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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HK UMP (.45 ACP) 25 Round Magazine
HKP HK Parts
$49.95HK UMP 45 magazine & LWRC SMG45. Made from advanced polymer material with steel feed lips just like the German UMP 45 magazine. This UMP 45 magazine will fit all HK UMP 45 firearms as well as the LWRC SMG 45 and other UMP style builds such as...HKP-16448$49.95 -
H&K HK .45 ACP Pistols Barrel O-Ring - Green
H&K Heckler & Koch
$4.95HK .45 ACP Pistols Barrel O-Ring - Green Get them while you can, as they are no longer available in green. The green o-rings were used when HK introduced o-rings on the Mark 23 and USP 45 Tactical HK pistols. All HK o-rings are...HKP-01984$4.95 -
Out Of Stock
H&K 12 Round HK USP .45 ACP Extended Floorplate Magazine - Black
H&K Heckler & Koch
$49.00HK German Production USP .45 - 12 Round Magazine Compatible With: HK USP .45 Full-Size Pistols HK USP 45 Tactical USP Expert, USP Elite Please Note: This will not fit the HK Mark 23 without swapping the floorplate to the Mark 23 floorplate.HKP-00314$49.00 -
H&K 10 Round HK USPC/45C .45 ACP Magazine - Black
H&K Heckler & Koch
$49.95New HK German HK45C & USP Compact .45 10 Round Magazine With an extended rubberized base plate. Brand new factory German manufacture. Compatible With: HK45C, HK45C Tactical HK USP Compact 45, HK USPC .45 TacticalHKP-00304$49.95 -
H&K 10 Round HK 45/45 Tactical .45 ACP Magazine - Black
H&K Heckler & Koch
$49.00HK45 10 Round Magazine The HK45 is the newest .45 Caliber pistol HK manufactures. This is the largest mag capacity magazine available for the HK45 and HK45 Tactical pistol. Compatible With: HK45 HK45 Tactical Please Note: This will not fit the...HKP-00958$49.00 -
H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black
H&K Heckler & Koch
$4.95H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black A great spare and a much-needed part for your HK barrel. This factory part is a high-wear item, as the O-ring provides the seal between the slide and the barrel, which provides a secure lockup with...HKP-00296$4.95 -
H&K 12 Round HK Mark 23 .45 ACP Magazine - Black
H&K Heckler & Koch
$59.00HK German Mark 23 & SOCOM 12 Round .45 Cal Magazine New factory fresh German HK manufactured. The real deal steel-bodied factory fresh magazine with the upgraded maritime finish. Compatible With: HK Mark 23 SOCOM .45HKP-00295$59.00 -
HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) 3 Piece Picatinny Rail Set
HKP HK Parts
$149.95HK UMP, USC Rail Set Complete A complete set of rails for your HK UMP/USC carbine. Each set includes the finest rail set available with the improved side for no sharp edges, upper rail is an extended rail to offer more room for preferred fitment of your...HKP-17429$149.95 -
H&K 8 Round HK USPC/45C Magazine - Black
H&K Heckler & Koch
$49.00New HK German HK45C & USPC 45 8-Round Magazine HK German 8-round magazine with finger rest. New factory-fresh, hard to find. Compatible With: HK USP 45 Compact HK45C & HK45C Tactical modelsHKP-00303$49.00 -
HKP HK .45 Barrel O-Ring All Caliber Pistols - Red
HKP HK Parts
$4.95A rare find as we have found a small lot of HK red-colored HK .45 O-rings. All HK o-rings are still made of the same material as the newer black o rings only in the HK red color.A great spare and a much-needed part for your HK barrel. This part is a...HKP-19316$4.95 -
H&K HK USP Series/45 Series .45 ACP 16 x 1 Thread Protector
H&K Heckler & Koch
$24.95New HK German 45 Caliber Tactical Thread Protector The cap fits all HK 45 cal full-size & compact barrels threaded 16mm X 1mm left-hand thread. A must-have item to protect your threaded barrels, exposed threads, and your HK pistol investment. The use...HKP-00297$24.95 -
HKP, H&K 17 Round HK Mark 23 / USP .45 ACP Complete Magazine - Black
$119.95Magazine Extension Complete - 17 Round - HK Mark 23/USP .45 Mark 23 magazine extension +5 adds five additional rounds to the full-size HK Mark 23 12 round magazine. Each mag comes fully assembled and ready for use. HK Parts takes an existing...HKP-19465$119.95 -
HKP 12 Round HK 45C, HK USPC .45 ACP Magazine - Black
HKP HK Parts
$79.95HKPARTS magazine extension +4 adds 4 additional rounds to the HK45C, 8 round magazine. Each unit is then fully assembled as a 12 round HK45C magazine. Ideal for competitive shooters, concealed carry or for everyday use while at the range. Each magazine...HKP-18672$79.95 -
H&K HK USPC/45/45C Magazine Floor Plate - Black
H&K Heckler & Koch
$8.95H&K HK USPC/45/45C Magazine Floor Plate - Black Ideal for use for concealed carry or a lower profile on the magazine footprint. New HK German manufacture. Compatible With: HK USP Compact .45 HK USP Compact Tactical .45 HK45C HK45C TacticalHKP-01123$8.95 -
HKP HK UMP (.45 ACP) 15 Round Magazine
HKP HK Parts
$49.95UMP, SMG .45 Cal 15 Round Magazine - USA Each ultra compact 15 round magazine will fit all HK UMP .45 caliber carbines, SMG's as well as the USC-UMP .45 caliber conversions. Each magazine features, steel feed lips, enhanced polymer contruction and all...HKP-17585$49.95 -
HKP 13 Round HK 45/45 Tactical .45 ACP Magazine - Black
HKP HK Parts
$104.95HK45 & HK45 Tactical +3 magazine extension coupled with a new HK German 10 round HK45 magazine. Each unit is then fully assembled as a 13 round HK45, HK45 Tactical magazine. Ideal for conceled carry, competition shooters that would like the highest...HKP-18387$104.95 -
H&K UMP (.45 ACP) 25 Round Magazine
H&K Heckler & Koch
$95.95New HK German Non-LE/Mil Marked UMP .45 ACP 25 Round Magazine The UMP .45 magazines will fit all UMP factory firearms as well as the USC's that have been converted to accept UMP magazines. Compatible With: HK UMP .45 HK USC to UMP . 45 conversions HK...HKP-00605$95.95 -
H&K 12 Round HK USP .45 ACP Standard Magazine Floor Plate
H&K Heckler & Koch
$19.95H&K 12 Round HK USP .45 ACP Standard Magazine Floor Plate New factory fresh production. Perfect for concealed carry or for those that prefer a lower profile footprint. Compatible With: USP .45 Full Size - 12 round USP .45 Tactical - 12 round USP .45...HKP-01198$19.95 -
HKP +4 HK 45C, USPC .45 ACP Magazine Extension - Black
HKP HK Parts
$49.95HK PARTS magazine extension +4 adds 4 additional rounds to the HK45C, 8 round magazine. Each unit can then be fully assembled into a 12 round HK45C magazine. Ideal for competitive shooters, concealed carry, or for everyday use while at the range. Super...HKP-18654$49.95 -
H&K 12 Round HK USP .45 ACP Standard Floorplate Magazine - Black
H&K Heckler & Koch
$59.0012 Round HK USP .45 ACP Standard Floorplate Magazine - Black New HK German USP 45 12-round magazine with standard floor plate (no extended finger rest) as this mag sits flush. Compatible With: HK USP .45 Full-Size Pistols HK USP .45 TacticalHKP-02374$59.00 -
25 Round HK UMP 45 LWRC SMG 45 Magazine - FDE
USA
$49.9525 Round HK UMP 45 LWRC SMG 45 Magazine - FDE Made from advanced polymer material with steel feed lips, just like the German UMP 45 magazine, at a fraction of the cost. Compatible With: HK UMP .45 LWRC SMG .45 (This magazine is the factory OEM magazine...HKP-20367$49.95 -
H&K UMP (.45 ACP) 25 Round Magazine Spring
H&K Heckler & Koch
$9.95H&K UMP (.45 ACP) 25-Round Magazine Spring Perfect for spares and to have on hand as these are a consumable item that needs to be replaced from time to time. A must-have item if you own a USC/UMP conversion or UMP.HKP-01548$9.95 -
HKP HK 45 Rail Mount Compensator - Black
HKP HK Parts
$189.95HKP HK 45 Rail Mount Compensator - Black Specifications: Length: 5 inches Height: 2 1/2 inches Weight: 5 oz. Torque: 3nM / 26 inch-lbs Crafted from aircraft-grade billet aluminum and finished in durable Cerakote. Not to be used with HK45 threaded...HKP-20569$189.95 -
H&K 10 Round HK USP .45 ACP Extended Magazine w/ Pinky Rest - Black
H&K Heckler & Koch
$49.00H&K 10 Round HK USP .45 ACP Extended Magazine w/ Pinky Rest - Black Perfect for the states that require 10-round magazines or for those that compete & require a 10-round-only magazine. Compatible With: HK USP .45 HK USP Tactical .45 HK USP...HKP-00315$49.00 -
H&K USC (.45 ACP) 10 Round Magazine
H&K Heckler & Koch
$68.95HK German Factory 10 Round USC .45 Magazine This is the only magazine that HK offers for HK USC unless you want to upgrade to the USC-UMP style of conversions. Compatible with all HK USC Carbines.HKP-00811$68.95 -
HKP .45 ACP .578 x 28 Micro Comp
HKP HK Parts
$29.95HK Parts Micro Comp - .45 Cal - .578 x 28 The HK Parts micro comp & thread protector is designed to be lightweight, and functional as both a compensator and thread protector. The HK Parts micro comp easily attaches to the end of any factory spec (...HKP-20212$29.95 -
H&K 10 Round HK USPC/45C 45 Magazine Floorplate - Black
H&K Heckler & Koch
$14.95H&K 10 Round HK USPC/45C 45 Magazine Floorplate - Black Each floor plate is the new style rubberized floorplate for enhanced life. A great spare part to have on hand for repair and replacement of parts. This floorplate is commonly called the...HKP-02210$14.95 -
HKP HK USP45, Mark 23 +5 Magazine Extension
HKP HK Parts
$49.95Magazine Extension - +5 - HK USP45 & Mark 23 Super easy to install, simply add the mag extension to your existing mag body and follower. An easy 2 min swap. No gunsmithing needed. Made 100% in the USA out of aircraft grade hard coat anodized aluminum...HKP-19493-M$49.95 -
H&K HK Mark 23 Thread Protector
H&K Heckler & Koch
$24.95New factory HK Mark 23 SOCOM thread protector This is the only thread protector that HK offers that will fit the HK Mark 23 Pistol. This is a hard-to-find item and a must-have for all MK23 Owners. Compatible With: All H&K Mark 23/ SOCOM barrels...HKP-00293$24.95 -
H&K HK 45/45C Ambidextrous Control Lever Kit - Black
H&K Heckler & Koch
$89.95Factory HK German Genuine HK45 & HK45C Ambidextrous Control Lever Kit A must-have upgrade for those who would like to have the ability of both left and right side control levers. Hard to find, easy to install as this is a drop-in part - no...HKP-01154$89.95 -
H&K 8 Round HK USPC/45C .45 ACP Floorplate - Black
H&K Heckler & Koch
$64.95H&K 8 Round HK USPC/45C .45 ACP Floorplate - Black Brand new German HK manufacture. Compatible With: HK45 Compact, HK45 Tactical HK USP Compact 45, HK USPC TacticalHKP-01454$64.95 -
On Sale
KCI Glock 26-Round.45 ACP Magazine - Black
Now: $9.95Was: $14.95KCI Glock 26-Round.45 ACP Magazine - Black Compatible With: Glock .45 ACP double stack models 21 & 30 Features: Hardened steel insert encased in high-tech polymer (fully metal lined) Please Note: Like many new magazines, these have a stiff spring...HKP-02298Now: $9.95Was: $14.95 -
H&K 12 Round HK USP/Tactical .45 ACP Magazine Spring
H&K Heckler & Koch
$8.95HK Pistol Magazine Spring This is a must-have spare part for all HK pistol owners. HK recommends that for optimum performance, you change out the magazine springs often and swap them regularly when keeping the pistol magazines loaded for long periods...HKP-01426$8.95 -
H&K HK USP/Tactical/Expert Complete Recoil Assembly
H&K Heckler & Koch
$87.95H&K HK USP/ Tactical/ Expert Complete Recoil Assembly Brand new factory German manufacture. Compatible With: HK USP 45 Tactical HK USP 45 Expert HK USP 45 Elite Tech Note: The USP Tactical recoil assembly can be used in a standard USP 45 without...HKP-01160$87.95 -
HKP HK Mark 23 Gen 2 Rail Mount Compensator - Black
HKP HK Parts
$329.95The HK Parts Mark 23 Compensator is the perfect addition to your firearm. This compensator also includes a picatinny rail so you can still use your lights/lasers. The MK23 compesnator can be used with the standard length and tactical length barrels. The...HKP-18745$329.95 -
H&K 12 Round HK Mark 23 Floor Plate - Black
H&K Heckler & Koch
$8.95HK Mark 23 12 Round Magazine Floor Plate A great item to have on hand as the floor plates can become cracked and broken with use and time. Compatible With: Mark 23 12 round mags SOCOM Mark 23 12 round magsHKP-01196$8.95 -
HKP +2 HK 45C Finger Rest Magazine Extension - Black
HKP HK Parts
$29.95HK45C 8 Round Magazine +2 Magazine Extension/Finger RestAll of the HK .45 cal mags will soon have a variety of mag extensions! More to come.New product. HK45C 8 round +2 mag extensions. Replaces the floorplate for a +2 round addition for a total of 10...HKP-17999$29.95 -
Out Of Stock
Promag 20 Round HK USP/Mark 23 .45 ACP Magazine - Black
Promag
$49.95Made in the USA by Promag. Fits all USP .45 Full Size Pistols including the USP .45 Full Size, USP 45 Tactical, USP 45 Elite & Expert. These will also fit the Mark 23 pistol if you slide off the grip extension or modify the grip extension for fitment...HKP-00861$49.95 -
H&K 10 Round HK 45 Magazine Floorplate
H&K Heckler & Koch
$9.9510 Round HK 45 Magazine Floorplate This is HK's Newest .45 ACP caliber pistol. Compatible With: HK45 Pistol Please Note: NOT for use on the USP .45 magazines.HKP-02476$9.95 -
HKP HK UMP 45, SMG 45 Magazine Loader
HKP HK Parts
$39.95The enhanced loader is the finest loader available for UMP 45 magazines. Taking into account all of the options the original HK German loader offered. While adding in comfort and aesthetic details and upgrades to offer the finest loader on the market. A...HKP-19662$39.95