All Parts
At HK PARTS, we bring you a wide array of high-quality H&K accessories and components for your favorite firearms. Whether you're upgrading your H&K pistol or rifle, or even looking for parts kits, we've got you covered. Discover a range of top-rated components for popular models like VP9, USP, P30, MP5, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, we have it all. Enhance your firearm's performance and functionality with our premium components.
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H&K HK G3, HK 91 Grip for Metal Frames - OD Green - Surplus
H&K Heckler & Koch
$9.95HK German Green Plastic Grips For The HKG3,HK91 & HK93, HK33 Metal Grip Frames. Used in surplus condition. Each item is used in good shape and will clean up nicely with a little bit of TLC and some attention. A great value for the price. Fits all HK...HKP-16333$9.95 -
H&K 30 Round HK MR556/416 5.56/.223 Maritime Magazine - Black
H&K Heckler & Koch
$59.00HK 416, MR556 30 Round Maritime Magazine - German HK The HK 416 and MR556 magazines will also fit all AR15/M16 variants. Designed to provide optimum ammunition feeding for any M16/M4/AR15-type weapon. Originally developed by HK for the British L85 (SA80)...HKP-00487$59.00 -
H&K G36 (5.56/.223) 30 Round Magazine - Black
H&K Heckler & Koch
$49.95HK German G36 30 Round Magazine The new HK German 30-round magazine fits all G36, G36K, and G36C variants & converted SL8's with the G36 mag well—factory fresh latest HK manufacture.HKP-00624$49.95 -
On Sale
Magpul AR-15 PMAG 30-Round 5.56 / .223 Magazine
Magpul
Now: $8.95Was: $14.95Magpul Original Equipment (MOE) is a line of firearm accessories designed to provide a high-quality, economical alternative to standard weapon parts. The MOE line distinguishes itself with a simplified feature set, but maintains Magpul engineering and...HKP-14559Now: $8.95Was: $14.95 -
H&K HK 93/53/33 (5.56 / .223) 30 Round Magazine - Steel
H&K Heckler & Koch
$80.00HK93, HK33, & HK53 - 30 Round Magazine HK Factory German. All-steel latest production magazine and hard to find. This magazine was discontinued in 2021 and is no longer in production. Stock up as we have the last remaining units available...HKP-00484$80.00 -
H&K HK MR556/416 Gas Block Roll Pin
H&K Heckler & Koch
$7.95HK 416 & MR556 Gas Block Pin This is the retaining pin for an HK 416 gas block. A must-have, as HK recommends using new pins once they are removed or damaged. Size: 5 x 18 mm.HKP-02534$7.95 -
H&K HK MR556/416 Enhanced Buffer Spring
H&K Heckler & Koch
$19.95Enhanced HK German MR556 & 416 Buffer Spring The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. This is the finest AR15 style buffer spring available. A high wear item and a must have replacement part. Compatible...HKP-00039$19.95 -
Magpul PMAG 30 Round AR-15 5.56 / .223 Magazine-Windowed
Magpul
$15.95The Gen M3 PMAG is a 30-round 5.56x45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. Modified internal and external geometry also permits operation with a wide range of non Colt-spec platforms such as the HK 416 and MR556A1,...HKP-16441$15.95 -
HKP HK G36/SL8 (5.56/.223) Bottom Rail - 6 inch
HKP HK Parts
$27.95G36 & HK SL8 6" Bottom Rail Fits the SL8 and G36 full-size forearms. This item is just over 6" in overall length and is made from aircraft-grade aluminum. Comes with the screws needed for installation. From the center of the screw holes, there are...HKP-00285$27.95 -
Out Of Stock
H&K SL8 (5.56/.223) 10 Round Factory Magazine
H&K Heckler & Koch
$56.95HK German 10-Round Magazine For The SL8-1 & SL8 Firearms. Made in Germany and factory fresh.HKP-00276$56.95 -
H&K Rear Sights Windage Screw - HK 90 Series
H&K Heckler & Koch
$4.95H&K Rear Sights Windage Screw - HK 90 Series This is a hard-to-find rear sight screw new from HK Germany - not surplus.HKP-00867$4.95 -
H&K HK MR556/416 Backplate w/ Sling Loops
H&K Heckler & Koch
$46.95HK 416, MR556 Ambidextrous Sling Loop BackplateGenuine HK German manufactured 416, MR556 new style backplate with sling loop.Fits the following: HK MR556, HK 416 buffer tubes All Standard AR-15, M4 & M16 buffer tubesHKP-17151$46.95 -
H&K HK MR556/416 Tungsten Recoil Buffer
H&K Heckler & Koch
$76.95H&K HK MR556 & 416 Tungsten Recoil Buffer The proprietary tungsten HK-manufactured buffer is one of the reasons why the HK 416 and MR556 are as reliable as they are. This is the perfect addition to all AR/M16 uppers. Compatible With: HK...HKP-00041$76.95 -
Out Of Stock
H&K HK MR556/416 Ejection Port Cover - RAL 8K
H&K Heckler & Koch
$59.95HK German HK 416, MR556 Ejection Port Cover In RAL8000 HK 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 build with the finest ejection port...HKP-18062$59.95 -
H&K HK MR556/416 14.5"/16.5" Rear Diopter Sight
H&K Heckler & Koch
$199.95H&K HK MR556 & 416 14.5"/16.5" Rear Diopter Sight HK German Rear Diopter Sight is the proper rear sight to pair with all HK 416 14.5, and MR556 uppers and rifles. This sight can be paired with a fixed front sight or folding front sight.HKP-00027$199.95 -
HKP HK SL8 & HK G36 Top Rail Screw
HKP HK Parts
$5.95HK SL8 & G36 Top Rail Screw This rail screw is the standard length rail screw used for all SL8 and G36 top rails. With the exception of the dual and single option models. A must have part and an easy part to loose or strip. Grab yours to have...HKP-20330$5.95 -
HKP HK MR556/416 Handguard Rail System Hex Screw
HKP HK Parts
$9.95HK416, MR556 Replacement Handguard Rail Screw - Hex- Stainless SteelHex head replacement handguard retension screw for your HK416, MR556 forearm. Made in the USA from 17-4 SS with a 5mm hex head for ease and use when installing and taking off the...HKP-17657$9.95 -
H&K HK SL8, HK G36 Extended Mag Release
H&K Heckler & Koch
$49.95HK Sl8 & G36 Oversized Extended Mag ReleaseNew HK German Sl8, G36, HK243 extended magazine release. A must have upgrade for your HK SL8, Sl8-G36 conversion or G36 firearm. The HK extended magazine release is a drop in replacement and requires zero...HKP-17720$49.95 -
H&K G36/SL8 (5.56/.223)Forearm, Lower, Magwell - Push Pin
H&K Heckler & Koch
$34.95New HK German G36 & HK SL8 Push Pin For Forearm, Mag Well Or Lower Each push pin is a factory German part and is new. This is also required for those doing the SL8 to G36 style conversions. A factory German G36 uses three of these factory push pins...HKP-00804$34.95 -
H&K 93/53/33 (5.56 / .223) Factory Correct Ejector Lever
H&K Heckler & Koch
$59.95HK German Factory 93, 33, 33K, 53 & 300 Blackout Ejector Lever New 2nd generation latest design upgraded German factory correct ejector lever. This is the latest design with all the improvements for use in all the various models and styles of 556/223...HKP-00191$59.95 -
H&K HK 416 10.5" Rear Diopter Sight Assembly
H&K Heckler & Koch
$224.95HK German 416 10.5 Rear Diopter Sight Assembly This is the proper rear sight for use on all HK 416 10.5 uppers and firearms. This is also a great sight alternative for those who need a lower sight setup for the AR, XCR, etc. To be used in conjunction...HKP-01109$224.95 -
H&K 30 Round AR-15 5.56 x 45mm / .223 Magazine - Tan
H&K Heckler & Koch
$99.9530 Round Magazine with Window - Sand Tan - Gen 3 - Heckler & Koch Factory German Heckler & Koch 30-round Gen 3 polymer magazine. Compatible With: HK416 MR223 MR556 AR15 M16 M4 type rifles.HKP-19358$99.95 -
On Sale
Magpul 30 Round AR-15, HK MR556, HK 416 PMAG M3 Magazine
Magpul
Now: $12.95Was: $18.95Magpul 30 Round AR-15, HK MR556, HK 416 PMAG M3 Magazine This magazine is the latest and greatest M3 model - NON-windowed PMAG (Polymer Magazine) and is a lightweight 5.56 NATO, M-16 compatible magazine. It features a pop-off storage/dust cover that...HKP-00639Now: $12.95Was: $18.95 -
H&K HK G3, HK 91 Grip for Metal Frames - Black - Surplus
H&K Heckler & Koch
$7.95HK German Black Plastic Grips For The HKG3,HK91 & HK93, HK33 Metal Grip Frames. Used in surplus condition. Each item is used in good shape and will clean up nicely with a little bit of TLC and some attention. A great value for the price. Fits all HK...HKP-16207$7.95 -
Out Of Stock
H&K HK G36/SL8 Bipod - Black
H&K Heckler & Koch
$0.00New HK G36 & HK SL8 Factory Bipod Heckler & Koch German made. Manufactured with steel-reinforced HK composites. Compatible With: HK G36 HK SL8-6 Newer black rifles or the SL8-1 with a proper forearm HK G36K - Must be an early style that has a...HKP-00270$0.00 -
Out Of Stock
H&K HK MR556/416 Mil-Spec German E1 Rear Stock - Black
H&K Heckler & Koch
$0.00H&K HK MR556 & 416 Mil-Spec German E1 Rear Stock - Black The HK E1 Buttstock fits MILSPEC buffer tubes (receiver extensions) for M4/AR15-type weapons. Each stock comes with the convex buttpad as found on factory-issued HK 416s. Compatible...HKP-00052$0.00 -
HK G36/SL8 (5.56/.223) Barrel Wrench
$129.95Barrel Wrench HK SL8 & G36 It will fit everything from the 9" G-36C to the 20" SL-8. The wrench features 3 points of contact to ensure maximum connection and maximum torque to the barrel nut. It also features a 3/8" drive socket to allow loosening...HKP-00283$129.95 -
HKP HK G36, SL8 Forearm, Lower, Magwell U.S Push Pin - Black
H&K Heckler & Koch
$18.95HKP HK G36, SL8 Forearm, Lower, Magwell U.S Push Pin - Black U.S G36 push pin. Black oxide for the best looking finish. This push pin is also required for those doing the SL8 to G36 Style Conversions. A factory German G36 uses three of these factory push...HKP-20730$18.95 -
Out Of Stock
H&K 53/51 (5.56 / .223) Handguard
H&K Heckler & Koch
$59.95HK German Correct Length HK 53, 51 & PTR Forearm New factory fresh HK German manufacture HK53 hand guard. Polymer handguard that is the proper length to cover the extended portion of the trunion found on the HK53 and HK 51 style of firearms...HKP-00468$59.95 -
H&K HK MR556/416 Ejection Port Cover Door Assembly
H&K Heckler & Koch
$51.95HK German HK 416, MR556 Ejection Port Cover Door Assembly Complete This is the newer polymer style cover found on the latest HK 416 and MR556's. This is the complete ejection port door assembly needed on all AR15 or MR556/HK416 models. Can also be used...HKP-16951$51.95 -
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 -
HKP HK MR556/416 Bench Mat
HKP HK Parts
$24.95HK MR556, HK 416 Bench MatOur HK MR556, HK416 bench mat is the perfect cleaning & repair mat designed specifically for your Heckler & Koch MR556 & HK416 models. Have fun and learn while you work on your favorite H&K firearm. The soft top...HKP-17169$24.95 -
GSG9 HK G36 Mag Well - Black
GSG9
$58.95HK G36 Magazine Well Allows Use Of All factory G36 & Magpul G36 Magazines. Fits all 30 round, 10 round & 100 round magazines & drums. Made from high impact polymer. HK G36 HK G36K HK G36C Clones or other customer buildsHKP-18220$58.95 -
H&K HK 416/MR556/MR762 Trigger Guard Pin
H&K Heckler & Koch
$3.95HK MR556, 416 Trigger Guard Retaining Pin HK 416 HK MR556HKP-02678$3.95 -
Out Of Stock
HKP Piston 3-Ring Replacement Set
H&K Heckler & Koch
$0.00HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common breakage parts we see that need to be replaced on these...HKP-00048$0.00 -
Magpul 30 Round HK G36 5.56/.223 Magazine - Black
Magpul
$29.95PMag 30G Maglevel For The G36 Variants The PMAG 30G Maglevel (5.56 NATO / .223 Remington) is a durable, lightweight, highly reliable 30-round polymer magazine for the HK G36 series of firearms. Including the SL8 conversions that now use G36 magazines...HKP-01740$29.95 -
Out Of Stock
H&K HK MR556/416 Extended 11" Quad Rail - Black
H&K Heckler & Koch
$387.95HK MR556/416 Extended 11" Quad Rail - Black This drop-in unit offers two full inches in extra length, not the standard 9" rail that comes with the HK 416/MR556, but an extended 11" rail that allows for a longer sight radius and more rail space...HKP-01960$387.95 -
HK G36, HK SL8 Side Rail Factory HK - Black
H&K Heckler & Koch
$67.95HK Factory German G36 & SL8 Side Rail With Screws Up to two side rails can be used on a G36 UMP, one for each of the sides. Made from hard coat anodized aluminum. Compatible With: SL8 full size G36 full sizeHKP-01962$67.95 -
HK G36/SL8 (5.56/.223) Barrel Mandrel
$99.95Barrel Mandrel For Removal & Installation of HK G36 & SL8 Barrels The mother of invention comes the state-of-the-art H&K SL-8 and G-36 barrel wrench. Will fit everything from the 9" G-36c to the 20" SL-8. The barrel mandrel...HKP-02608$99.95 -
H&K HK G36C Rear Stock With Cheek Rest - Black
H&K Heckler & Koch
$199.95HK G36C Rear Stock With Cheek Piece Installed - German Genuine German Heckler & Koch G36 stock. The G36C stock is a full inch shorter than a standard G36 stock. This is an ideal stock for those wearing body armor, for those who are doing the SL8...HKP-00278$199.95