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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Tapco HK 416/MR556/AR15 Stock Wrench
Tapco
$32.95Tapco HK 416, MR556, & AR15 Stock Wrench This tool includes a Mil-Spec castle nut wrench, a standard-length receiver extension removal wrench, and an A1/A2 Flash Suppressor wrench. This offers an improved grip, and each tool has a...HKP-02407$32.95 -
AIM HK 93/33 (5.56 / .223) Carbine Length Handguard - MLOK
AIM
$85.95HK 91, PTR RIFLE LENGTH HANDGUARD - M-LOK This sleek streamlined design is an ultra low profile handguard with generous mounting space to accept all M-Lok accessories. Superior ergonomics and simple, drop-in installation makes this the best HK pattern...HKP-18177$85.95 -
DTAC HK93/33/G3K M-LOK Modular Handguard
$189.95DTAC HK93/33/G3K M-LOK Modular Handguard Our Modular Handguard System is packed full of features, taking your roller-lock firearm to the next level of versatility. Features: Made in the USA (922R compliant part) M-LOK accessories compatible 25...HKP-20015$189.95 -
Out Of Stock
Geissele HK 416 Super Modular M-LOK 14.5" Rail - DDC
Geissele
$549.9514.5" HK416 Super Modular Rail M-LOK The Super Modular Rail HK416 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, rigidity and...HKP-19808$549.95 -
GSG9 HK SL8, HK G36 Magazine Release Spring
GSG9
$4.95HK G36 & SL8 Magazine Release Spring - USA Mag release spring for all G36 & Sl8 models. A must have spare part. Made in the USA. G36 G36K G36K SL8 Other custom G36 type buildsHKP-18254$4.95 -
H&K G36/SL8 (5.56/.223) Factory Recoil Buffer
H&K Heckler & Koch
$20.95HK G36 Or SL8 Factory Recoil Buffer A must-have spare part. These are prone to wear, tear, and damage.HKP-00290$20.95 -
Out Of Stock
H&K HK 416 Ejector Retaining Pin
H&K Heckler & Koch
$0.00HK 416 Ejector Retaining Pin This factory HK German part is the pin that holds the ejector in place on the bolt head. Great to have as a spare part.HKP-00053$0.00 -
H&K HK 416 Factory Retractable Stock - Black
H&K Heckler & Koch
$129.95HK 416 & AR15 6 Position Retractable Stock New HK Marked 6 position AR15 commercial stock. This stock fits all commercial AR-15/M16 buffer tubes. The stock telescopes expands and retracts to 6 locked positions. Marked with the HK logo and...HKP-00049$129.95 -
H&K HK 416 Flip Up Rear Sight- 3mm
H&K Heckler & Koch
$299.95HK 416, MR556 & 417 Flip Up Rear Sight (Diopter 3mm Sight) Attaches to any standard Picatinny rail. No hardware is needed as this is a self-contained quick-attach rear sight assembly. This unique HK-designed sight features a quick & easy push...HKP-01405$299.95 -
H&K HK MR556/416 Roll Pin for Charging Handle
H&K Heckler & Koch
$7.95HK Clamping Sleeve or Roll Pin for Pawl On Charging Handle This is the longer one that is used on the outside of the charging handle. There are one of these pins used per charging handle.HKP-17063$7.95 -
H&K HK MR556/CR556 Complete Bolt Group
H&K Heckler & Koch
$684.95HK MR556 Complete Bolt Group Bolt carriers will be marked ".223 Rem" or "5.56 x 45". Includes The Following HK German Factory Parts: MR556 Bolt Carrier Bolt head complete Firing pin spring Firing pin Cam pin All misc parts that comprise a complete bolt...HKP-02618$684.95 -
H&K MIL-SPEC 416 OTB Buffer Tube & HK E1 Stock Combo
H&K Heckler & Koch
$469.95HK 416 OTB E1 Stock & Buffer Tube ComboGenuine HK 416 E1 Stock with the new style marine environment "over the beach" buffer tube. Buffer tube has ball bearing rollers to tighten the stock when locked in position, and helps smooth the sliding action...HKP-20104$469.95 -
Out Of Stock
HK G36 Backplate Complete w/ Recoil Assembly
USA
$84.95HK G36 Backplate Complete With Recoil Assembly New G36 Backplate with new G36/SL8 recoil buffer and recoil assembly. This assembly does include the recoil rod retaining screw. This is a great spare or replacement to have on hand. These are also required...HKP-18537$84.95 -
HK G36/SL8 Complete Recoil Rod Assembly
USA
$39.95Recoil Rod Assembly For All - HK G36 & SL8 New G36/SL8 recoil rod assembly complete. Great for replacement or for a spare as these have been hard to find. Made in the USA. Compatible With: G36 SL8HKP-18539$39.95 -
On Sale
HKP AR-15 3 Slot Medium Rail Riser, Universal
HKP HK Parts
Now: $8.95Was: $14.95HKP AR-15 3 Slot Medium Rail Riser, Universal Universal Picatinny mount rail riser for any firearm featuring a Picatinny top rail. Perfect for giving an optic a little more height while maintaining a lower 1/3rd cowitness.HKP-15330Now: $8.95Was: $14.95 -
Remington Defense HK 416 14.5" Handguard - FDE
Defense Remmington
$999.95Remington Defense Handguard Assembly Kit - 14.5" - HK 416 - Tan The most popular handguard for DEVGRU, SEAL teams and other special operators. This is a one time deal once these are gone there will be no more. Compatible With: 14.6 &...HKP-19491$999.95 -
SureFire AR-15 WARCOMP Flash Hider
Surefire
$159.95SureFire AR-15 WARCOMP Flash Hider Compatible With: All M4/M16/AR Variants Specifications: Construction: Heat treated stainless steel Coating: DLC Coating Length: 2.7 inches (6.8 cm) Weight: 3.8 ounces (107.7 g) UPC: 084871324625HKP-18044$159.95 -
B&T HK G36K (5.56/.223) Quad Rail Handguard
B&T Brugger & Thomet
$329.95Swiss Made B&T Quad-Rail (4 Sided Picatinny Rail) Handguard For HK G36K Aluminum version with rail cover and sling swivel. The B&T offering is the finest railed hand guard available for the HK G36K or SL8 conversions to G36K spec.B&T...HKP-16895$329.95 -
On Sale
B&T SIG SG 550 Series Mount
B&T Brugger & Thomet
Now: $91.95Was: $124.95B&T Mounting Rail NAR Low Profile Mount for SIG SG 550/551/552/553 Specifications: Color: Black Height max: 16 mm Length max: 152 mm Length of top rail: 152 mm Material: Aluminum & steel NATO Accessory Rails: 1 Treatment: Hartcoat anodized &...HKP-16866Now: $91.95Was: $124.95 -
Geissele HK MR556 Trigger
Geissele
$489.95Geissele HK MR556 Triggere The HK MR556 trigger is similar to Geissele's SSA with a 4.5 total pull weight. It can be used in both the HK 556 and semi-auto HK 416's. Each Trigger comes with full installation instructions and the lubricant you will need...HKP-16464$489.95 -
H&K 93/53/33 (5.56 / .223) Surplus Fixed Stock - A2 - Dark OD Green
H&K Heckler & Koch
$139.95Surplus - Fixed Stock - Dark OD Green - HK93,33,53 Hand-picked stocks in excellent condition. Comes with matching buttpad. Ready to install on your HK or clone rifle. German military surplus, but handpicked to give you the best of the offerings...HKP-18889$139.95 -
H&K G36 (5.56/.223) Catch, Trip Lever
H&K Heckler & Koch
$11.95HK G36 Catch, Trip Lever For Bolt Contact On All G36 LowersHKP-01870$11.95 -
H&K HK G36 Left Side Lower Hammer Spring
H&K Heckler & Koch
$8.95HK G36 Left Side Lower Hammer SpringHKP-01856$8.95 -
H&K HK G36K Forearm - Black
H&K Heckler & Koch
$139.95HK G36K Forearm With Hand Stop & Heat Shield- German HK New HK German latest production HK G36K forearm that has the hand stop and heat shield installed. Also a popular forearm choice for those doing the SL8 to G36 conversions. Has the mounting...HKP-00617$139.95 -
HK G36/SL8 Dual Optic Replacement Battery
$14.95HK G36 & SL8 Dual Optic Replacement Lithium Battery The proper battery with the proper voltage for all HK dual optic units. Please Note: Standard AA batteries WILL NOT work. You need this specialized battery for the optic to function...HKP-00009$14.95 -
HKP HK G36/SL8 (5.56/.223) Cocking Handle
HKP HK Parts
$49.95Cocking Handle For G36 & SL8 Bolt Carriers - USA New USA made charging handle ideal for a 922 repalcement part. Made in the USA.HKP-18251$49.95 -
HKP HK MR556/416 Barrel Mandrel Tool
HKP HK Parts
$169.95HKP HK MR556/416 Barrel Mandrel Tool US Made - HK 416, MR556 Barrel Mandrel Tool.HKP-19059$169.95 -
MFI HK 93/53/33 (5.56 / .223) Low Profile Scope Rail Extended - 8.5 inch
MFI
$189.95MFI 8.5 Inch Mounting Rail For HK 93, 33, Style Receivers The MFI extended scope rail is a quick and easy solution to add a Picatinny top rail to your HK receiver without modifications. The low-profile rail does not impede the iron sights. The rail uses...HKP-01829$189.95 -
RCM HK 53 Full Auto Bolt Carrier US
RCM
$369.95Bolt Carrier - US - RCM - HK53 Brand new US manufactured new style HK53 factory bolt carrier. The finest HK53 carrier ever made with the latest & greatest German inspired improvements and updates. Ideal for 556/.223 & .300 BLK firearms...HKP-20538$369.95 -
RCM HK 53 Locking Piece #15 - 65 Degree
RCM
$74.95RCM HK 53 Locking Piece #15 - 65 Degree The #15 LP is the correct locking piece for the HK53 and several other custom-build applications. The locking piece is the timing mechanism that a delayed roller lock firearm uses to tell...HKP-02524$74.95 -
SB Tactical AR-15 5 Position Adjustable Stabilizing Brace
SB Tactical
$99.99SBA3 - 5 Position Adjustable Stabilizing Brace - AR15 Designed for all platforms capable of accepting a mil-spec carbine receiver extension, the SBA3 is a 5-position adjustable, dramatically enhances versatility, and features a minimalist design with an...HKP-18646$99.99 -
GSG9 HK SL8, HK G36 Magazine Release Axle Pin
GSG9
$10.95HK G36 & SL8 Magazine Release Axle - USA Mag release axle for all G36 & SL8 models. A must-have spare part. Made in the USA. Compatible With: G36 G36K G36K SL8 Other custom G36 type buildsHKP-18255$10.95 -
H&K HK 416 German Flash Hider
H&K Heckler & Koch
$95.95H&K HK 416 German Flash Hider (Not compatible with suppressors) Compatible With: HK 416 A5- 11" HK 416 A5- 14.5" HK 416 A5 - 16.5" HK 416 A5- 20"hkp-18521$95.95 -
H&K HK 416 Roll Pin For 33mm Front Folding Sight
H&K Heckler & Koch
$4.95HK 416 Roll Pin For 33mm Front Folding Sight A great spare to have on hand as they become damaged or lost easily, this item is the enhanced (longer) roll pin for a more secure fitment.HKP-14144$4.95 -
H&K HK G36/G36K Gas Block
H&K Heckler & Koch
$99.95HK G36E, G36K - Gas Block - German HK The real deal. HK German G36E, G36K Factory Gas Block. New uninstalled. Compatible With: SL8 Other G36 variants and custom builds and projectsHKP-16351$99.95 -
H&K HK G36C Complete Rear Stock Assembly - Black
H&K Heckler & Koch
$199.95HK G36C Rear Stock Assembly Complete - German Genuine German Heckler & Koch G36C rear stock assembly. One full inch shorter than the standard G36 stock. This is the preferred stock for average-height users. Compatible With: G36 G36K G36C SL8...HKP-00626$199.95 -
H&K HK HK33 Slimline Forearm - Black
H&K Heckler & Koch
$59.95H&K HK HK33 Slimline Forearm - Black Used German military surplus black cerakote slimline forearm cut down to fit the HK33. These are rare items only offered here at HK Parts. Each item is in good to excellent shape. Compatible With: HK33 HK...HKP-20273$59.95 -
H&K HK MR556/416 Ejection Port Spring
H&K Heckler & Koch
$7.95HK MR556 & HK416 Ejection Port SpringHKP-02616$7.95 -
H&K HK MR556/416 Forward Assist Pin
H&K Heckler & Koch
$4.95Forward Assist Pin For MR556 & HK416 PinHKP-02662$4.95 -
Out Of Stock
HK G36C/G36K Gas Piston
USA
$49.95HK G36C/G36K Gas Piston New Tom Bostic US Made G36C & G36K Gas Piston. Counts as one US made compliant part for your SL8 - G36C or G36K style conversion. This is one of the best parts to use on the conversion as it is one of the cheapest ways to get...HKP-17277$49.95