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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H&K MR556/417 Trigger, Hammer Pin
H&K Heckler & Koch
$14.99H&K MR556/417 Trigger, Hammer Pin Compatible With: HK MR556 HK 417HKP-15456$14.99 -
H&K Scope Mount Ring Set - 1 Inch For 30mm Scope
H&K Heckler & Koch
$89.95H&K Scope Mount Ring Set - 1 Inch For 30mm Scope Each set includes one complete set of inserts for one complete setup (4 individual sides). This is a Genuine HK German part. Insert rings (1 inch) - HK 30mm claw mount not included.HKP-02474$89.95 -
Picatinny to Harris Bipod Adapter
HKP HK Parts
$34.95Harris Bipod Adapter This mounts to any Picatinny rail and proves a stable platform to add a Harris bipod or other similar-style bipod. This will fit any Picatinny spec rail or rail system. Made in the US out of aircraft-grade aluminum and steel.HKP-00909$34.95 -
SB Tactical SBA5 Brace
SB Tactical
$123.95SB Tactical SBA5 Brace The SBA5 Pistol Stabilizing Brace is 5-position adjustable and designed for all platforms capable of accepting a mil-spec carbine receiver extension. Featuring an integral, ambidextrous QD sling socket and an arm cuff based on the...HKP-21794$123.95 -
Out Of Stock
Solar Tactical HK MR556/MR762 Kydex Grip Wrap - Black
Solar Tactical
$89.95Kydex Grip Wrap - HK MR762 & MR556 Featureless 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 10 rounds. Preban hi-capacity...HKP-18891$89.95 -
Aimpoint Lower 1/3 Co-Witness T1 Mount
AIM
$29.99Aimpoint - T1 Mount - Lower 1/3 Co-Witness Features a machined recoil lug for consistent, repeatable mounting. Features: 6061 T6 aluminum Black anodized Machined recoil lug Compatible With: Aimpoint T1 / H1 Series opticsHKP-19335$29.99 -
H&K HK MR556/MR762 Tactical Sling Adapter
H&K Heckler & Koch
$130.00HK MR556 & MR762 Factory Sling Adapter - Swivel Style Factory HK German design. New HK manufactured part that allows the factory HK416 and MR762 slings to fit the MR556 and MR762 by providing the proper attachment point. This unit swivels...HKP-02507$130.00 -
HK 416, MR556 Roll Pin for Charging Handle - HKP
$7.95HK 416, MR556 Roll Pin for Charging Handle - HKP This is the shorter one that is used on the inside of the charging handle. There are two of these pins used per charging handle.HKP-16536$7.95 -
HKP HK MR556/416 Extractor Spring Buffer
HKP HK Parts
$5.39HKP HK MR556/416 Extractor Spring Buffer This buffer fits inside the extractor spring in the extractor pocked of the bolt. This item is a high wear item and a spare would be highly advised. Compatible With: HK MR556 & HK416 FirearmsHKP-21604$5.39 -
Nefarious Arms HK 416 Installation Barrel
Nefarious Arms
$154.95Nefarious Arms HK 416 Installation Barrel HK416 multitool patterned off a genuine HK 416 wrench with added upgrades Used with a traditional 1/2″ torque wrench or the plug-and-socket style torque wrench that utilizes the ball detent...HKP-21487$154.95 -
Trijicon RMR/SRO 45° Rail Offset Adapter
USA
$91.45Trijicon RMR/SRO 45° Rail Offset Adapter Perfect for that situation where you need the versatility of a magnified optic paired with a Trijicon RMR or SRO red dot sight in close quarters. This offset rail adapter attaches to the firearm's picatinny...HKP-20336$91.45 -
B&T Direct Thread 1/2x28 Hub Adapter
B&T Brugger & Thomet
$115.00B&T Direct Thread 1/2x28 Hub Adapter Convert any barrel to accept Hub devices with this direct fit adapter. Compatible With: MP5/K & SP5/K HK 416/MR556/MR223 HK G36/SL8 B&T APC223 AR-15/M16 Any 1/2x28 threaded barrelHKP-21506$115.00 -
H&K HK MR556/MR762/417 Index Pin Spring
H&K Heckler & Koch
$7.95H&K HK MR556/MR762/417 Index Pin Spring Compatible With: HK MR556 HK 417 HK MR762HKP-17021$7.95 -
H&K Trigger Pack Housing - Semi 0,1
H&K Heckler & Koch
$129.95H&K 2 Position (0,1) Semi-Auto Trigger Pack Housing This trigger pack housing is professionally converted to semi-auto with all legal and correct modifications, including a semi-sear hole and trigger stop. It is designed to provide reliable...HKP-02177$129.95 -
Out Of Stock
HK MR556 Eyelet Sling Adapter
HKP HK Parts
$89.95HK MR556 & MR762 Eyelet Sling Adapter for Carrying Sling New eyelet sling adapter for carrying slings. The perfect option for those who want to match their RAL8000 or tanodized handguards. These sling adapters are made in the USA, so you know...HKP-21064-M$89.95 -
Out Of Stock
PWS Keymod Bipod Adapter for Harris Style Bipods
PWS Primary Weapon Systems
$21.95Keymod Bipod Adapter for Harris Style Bipods The Harris Style Bipod Mount is quick to install and easy to use. Fits snug to your KeyMod or PicMod handguard and ensures a stronghold on your Harris Bipod.HKP-19272$21.95 -
B&T HK MR556/MR762/416/417 Brass Catcher
B&T Brugger & Thomet
$289.95B&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-16899$289.95 -
$19.95 -
HKP HK MR556/CR556/MR762 H-Key 17 Rail Segment
HKP HK Parts
$44.95HK MR556, CR556 & MR762 HKey Rail Segment - 17 Slot 17 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...HKP-17847$44.95 -
Kinetic Development Group Sidelok Modular Optic Mount - 30mm
$224.95Kinetic Development Group Sidelok Modular Optic Mount - 30mm The new KDG Modular Optic Mount is based off the proven Sidelok family of quick detach optic mounts and features the same user-friendly, tool-free design. KDG set out to design a Sidelok mount...HKP-19062$224.95 -
Out Of Stock
Nefarious Arms HK 416/MR556 14.5" A5 Barrel
Nefarious Arms
$694.95Nefarious Arms HK 416/MR556 14.5" A5 Barrel Each Nefarious Arms barrel is cold-hammer-forged and chrome-lined for years of accurate shooting. Grab this expertly crafted barrel for your next SBR or pistol build. Compatible With: HK 416 (A5,...HKP-21590$694.95 -
On Sale
Picatinny to Harris Bipod Adapter - Universal
HKP HK Parts
Now: $14.95Was: $33.95Harris Bipod Adapter This mounts to any Picatinny rail and proves a stable platform to add a Harris bipod or other similar-mounting bipods. This will fit any Picatinny spec rail or rail system. Made in the US out of aircraft-grade aluminum and...HKP-21528Now: $14.95Was: $33.95 -
B&T Blast Deflector - A2 NATO Interface
B&T Brugger & Thomet
$300.00B&T Blast Deflector - A2 NATO Interface This blast deflector is designed for NATO style A2 ("birdcage") flash hiders. Offering a universal fit for 5.56 rifles featuring the standard A2 flash hider. It directs muzzle blast forward, preventing...HKP-21777$300.00 -
Out Of Stock
B&T Vertical Fixed Unigrip - Black
B&T Brugger & Thomet
$90.00B&T Vertical Fixed Unigrip - Black Swiss made B&T vertical for-end grip for picatinny. Made of aluminum Will fit all mil-spec picatinny rails. Measures long. Specifications: Condition: Factory new Color: Black Material: Polymer/alloyHKP-18043$90.00 -
Out Of Stock
H&K HK 416 A5 & 417 Universal Tool
H&K Heckler & Koch
$114.95H&K HK 416/417 A5 Universal Tool Genuine HK multi-tool for the 416 A5 and 417. Perfect tool for bench or field use. Conveniently fits inside the 416 combat grip. Compatible With: HK 416 A5 HK 417HKP-21621$114.95 -
Out Of Stock
H&K HK MR556/MR762/416 Buttstock Locking Bolt
H&K Heckler & Koch
$0.00H&K HK MR556/MR762/416 Buttstock Locking Bolt Compatible With: HK MR556 HK 416 HK MR762HKP-16845$0.00 -
KDG HK MR556 13.75" M-LOK Rail System - FDE
KDG Kinetic Development Group
$399.95Rail System - 13.75" - Brown - M-LOK - HK MR556 The New KDG HK 556 M-LOK rails are direct mount rail system, replacing the factory HK 556 rail systems. These new rails are identical in design to their big brother, the KDG HK 762 M-LOK Rail system. Like...HKP-19243$399.95 -
MI HK MR556/416 M-LOK Compatible 13.5" Carbine Handguard
MI Midwest Industries
$269.74MI HK MR556/416 M-LOK Compatible 13." Carbine Handguard Features: Made in the USA Simple installation, direct replacement for HK factory handguard Retains factory barrel nut Mil-spec top rail Seven sides of M-LOK compatible slots Lightweight, rugged...HKP-18437$269.74 -
Out Of Stock
H&K 416A5 RAL 8K Stripped Upper Receiver
H&K Heckler & Koch
$0.00HK German Un-Assembled Stripped HK 416A5 Upper Receiver - RAL 8K Brand new factory German RAL 8000 416A5 upper receiver. Compatible With: HK MR556 HK MR223 HK 416 Looking for a matching lower for your build? STS416 A5 LOWER - Specialized Tactical...HKP-18787$0.00 -
H&K CR556/CR762 5-Rail Segment - Black
H&K Heckler & Koch
$39.95HK MR556, CR556 & MR762 & CR762 Rail Segment - 5 Rail ASM New Factory HK 5 slot rail segment for the CR style HKey mod rail forearms. Compatible With: CR556 MR556 (with HKey handguard installed) CR762 MR762 (with HKey handguard installed) HK MP5...HKP-17510$39.95 -
Out Of Stock
HKP HK 416 Upper Receiver
HKP HK Parts
$489.95US Made 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 416 Need a...HKP-17783$489.95 -
Out Of Stock
Kinetic Development Group Sidelok Aimpoint Micro Mount - HK logo
KDG Kinetic Development Group
$138.95Kinetic Development Group Sidelok Aimpoint Micro Mount - HK logo The Sidelok is a revolutionary new mounting system for optics. The patented cam system locks the mount down onto Picatinny without the need of tools, side levers, or huge knobs. The release...HKP-19065$138.95 -
On Sale
Magpul M-LOK Bipod Mount
Magpul
Now: $19.95Was: $29.95Magpul M-LOK Bipod Mount The Magpul M-LOK Bipod Mount allows for the attachment of Harris®-style stud mounted bipods to M-LOK compatible hand guards and forends. The M-LOK Bipod Mount offers a low-profile, robust, and elegant mounting solution for...HKP-17269Now: $19.95Was: $29.95 -
Out Of Stock
Magpul MOE Stock - Commercial Spec, AR15/M4 Carbines
Magpul
$54.95Magpul MOE (Magpul Original Equipment) Commercial-Spec Model for AR15/M4 Carbines Made in the USA, the MOE stock Commercial-Spec Model is a drop-in replacement buttstock for AR15/M4 carbines using commercial-spec-sized receiver extension tubes. The...HKP-10629$54.95 -
B&T Unigrip Fixed With Storage Compartment - FDE
B&T Brugger & Thomet
$69.95B&T Vertical Grip - Fixed Style With Storage Compartment - TAN Swiss made B&T vertical for-end grip for picatinny. Made of tan polymer and includes a water tight storage compartment in the bottom of the grip. Will fit all mil-spec picatinny rails...HKP-18042$69.95 -
On Sale
B&T Unigrip QD with Bipod - Aluminum
B&T Brugger & Thomet
Now: $199.95Was: $224.99B&T Unigrip QD with Bipod - Aluminum This B&T foregrip features a retractable bipod for superior weapon stability in both the standing and prone positions. Specifications: Condition: Factory new Material: Aluminum Heat deflection...HKP-21596-MNow: $199.95Was: $224.99 -
Out Of Stock
Geissele HK 416 10.5" M-LOK Handguard - Black
Geissele
$499.95Geissele HK 416 10.5" M-LOK Handguard - Black The super modular rail HK416 MK15 M-LOK was designed to replace the standard rail on an HK416 or MR556 weapon platform. The rail system utilizes the stock HK barrel nut, but incorporates the strength,...HKP-20327$499.95 -
H&K German Leather Sling - Well Used with No Loop
H&K Heckler & Koch
$39.80Original Surplus German HK Leather - Well Used with No Loop Pulled from German military G3 rifles. Last of the remaining units, get them before they are gone. Compatible With: HK91 G3 PTR91 & CETMEHK93 33 53HK94 MP5HK clones Other custom...HKP-20583$39.80 -
On Sale
H&K HK 416 A5 Bolt Carrier Complete
H&K Heckler & Koch
Now: $1,945.00Was: $2,349.95German H&K HK 416 A5 Bolt Carrier Complete Get your hands on that critical puzzle piece for your factory-correct 416A5 build. Fully assembled and ready to drop into your uper receiver. Bolt carriers may be marked ".223 Rem" or "5.56 x 45"...HKP-21500Now: $1,945.00Was: $2,349.95 -
Out Of Stock
H&K HK MR556/416 Steel Maritime Magazine Follower
H&K Heckler & Koch
$14.95H&K HK MR556/416 Steel Maritime Magazine Follower Compatible With: HK 416 factory magazines such as 30, 20 and 10 roundHKP-15452$14.95