Barrels
Premium HK Barrels and Firearm Parts to upgrade your HK firearm with precision-engineered, CHF (Cold Hammer Forged) barrels, and premium parts built for reliability, unparalleled accuracy, and long-term performance. Our OEM and aftermarket HK barrels deliver exceptional quality and fit for pistols, rifles, and submachine guns.
Key Features:
- CHF (Cold Hammer Forged) construction for unmatched durability and precision
- Engineered for superior accuracy and shot consistency
- Made from premium, corrosion-resistant materials
- Designed for performance, competition, and tactical applications
- OEM fit and easy installation across multiple HK platforms
Enhance your HK pistol or rifle with the best high-performance CHF barrels engineered for excellence, trusted by professionals and firearm enthusiasts.
- Product
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HK MR556 A4 Gas Block- Incomplete
H&K Heckler & Koch
$187.00H&K HK MR556 A4 Gas Block - Incomplete The H&K HK MR556 A4 Gas Block is a high-quality, precision-machined component designed for the MR556 A4 rifle. It houses the gas system that directs gas from the barrel to cycle the action. Compatible...HKP-22087$187.00 -
HK MP5K Barrel - .40 S&W - Threaded 14x.75 with 3 Lug
RCM
$279.95RCM HK MP5K .40 S&W Barrel - Threaded 14x.75 - 3-Lug This is the ultimate US-made barrel for any new or conversion build for the MP5K .40 cal. Crafted from top-grade CHF 41v40 material, it’s machined to impeccable standards. With the correct...HKP-21585$279.95 -
HK G36K Piston Rod - Incomplete
H&K Heckler & Koch
$69.95Heckler and Koch Incomplete Piston Rod for HK G36K Constructed from a black finished steel, this incomplete factory original part from HK is made in Germany and designed for HK G36K rifle models chambered in 5.56 / .223 This rod is the main component of...HKP-16345$69.95 -
Out Of Stock
HK VP40 Tactical Barrel - .40 S&W - 4.45" - Threaded 9/16x24
RCM
$212.50RCM HK VP40 .40 S&W Tactical Barrel - Threaded 9/16x24 Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded barrel for the HK VP40 .40 S&W pistol,...HKP-17370$212.50 -
Out Of Stock
HK USP Barrel - .45 ACP - 6.02" - Match
H&K Heckler & Koch
$0.00H&K HK USP .45 ACP Barrel - Match The real deal factory HK Match barrel. This barrel will fit all HK USP .45 full size models. If you want a longer barrel for your HK USP 45 or USP 45 Tactical this is a great option for an extended length or for use...HKP-17508$0.00 -
Out Of Stock
HK USP Tactical Barrel - 9mm- Threaded 13.5x1 LH
H&K Heckler & Koch
$0.00Heckler and Koch HK USP 9mm Tactical Barrel - Threaded 13.5x1 LH This barrel is a drop-in replacement barrel for standard full-size USP 9mm Pistols. Cold hammer forged, polygonal rifled, and made in Germany. Specifications: Threaded 13.5x1 LH Overall...HKP-00797$0.00 -
Out Of Stock
HK416, MR556 Barrel Conversion Kit - 9" - HK416C Style
HKP HK Parts
$0.00MR556 & HK416 Barrel Conversion Kit - 9" - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18401$0.00 -
Out Of Stock
HK G36K Piston Rod Assembly, Complete
GSG9
$59.95GSG9 USA Made Complete Gas Piston Rod and Spring Assembly for HK G36K New spring assembly that is a must have for spare parts or to use on that HK SL8-G36 conversion. This is the proper length gas piston to be used for a 12.5" HK G36K style length gas...HKP-18249$59.95 -
Out Of Stock
HK UMP Barrel - 9mm - Standard
HKP HK Parts
$299.95HK UMP 9mm Barrel US made replica of the HK UMP 9mm barrel. Counts as one US made compliant part as an added bonus.HKP-18640$299.95 -
Out Of Stock
HK21E, HK23E Barrel Case - Swivel Sling - 18 inch Barrels
H&K Heckler & Koch
$0.00All steel heavy duty carrying case to carry your Heckler and Koch HK21 and HK23 Barrels. Features: Heavy Duty Steel 18" barrel carrying case for 17.7" barrels Sling attached Rare and out of production Compatible with: HK21, HK21E 17.75 inch...HKP-00586$0.00 -
Out Of Stock
HK MP5 Thread Protector Cap - .40 S&W, 10mm - 14x.75
H&K Heckler & Koch
$0.00H&K MP5 40/10 Thread Protector Cap - Threaded 14x.75 HK German Factory Thread Protector For All MP5 40/10 Factory HK Barrels. The Thread Pitch Is Metric 14x75HKP-00422$0.00 -
Out Of Stock
HK MP5K Barrel Extension and Faux Suppressor - 9mm - 3 lug
MFI
$179.95MFI MP5K 9mm Barrel Extension/Faux Suppressor - 3-lug Each faux suppressor is designed to attach to the 3 lug MP5K 3 lugged barrel and can be permanently attached (blind pinned) in place to get the overall length of 16.25"overall. Perfect for that rifle...HKP-18007$179.95