with Window - Black - Gen 3 - Heckler and KochFactory German Heckler & Koch 30-round Gen3 polymer magazines, compatible with 5.56mm weapon systems: HK416 / MR223 / AR15 / M16 / M4 type rifles.HKP-19359$0.00 -
Out Of Stock
H&K 30 Round HK MR556/416/AR-15 5.56 Magazine - Black
H&K Heckler & Koch
$0.00Fits HK MR556A1, HK416, AR15 and all high quality AR/M4/M16 type firearms. Heckler & Koch reliability and durability in a 30 round 5.56 mm Polymer Magazine at a special price.Designed to provide optimal ammunition feeding for any M16/M4/AR15-type...HKP-15805$0.00 -
Out Of Stock
H&K 30 Round HK MR556/416/AR-15 5.56 Magazine - RAL 8K
H&K Heckler & Koch
$0.00HK 416/MR556 30 Round Magazine - RAL8000Fits HK MR556A1, HK416, AR15 and all high quality AR/M4/M16 type firearms. Heckler & Koch reliability and durability in a 30 round 5.56 mm Polymer Magazine.Designed to provide optimal ammunition feeding for...HKP-18780$0.00 -
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 -
Out Of Stock
H&K HK 416 Collapsible Stock Mil Spec - RAL 7008
H&K Heckler & Koch
$0.00Collapsible HK 416 E1 Style Mil Spec - HK 416 RAL7008 - Dark Earth ColorGenuine Heckler & Koch HK416 surplus buttstocks in the RAL 7008 color scheme. HK-USA nows offers these surplus E1 Mil-Spec stocks which can be hard to find and are perfect for...HKP-19503$0.00 -
Out Of Stock
H&K HK 416 Complete Bolt Group
H&K Heckler & Koch
$0.00HK 416 Bolt Group Complete - German New HK German 416 Bolt group. Rare component as the HK bolt groups are now considered EUC items and are not for sale from HK Germany. Each unit is factory fresh with all of the OTB upgrades. Includes: HK 416 F/A...HKP-00043$0.00 -
Out Of Stock
H&K HK 416 H-Key Complete Short Handguard - Black
H&K Heckler & Koch
$0.00Slim line handguard with HKey mounting slots, short.Fits all: HK 416 A5 - 11" HK 416 A5 - 14.5" HK 416 A5 - 16.5" HK 416 A5 - 20"HKP-18611$0.00 -
Out Of Stock
H&K HK 416 H-Key Complete Short Handguard - FDE
H&K Heckler & Koch
$0.00Slim line handguard with HKey mounting slots, short.Fits all: HK 416 A5 - 11" HK 416 A5 - 14.5" HK 416 A5 - 16.5" HK 416 A5 - 20"HKP-18696$0.00 -
Out Of Stock
H&K HK 416, HK 417 Buttstock Release Lever - RAL8000
H&K Heckler & Koch
$0.00Buttstock Release Lever - RAL8000 - HK 416 & 417HKP-19339$0.00 -
Out Of Stock
H&K HK 416, MR556, MR762 Battle Grip With Storage - FDE
H&K Heckler & Koch
$0.00HK 416, MR556 & MR762, HK 417 Battle Grip With Storage Compartment - Dark Earth New HK German factory battle grip with a storage compartment in the bottom of the grip. Each grip will fit all AR-15/M-16 Lower Receivers As Well. Superior fit & feel...HKP-19519$0.00 -
Out Of Stock
H&K HK 416/MR556/MR762 Pistol Grip Screw
H&K Heckler & Koch
$0.00HK MR556, 416 & MR762 Pistol Grip Retaining Screw. This is the screw that is used to retail all battle grips/pistol grips on the HK and standard AR15/M16 firearms. HK416 HK MR556 HK MR762 HK417HKP-02679$0.00 -
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 M16 relief cut in the bottom, rear portion of the receiver (shown in last pricture). Compatible With: HK 416 HK MR223 HK MR556 Need...HKP-18786$0.00 -
Out Of Stock
H&K HK MR556 Complete Bolt Head
H&K Heckler & Koch
$0.00New HK German MR556, Bolt Head CompleteBrand new factory German bolt head with all the components to make the bolt head complete. HK MR556HKP-02712$0.00 -
Out Of Stock
H&K HK MR556 Incomplete Upper Receiver
H&K Heckler & Koch
$0.00HK German Stripped HK MR556 Upper Receiver New factory German incomplete and unmarked MR556 upper receiver. Compatible With: HK MR556 HK MR223 HK 416*** Need a matching lower for your build? STS416 A5 LOWER - Specialized Tactical...HKP-02615$0.00 -
H&K HK MR556/416 9" Modular Rail System - Black
H&K Heckler & Koch
$399.95HK MR556, CR556 Modular Rail System 9"- Black HK German MR556 & CR556 handgaurd that accepts the HKey style modular rail sections. This is also the forearm that clear the OSS suppressor system. MR 556 HK 416 CR 556 *Weight: 13.4 Ounces*HKP-17341$399.95 -
Out Of Stock
H&K HK MR556/416 Complete Floor Plate
H&K Heckler & Koch
$0.00HK German HK 416, MR556Â Floor Plate Extension CompleteAll steel HK Marked 30, 20 & 10 round floor plate. Â Each unit comes complete with with the rubber bushing installed finished in the maritime finish. A great spare to have on hand as these do...HKP-15209$0.00 -
Out Of Stock
H&K HK MR556/416 E1 Charging Handle - FDE
H&K Heckler & Koch
$0.00New FDE HK Designed HK416, MR556 Ambidextrous Charging Handle (E1).The E1 HK 416 FDE charging handle release latch has the ability of being swapped from the left side (E1) to the right sight (E2) with simple tools. HK's own design boasts a smooth &...hkp-18502$0.00 -
Out Of Stock
H&K HK MR556/416 Ejection Port Spring
H&K Heckler & Koch
$0.00HK MR556, HK416 Ejection Port Spring For Ejection Port.HKP-02616$0.00 -
Out Of Stock
H&K HK MR556/416 Ejector Port Cover Pin
H&K Heckler & Koch
$0.00HK MR556, HK416 Ejection Port Pin For Ejection Port.HKP-02661$0.00 -
Out Of Stock
H&K HK MR556/416 Forward Assist Assembly
H&K Heckler & Koch
$0.00HK 416, MR556 Forward Assist AssemblyHK German Factory MR556 & HK416 forward assist assembly complete.Brand new and factory fresh manufacture.HKP-16528$0.00 -
Out Of Stock
H&K HK MR556/416 Forward Assist Plunger Pin
H&K Heckler & Koch
$0.00HK MR556 & HK 416 Forward Assist Plunger Retaining PinHKP-17542$0.00 -
H&K HK MR556/416 Hammer
H&K Heckler & Koch
$189.95HK German 416 & MR556HK German 416, MR556 Hammer, Hammer Spring . This is a full auto hammer.PLEASE NOTE THAT THIS BATCH THAT CAME FROM HK DOES NOT HAVE THE BUSHING. THIS ITEM IS THE HAMMER AND SPRING ASSEMBLY WITHOUT THE SIDE BUSHING INCLUDED. HK...HKP-02673$189.95 -
Out Of Stock
H&K HK MR556/416 Handguard Picatinny Profile - Black
H&K Heckler & Koch
$0.00Handguard with Picatinny profile on 3, 6 and 9 o'clock, STANAG 4694 profile on 12 o'clock.Fits all: HK 416 A5 - 14.5" HK 416 A5 - 16.5" HK 416 A5 - 20"HKP-18493$0.00 -
Out Of Stock
H&K HK MR556/416 Handguard Picatinny Quad Rail - FDE
H&K Heckler & Koch
$0.00Handguard with Picatinny Quad Rail profile on 3, 6 and 9 o'clock, STANAG 4694 profile on 12 o'clock. New HK GermanFits all: HK 416 A5 - 14.5" HK 416 A5 - 16.5" HK 416 A5 - 20"HKP-18553$0.00 -
Out Of Stock
H&K HK MR556/416 Mag Locking Plate
H&K Heckler & Koch
$0.00HK German HK MR556, HK 416 Magazine Locking PlateFits all HK German 416 30, 20 & 10 round steel magazines. Great spare for wear and replacement.HKP-13484$0.00 -
Out Of Stock
H&K HK MR556/416 Steel Maritime Magazine Follower
H&K Heckler & Koch
$0.00HK 416, MR556 Metal Maritime Magazine Follower. Fits all HK 416 factory magazines such as 30, 20 and 10 round.HKP-15452$0.00 -
Out Of Stock
H&K HK MR556/416 Titanium Barrel Nut
HKP HK Parts
$99.95Titanium HK MR556, HK 416 Barrel Nut Or Socket For BarrelA must have repair and replacement part for removal or when you have any work done to your barrel as the barrel nut may become damaged in the removal and installation processes. Made in the USA...HKP-17275$99.95 -
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. Compatible With: HK MR556 HK MR223 HK 416*** Need a matching lower for your build? STS416 A5 LOWER -...HKP-18785$0.00 -
H&K HK MR556/MR762 Buttstock Release Lever
H&K Heckler & Koch
$9.95HK MR556 & MR762 Buttstock Release LeverHKP-16621$9.95 -
Out Of Stock
H&K HK MR556/MR762 Fixed Tactical Sling Adapter
H&K Heckler & Koch
$0.00HK MR556 & MR762 Factory Sling Adapter - FixedFactory HK German Design & The Finest Design Available & Made To Last. New HK Manufactured Part To Allow The Factory HK416, MR762 Slings To Fit & Work On The MR556, MR762 As This Adds The...HKP-17553$0.00 -
Out Of Stock
H&K HK MR556/MR762 Long Disconnector Spring
H&K Heckler & Koch
$0.00HK MR556, MR762 Disconnector Spring - LongHK German manufactured disconnector spring. This is the longer of the 2 springs found in the trigger/sear assembly. HK MR556 HK MR762 HK 416 HK 417HKP-16774$0.00 -
Out Of Stock
H&K HK MR556/MR762 Tactical Sling Adapter
H&K Heckler & Koch
$0.00HK MR556 & MR762 Factory Sling Adapter - Swivel Style Factory HK German design. New HK manufactured part that allows the factory HK416, MR762 slings to fit the MR556, MR762 by providing the proper attachment point. This unit swivels and rotates for...HKP-02507$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
H&K HK MR556/MR762/416 Sniper PSG1 Style Grip - Ral 8K
H&K Heckler & Koch
$0.00HK MR556, HK 416 & MR762, HK 417 PSG1 Style Grip - Ral 8000 - SniperHK German PSG1 style sniper factory. Each grip will fit all AR-15/M-16 Lower Receivers As Well. Superior fit & feel to any other grip on the market. HK has hit a home run with...HKP-17693$0.00 -
Out Of Stock
H&K HK MR556/MR762/416/417 Forward Assist Plunger Spring
H&K Heckler & Koch
$0.00Forward Assist Plunger Spring For MR556, HK416, HK417 & MR762New HK German manufacture. HK MR556 HK 416 MR762 HK 417 HK G28 HK M27HKP-02537$0.00 -
Out Of Stock
H&K HK MR556/MR762/416/417 Magazine Catch Spring
H&K Heckler & Koch
$0.00HK MR556, HK 416 & MR762 & 417 Magazine Catch SpringHK Magazine catch spring for the mag catch assembly. HK German manufacture. HK MR556 HK 416, M27 HK MR762 HK 417, G28 AR15, M4 & M16 firearmsHKP-02620$0.00