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 G36 (5.56/.223) 4 Position Retractable Stock - Folding
H&K Heckler & Koch
$349.95HK G36, G36k, G36C, & SL8 Conversion Rear Stock Assembly The G36 KV stock, as it is known, was built by HK for a military contract and is built HK tough with an overall length of 8.5 inches (fully collapsed) to 11.40 inches when fully extended. Each...HKP-02682$349.95 -
H&K HK MR556/416 E1 Charging Handle
H&K Heckler & Koch
$129.95HK MR556 & 416 E1 Charging Handle - Ambidextrous HK's design boasts a smooth & easy to release latch with an enhanced oversized charging handle. Compatible With: HK MR556 HK 416 Other AR15, M4 & M16 applicationsHKP-01959$129.95 -
H&K HK MR556/416 Handguard Rail System Screw
H&K Heckler & Koch
$29.95HK MR556 & HK 416 Handguard Rail System Screw This is the hex head version for any metric Allen hex head that can be utilized to tighten and release the screw pressure. This can also be used to replace the rail screw on...HKP-02717$29.95 -
H&K G36/SL8 (5.56/.223) Bolt Head Ejector Pin
H&K Heckler & Koch
$7.95Bolt Head Ejector Pin For G36 & SL8 This item is the pin that holds the ejector & ejector spring in place. It is a common wear and replacement item and a must-have when doing bolt head maintenance.HKP-01876$7.95 -
H&K G36/SL8 (5.56/.223) Sight Rail With Front & Rear Sights
H&K Heckler & Koch
$289.95H&K German G36 & SL8 Picatinny Sight Rail With Front And Rear Iron Sights Each rail works well with optics such as Eotech or Aimpoints. This is also a great part if you want a lower cheek weld and low-profile sight system. Made from durable...HKP-00274$289.95 -
H&K HK 416/MR556 Mil-Spec Factory German E2 Rear Stock - Black
H&K Heckler & Koch
$199.95HK 416, MR556 Factory German E2 Rear Stock The HKE2 Buttstock fits MILSPEC buffer tubes (receiver extensions) for M4/AR15 type weapons and has the concave style removable buttpad installed. Features: Ergonomic cheek weld for improved firing position Two...HKP-01913$199.95 -
HK UMP & G36 Pistol Grip Storage Insert
USA
$16.95HK UMP & G36 Pistol Grip Storage Insert G36 & UMP pistol grip insert for all G36 & UMP lower housings. This is the piece that locks into place and fits in the bottom of the handle itself. This is a perfect storage location for paperwork,...HKP-20176$16.95 -
H&K HK MR556/416 Bolt Catch Pin
H&K Heckler & Koch
$4.95HK MR556 & HK 416 Bolt Catch Pin The factory roll pin is used to hold the bolt catch in place. Great to have on hand in the event this item becomes lost or damaged when doing maintenanceHKP-02677$4.95 -
H&K HK SL8, HK G36 Extended Bottom Rail Kit - Black
H&K Heckler & Koch
$99.95H&K HK SL8, HK G36 Extended Bottom Rail Kit - Black This rail is the factory correct HK German manufactured bottom rail for the G36 or SL8 rifle. This allows the longest rail on the bottom of the polymer forearm. 9.25" in length overall. Comes with...HKP-16549$99.95 -
HK G36/SL8 (5.56/.223) Extractor Axle
$6.95HK G36, SL8 Extractor Axle- US Made New extractor axle for use on all G36, Sl8 bolt heads. This part can become heavily worn and is prone to breakage. Compatible With: HK G36 models HK Sl8 modelsHKP-18370$6.95 -
HKP HK MR556/416 Buffer Tube Wrench
HKP HK Parts
$29.95HK MR556 & HK416 Buffer Tube Wrench The perfect metric wrench to remove and install the MR556 & HK 416 castle nuts on the buffer tube. A perfect addition to have on hand for OTB or other HK buffer tube upgrades, etc. Made from all steel, heat...HKP-17124$29.95 -
HK MR556/416 10.5" Super Modular Rail System - Black
Geissele
$459.95Geissele HK416, MR556 10.5" Modular Rail - Black 9.7 " Extended free float rail for use with all HK 416 & MR 556 barrels. Please note: On the HK416 models the sling attachment point on the gas block will need to be removed to allow the handguard to...HKP-16459$459.95 -
$8.95 -
H&K HK MR556, HK 416 A5 Enhanced Incomplete Trigger Guard
H&K Heckler & Koch
$39.95Enhanced HK Trigger Guard Upgrade Incomplete - A5 - HK 416 & HK MR556 Never offered before! Now you can upgrade your MR556, 416 & CR556 to the latest Gen HK 416 A5 Enhanced Trigger Guard. Enlarged trigger guard area to use with gloves...HKP-19377$39.95 -
H&K HK MR556/416 Magazine Release Button
H&K Heckler & Koch
$16.95HK MR556 & HK 416 Magazine Release Button New HK German Manufacture. Compatible With: HK MR556 HK416 AR15, M4 & M16 firearmsHKP-02656$16.95 -
HK G36K/G36C Tri Rail Set Complete - Black
UTG
$64.95HK G36C, G36K, & G36 .22LR Bottom & Side Rail Set Universal Picatinny mounting rail system, mounting screws, and hex wrench. This system includes the bottom, left, and right side tactical rails (3 rails total). This set of rails will fit all HK...HKP-00272$64.95 -
H&K 30 Round HK MR556/K416 Magazine Spring
H&K Heckler & Koch
$12.95HK German HK MR556 & HK 416 Magazine SpringHKP-13483$12.95 -
H&K HK MR556/416 Extractor Axle Pin
H&K Heckler & Koch
$11.95HK MR556 & 416 Extractor Axle Pin This factory HK German part holds the extractor in place on the bolt head. This item needs to be changed each time it is removed per HK. Compatible With: HK 416 MR556 M27 HK 416 A5HKP-00040$11.95 -
HK 53 (5.56 / .223) Recoil Assembly Complete
HKP HK Parts
$44.95HK53 Recoil Assembly US manufactured with just the right mixture of US and German components. Each uses a micro polished recoil rod with serviceable end caps that can be taken on and off for spring replacement. Each recoil assembly features a factory...HKP-16752$44.95 -
On Sale
Magpul PMAG 20 Round AR-15 5.56 / .223 Magazine
Magpul
Now: $9.99Was: $12.95Mapul PMAG 5.56/223- 20 Round - M3 This magazine is the latest and greatest M3 model NON-windowed 20 round PMAG (Polymer Magazine) is a lightweight 5.56 NATO, M-16 compatible magazine. It features a pop-off storage/dust cover that alleviates pressure...HKP-16475Now: $9.99Was: $12.95 -
G36E Bayonet Lug Assembly HK German
H&K Heckler & Koch
$89.95HK German Factory G36E Bayonet Lug Rare and hard to find. The inside diameter (ID) is 16mm in size. A great alternative for those that do SL8 conversions as well as M27 look clone barrel conversions. You will need the G36 bayonet lug roll pin as it...HKP-00354$89.95 -
Geissele HK 416 Trigger
Geissele
$529.95HK 416 SSF Trigger- Geissele This is the newer production Generation II trigger kit. Compatible With: HK 416 Select Fire full auto firearms Each Trigger comes with full installation instructions Please note: After installing the MR556 trigger you must...HKP-16477$529.95 -
German HK 416, MR556 - Barrel Nut
H&K Heckler & Koch
$45.00HK MR556 & HK 416 Barrel Nut Or Socket For Barrel All steel barrel nut. This item is a 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...HKP-02535$45.00 -
GSG9 HK G36C Gas Piston Rod Spring Assembly - Black
GSG9
$82.95HK German G36C Gas Piston Rod & Spring Assembly Complete A must have item for HK G36C conversions from SL8's or for spares for your G36C MG. A high wear and replacement part and a must have for spare parts.HKP-18250$82.95 -
H&K G36K Gas Piston Rod/Spring Assembly
H&K Heckler & Koch
$89.95New HK German G36K Gas Piston Rod/Spring Assembly Great for spare parts or to use on that HK Sl8-G36 conversion.HKP-00284$89.95 -
H&K HK 416/MR556 Quad Rail
H&K Heckler & Koch
$419.95Quad Rail - HK 416, MR556 HK German 416, MR556 Quad Rail without mounting screw. Compatible With: MR556 HK416 Specifications: Length: 9 1/4" Color: Charcoal grayHKP-16858$419.95 -
H&K HK G36, HK SL8 Ambidextrous Sling Pin
H&K Heckler & Koch
$49.95HK German G36/SL8 Ambidextrous Sling Pin This part replaces all of the HK SL8 or G36 push pins with a loop for the sling. This can be moved to attach a sling on either the left or right sides with ease.HKP-00619$49.95 -
HK G36, SL8 Fixed Sights & Optic Rail
USA
$199.95HK Sl8, G36 Sight Rail With Front & Rear Fixed Sights US made HK HK Sl8, G36 Picatinny Rail with fixed iron sights. Comes exactly as shown with no mounting hardware. Compatible With: HK SL8, HK Sl8-1 G36, G36K, G36CHKP-19717$199.95 -
GSG9 HK G36, HK G36K Folding Stock - Black
GSG9
$115.00HK G36 Full Length Stock HK G36 10.5" Stock complete for G36 firearms. The G36/G36K stock is the longest stock option for the G36 family of firearms. For those that would like a shorter stock choose the G36C length stock. Each stock comes complete with...HKP-18219$115.00 -
H&K HK MR556/416 Cam Pin
H&K Heckler & Koch
$31.95Bolt Head Cam Pin- MR556, HK 416 New factory HK German manufactured cam pin for bolt group. A common wear and replacement item. Compatible With: HK 416 HK MR556 HK M27 HK 416 A5HKP-02539$31.95 -
H&K HK MR556/416 Right or Left Side Safety Selector
H&K Heckler & Koch
$39.95HK German MR 556 & HK 416 Safety Lever- Right Or Left Side: HK German manufactured right or left side selector lever for the ambidextrous controls of the HK 416, MR556 family of firearms. Will work for both semi and select fire models. Each set will...HKP-15250$39.95 -
H&K 93/53/33 (5.56 / .223) Firing Pin Spring
H&K Heckler & Koch
$9.95New HK German 93, 33, & 53 .223/5.56 Firing Pin Spring. A must-have spare part as this is a high wear and replacement item. Compatible With: HK93 HK33 HK53 V93/V53, C93, C53 Custom builds and clonesHKP-00193$9.95 -
H&K HK 416/MR556 Trigger Guard Assembly
H&K Heckler & Koch
$54.95HK MR556 & HK 416 Trigger Guard Assembly New HK German part that protects the trigger from an accidental discharge. Compatible With: HK 416 HK MR556HKP-02545$54.95 -
H&K HK G36 15.4" CQB Barrel Assembly - Black
H&K Heckler & Koch
$1,095.95Factory German HK G36 CQB Barrel Assembly - New Brand new HK German cold hammer forged barrel assembly, date coded, uninstalled & unfired in the factory wax paper wrapping. This is a one time offering never to be available again. Each barrel assembly...HKP-17026$1,095.95 -
H&K HK G36, HK G36K Full Size Folding Stock - Black
H&K Heckler & Koch
$139.95HK G36 or G36K Folding Stock HK G36 Stock complete for full-size G36 rifles. This is the longest stock available for G36 rifles. This is also the standard G36 and G36K stock with the standard length.HKP-00277$139.95 -
H&K HK G36/SL8 Sling - Black
H&K Heckler & Koch
$79.95HK German G36 & SL8 Tactical Sling - BlackHKP-02381$79.95 -
MKE 93/53/33 (5.56 / .223) - A3 Retractable Stock
MKE
$399.95HK 93, 33, 53 & Z43 - A3 Stock - Black Cerakote New HK MKE latest generation A3 retractable stock started off with an O.D Green rear stock section color. We took this factory O.D Green stock and had it professionally Cerakoted in black for those...HKP-21287$399.95 -
Tommy Built G36 AR/Stanag Magwell - Black
Tommy Built
$249.95Tommy Built G36 AR/Stanag Magwell - Black Stanag/AR Magwell for the G36/SL8 Platform. This replacement magwell allows the use of standard AR15 Style Magazines. This is a direct magwell swap and should not require any modification or special tools. These...HKP-19171$249.95 -
Out Of Stock
HK G36 Backplate w/ Recoil Buffer
USA
$44.95HK G36 Backplate With Recoil Buffer New G36 Backplate with new G36/SL8 recoil buffer. This is a great spare or replacement to have on hand. These are also required for those that are doing the SL8-G36 conversions provided by Tommy Bostic & Chopstix...HKP-18538$44.95 -
HK G36/SL8 (5.56/.223) Ejector Spring
USA
$19.95HK G36 & SL8 Series Of Ejector Spring. Great item to have on hand as this is prone to wear and breakage- US.HKP-18374$19.95