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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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 StyleFactory 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...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 -
Out Of Stock
H&K HK MR556/MR762/HK416 A5 Rail Cover Set - RAL 8K
H&K Heckler & Koch
$0.00Each rail measures:8 3/8" Long (X2), 1 X Short rail 6" Long1 3/8" WideBrand new Heckler & Koch HK 416A5 Style picatinny rail covers made of high impact HK polymer. Each rail is equipped with a quick release tab & marked with the HK logo. These...HKP-17705$0.00 -
Out Of Stock
H&K HK416, MR556 Ejection Port Cover - FDE
H&K Heckler & Koch
$0.00HK German HK 416, MR556 Ejection Port Cover In RAL7008 -FDEHK manufactured newer polymer style cover assembly found on the latest HK 416 & MR556's. This item can also be used on other AR15 style projects to enhance the project with the finest...HKP-19450$0.00 -
Out Of Stock
H&K MR556/416 Extended Windowed Handguard - RAL 8K
H&K Heckler & Koch
$0.00HK416A5, MR556 Extended Windowed Handguard - Ral 8000HK German HK416A5 Extended forearm with window for use of the suppressed/non-suppressed gas block. This handguard is designed to minimize mirage and the utmost in performance. 14 7/8" long overall 1...HKP-17711$0.00 -
Out Of Stock
H&K MR556/416 Forearm Front Folding Sight - RAL 8K
H&K Heckler & Koch
$0.00HK 416A5 9" Quad Rail With Flip Up Front Sight - Ral 8000/TanNew latest production HK 416A5, MR556 9" quad rail with integrated built in front flip up sight. Latest upgraded design with the laser markings for the adjustable gas block for suppressed and...HKP-17680$0.00 -
Out Of Stock
HK MR556/416 DMR Extra Long Forearm - Black
H&K Heckler & Koch
$0.00HK MR556, 416 Extended Free Floating Rail System - BlackNew Heckler & Koch MR556, HK 416 Extended DMR (designated marksman rifle) Forearm With Suppressor Window Cutout. Optimized design to mitigate the heat emissions for long range shooting and to...HKP-17683$0.00 -
Out Of Stock
HK MR556/416 Firing Pin Catch
H&K Heckler & Koch
$0.00HK 416, MR556 Firing Pin Block Safety CatchHKP-16846$0.00 -
HKP 2 Point Leather & Cotton Sling
HKP HK Parts
$59.952 Point Leather & Cotton Sling Designed to replicate the original, out of production, German HK offering. Each sling is handcrafted in the US by a German artisan using quality US leather and hardware. Each sling is approximately 48" long...HKP-21320-M$59.95 -
Out Of Stock
HKP HK 416/MR556 14.5 " Barrel Kit
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 10.4" .556 Barrel
HKP HK Parts
$369.95MR556 & HK416 Barrel - 10.4"- USA PLEASE NOTE THIS OFFERING IS THE HK 416 10.4" BARREL ONLY! UPDATES PICS OF THE BARREL ARE COMING SOON! THE PICTURES SHOW A COMPLETE UPPER KIT HOWEVER THIS THE LISTING FOR THE BARREL WITH BARREL EXTENSION INSTALLED...HKP-18200$369.95 -
Out Of Stock
HKP HK MR556/416 9" HK416C Style Barrel Conversion Kit
HKP HK Parts
$0.00MR556 & HK416 Barrel Conversion Kit - 9" - HK 416C Style Finally 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...HKP-18401$0.00 -
Out Of Stock
HKP HK MR556/416 A5 Style Trigger Guard - RAL 8K
HKP HK Parts
$39.95HK416 & HK MR556 HK416A5 Style Trigger Guard - RAL8000HKP-17832$39.95 -
Out Of Stock
HKP HK MR556/416 DMR Extended 15" M-LOK Handguard - Black
HKP HK Parts
$249.95HK MR556 & HK416 Extended DMR 15" Handguard - MLOKA drop on replacement forearm for the HK MR556 and HK 416. A perfect upgrade for your HK rifle. This rail also provides an additional 6" of rail length for more flexibility and great control.HKP-18019$249.95 -
Out Of Stock
HKP HK MR556/416 DMR Extended 15" Quad Rail - Black
HKP HK Parts
$259.95HK MR556 & HK416 DMR Length 15" Quad Rail - ExtendedHKP-18018$259.95 -
Out Of Stock
HKP HK MR556/416 Partially Complete Upper Receiver
HKP HK Parts
$489.95US Made Partially Complete HK 416, MR556 Style Upper Receiver New US made HK416/MR556 style upper receiver. Includes: Upper receiver Forward assist assembly Ejection port door assembly Piston guide Compatible With: HK MR556 HK MR223 HK...HKP-17783$489.95 -
Out Of Stock
HKP HK MR556/416 Standard Length 9" Quad Rail Black
HKP HK Parts
$219.95HK 416, MR556 Quad Rail- Standard LengthHK416 & MR556 quad rail complete that includes HK 416/MR556 Handguard Screw. This handguard can also be installed on the CR556 models as well. Made 100% in the USA. HK 416 HK MR556 HK CR556Weight: 12.3 ozHKP-17963$219.95 -
Out Of Stock
HKP HK MR556/416 Titanium Firing Pin Catch
HKP HK Parts
$49.95HK MR556 & HK416 Firing Pin - TitaniumGrade 6 weapons grade Titanium manufacture. Made 100% in the USA A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK MR556 & HK 416 weapon system. Get the...HKP-17767$49.95 -
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 Style Finally 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 -
HKP HK MR556/CR556/MR762 H-Key 11 Rail Segment
HKP HK Parts
$34.9511 slot rail segment for the new "HKey" style forearms. This rail section is designed to fit and attach to any of the new HKey style forearms now being shipped on the MR556, CR556, MR762 and similar models. Made from aircraft grade aluminum, fully hard...HKP-17845$34.95 -
HKP MR556/HK 416C A5 Flash Hider
HKP HK Parts
$59.95HKP MR556/HK 416C A5 Flash Hider Made from ordnance grade steel, heat treated, and Melonited (Nitride process) for maximum longevity. Machined correctly to reduce tunning fork noise for a more pleasant time at the range. This is the perfect 4 prong 416C...HKP-21342$59.95 -
HKP Short KeyMod Quad Rail - Black
HKP HK Parts
$199.95MR556/416 KeyMod Qaud Rail - ShortHKP-17985$199.95 -
On Sale
HKP Single Point Leather Sling - Red
HKP HK Parts
Now: $34.95Was: $49.95Single Point Leather Sling - Red Our leather sling utilizes two HK style sling hooks to attach to a single mounting point. Designed to replicate the original, out of production, German HK offering. Each sling is handcrafted in the US by a German artisan...HKP-20160Now: $34.95Was: $49.95 -
Out Of Stock
HKP, Walther 416 .22LR PDWC Retractable Stock - Black
HKP HK Parts
$199.95HK 416C Style PDW Stock - HK, Walther .22 LR Finally the most anticipated PDW style AR14, M4 Stock ever developed that is now made for the HK 416 .22 models. Made 100% in the USA. Each PDW stock set includes: 5 position stainless steel nitrided...HKP-17840$199.95 -
JMAC Universal Picatinny 8" Arm Bar with Brace Adapter
JMAC Customs
$279.85JMAC Arm Bar 8" Inch Rise with Brace Adapter and 1913 Folding Mech (A)rm(B)ar(8)inch(R)ise + AB-BA Brace Adapter + our 1913 Folding Mech (not assembled) Features: Modular Design - Brace/Stock with many mounting options Integrated QD Sling Socket 8"...HKP-21247$279.85 -
JMAC Universal Picatinny 8" Stock with 1913 Folding Mech
JMAC Customs
$309.90JMac 8" Stock with 0.275" Cheek Rise - 1913 Attachment Our new TANodized 7075 options have a very rich metallic bronze tone with a unique lustrous sheen, we like to call it "Boujie Tan"! Features: NEW Redesigned Look! NEW Integrated Rubber Buttpad!! 2x...HKP-21243$309.90 -
JMAC Universal Picatinny 8" Triangle Stock with 1913 Folding Mech
JMAC Customs
$261.00JMAC Triangle Stock 8" Stock with 1913 Folding Mech Features: 2x Integrated QD Sling Socket 8" Length 0.275" Cheek Rise Drilled and tapped for optional cheek risers 7075 T6 Aluminum Hard-Coat Anodized **Not compatible w/LevTech Manufacturing panels...HKP-21245$261.00 -
JMAC Universal Picatinny 9" Stock with 1913 Folding Mech
JMAC Customs
$309.90JMac 9" Stock with 0.275" Cheek Rise - 1913 Attachment Feautures: NEW Integrated Rubber Buttpad!! 2x Integrated QD Sling Socket 9" Length 0.275" Cheek Rise Drilled and tapped for optional cheek risers Compatible with JMAC & SIG folding...HKP-21242-M$309.90 -
JMAC Universal Picatinny 9" Triangle Stock with 1913 Folding Mech - Green
JMAC Customs
$294.90JMac 9" Triangle Stock with 0.275" Cheek Rise - 1913 Attachment Features: NEW Redesigned Look! NEW Integrated Rubber Buttpad!! 2x Integrated QD Sling Socket 8" Length 0.275" Cheek Rise Drilled and tapped for optional cheek risers Compatible with JMAC...HKP-21246$294.90