Barrels
Discover premium HK barrels and parts for your firearms. Our bestselling selection includes replacement barrels, custom barrels, precision barrels, and tactical barrels, all crafted to meet the highest standards. Whether you need stainless steel barrels, threaded barrels, pistol barrels, rifle barrels, or submachine gun barrels, we have the ideal upgrade for you. Enhance your HK rifle or pistol with high-performance, aftermarket, and competition barrels. Shop now for OEM barrels and accessories to elevate your shooting experience with unparalleled quality and reliability.
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HKP MP5 40/10 Trunnion
HKP HK Parts
$139.95MP5 40 & MP5 10mm Trunnion Machined from ordnance-grade steel and heat-treated to factory specs. Each has the bullet guides pre-installed and included. These are the best USA-made trunnions on the market. Machined to HK spec, making the installation...HKP-02737$139.95 -
RCM HK P30L .40 S&W To .357 SIG Conversion Barrel - Non-Threaded
RCM
$237.50RCM HK P30L .40 S&W To .357 SIG Conversion Barrel - Non-Threaded 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 P30L .40...HKP-17568$237.50 -
RCM HK34 MP5 9mm Barrel - Non-Threaded
RCM
$264.95RCM HK34/94 MP5 9mm Barrel - Non-Threaded Each non-threaded barrel is hand-selected from the finest cold hammer forged steel (CHF) 41V45 barrel blanks. Expertly profiled and chambered in the desirable 16 flute chamber profile. Each barrel is finished...HKP-00927$264.95 -
Out Of Stock
H&K P30 9mm Tactical Barrel - Threaded 1/2x28 RH
H&K Heckler & Koch
$449.95H&K P30 9mm Tactical Barrel - Threaded 1/2x28 RH Each HK German barrel now includes a factory HK German thread protector, designed specifically for threaded P30 barrels in 1/2x28. We start with a new HK German P30L barrel, professionally fitted to...HKP-19964$449.95 -
RCM HK MP5 9mm Barrel - Non-Threaded 3-Lug
RCM
$149.95RCM HK MP5 9mm Barrel - Non-Threaded 3-Lug Made from Cold Hammer Forged (CHF) steel, each high-quality barrel is processed with a durable nitride finish, similar to the treatment used by Sig Sauer. Precision-milled to the latest specifications with...HKP-02040$149.95 -
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 -
Out Of Stock
HKP HK UMP .40 S&W Barrel - Threaded 9/16x24 - 3-Lug
HKP HK Parts
$299.95HKP HK UMP .40 S&W Barrel - Threaded 9/16x24 - 3-Lug This new USA-made .40 S&W 8" barrel is designed for UMP or Omega firearms, featuring both 9/16x24 threading and a 3-lug tip. It’s the finest barrel available for the UMP .40 S&W,...HKP-18282$299.95 -
B&T HK MP5K/SP5K/SP89 9mm Barrel - Threaded 1/2x32 - 3-Lug
B&T Brugger & Thomet
$399.95B&T HK MP5K/SP5K/SP89 9mm Barrel - Threaded 1/2x32 - 3-Lug New from B&T Switzerland, this cold hammer-forged (CHF) and nitrided barrel is specifically designed for the HK SP5K. Manufactured to exact HK factory specifications, it features a...HKP-17908$399.95 -
H&K HK P30SK/P2000SK 9mm Barrel
H&K Heckler & Koch
$239.95P2000SK & P30SK 9mm Barrel Brand new factory HK German barrel. Compatible With: P2000 SK P30 SKHKP-01558$239.95 -
HK94 Clone Original Vented Barrel Shroud w/ Grip
E&L MFG
$139.95HK94 Clone Original Vented Barrel Shroud w/ Grip This is the OEM HK part. The vertical grip is detachable and will not fit heavier barrels such as Vector or MKE barrels. Please Note: This will NOT fit 3 lug barrels.HKP-00020$139.95 -
HKP .40 S&W Thread Protector - Threaded 14.5x1 LH - Titanium
HKP HK Parts
$24.95HKP HK .40 S&W Thread Protector - Threaded 14.5x1 LH - Titanium Solid Titanium .40 S&W tactical thread protector, cap fits all HK USP .40 S&W full size & compact barrels threaded 14.5x1 left hand thread. A must have item to protect your...HKP-17961$24.95 -
RCM HK USPC .45 ACP Barrel - Threaded 16x1 LH
RCM
$270.00RCM HK USPC .45 ACP Barrel - Threaded 16x1 LH HK USPC .45 ACP & HK USPC Tactical .45 ACP barrel with 16x1 threaded design, compatible with various flash hiders and sound suppressors. Unlike the factory USPC Tactical .45 ACP barrel with metric 16x1...HKP-20129$270.00 -
On Sale
HKP AR-15 Low Profile Gas Block
HKP HK Parts
Now: $12.95Was: $29.95AR15, M4 Billeted Low Profile Gas Block - Stainless Steel Made to strict military specifications. These high quality components will provide excellent fit and reliable function in your AR series platforms. These AR-Stoner parts are perfect for upgrading...HKP-18088Now: $12.95Was: $29.95 -
Nefarious Arms HK 416/MR556 11" A3 Barrel
Nefarious Arms
$694.95Nefarious Arms HK 416/MR556 11" A3 Barrel ***THE BARREL EXTENSION RIM IS MARKED "HAUS" DUE TO AN ERROR BY THE BARREL EXTENSION SUPPLIER. THE MARKING IS NOT VISIBLE ONCE INSTALLED. THESE BARRELS ARE GENUINE NEFARIOUS BARRELS AS NEFARIOUS WILL...HKP-21619$694.95 -
RCM HK45C/45C .45 ACP Tactical Barrel - Threaded 16x1 LH
RCM
$270.00RCM HK45C/45C .45 ACP Tactical Barrel - Threaded 16x1 LH US-made HK45C & HK45C Tactical threaded barrel, compatible with a range of flash hiders and sound suppressors. Unlike the factory HK45C Tactical barrel with metric 16x1 LH threads, this...HKP-20131$270.00 -
H&K HK MR556/416 Titanium Barrel Nut
HKP HK Parts
$99.95Titanium HK MR556, HK 416 Barrel Nut Or Socket For Barrel 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 installation processes. Made in the USA...HKP-17275$99.95 -
Out Of Stock
HKP HK G36C Barrel - Black
HKP HK Parts
$499.95HKP HK G36C Barrel - Black Brand new HK G36C barrel made from 416 stainless steel and nitrided, uninstalled & unfired. The G36C barrel uses a factory German or USA spec G36K/G36C gas block. Counts as one USA made complaint part. Perfect for the...HKP-18195$499.95 -
RCM HK P2000 9mm Barrel - Threaded 13.5x1 LH
RCM
$225.00RCM HK P2000 13.5x1 9mm LH Threaded Barrel - Black Each P2000 tactical barrel is finely and painstakingly made from ordnance grade steel, heat treated and finished inside and out in the ultra-desirable nitride finish. This is the finest threaded...HKP-16701$225.00 -
RCM HK VP9 9mm Tactical Barrel - Threaded 13.5x1 LH
RCM
$225.00RCM HK VP9 9mm Tactical Barrel - Threaded 13.5x1 LH Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for the HK VP9 9mm pistol, ideal...HKP-16850$225.00 -
HK45 .45 ACP Thread Protector - Threaded .578x28 RH
USA
$24.95HK45 .45 ACP Thread Protector - Threaded .578x28 RH Made in the USA, HK45 .45 ACP thread protector, for full size & compact barrels with a 578x28 RH. A must have item to protect your threaded barrels, exposed threads, and your pistol. Made from...HKP-19891$24.95 -
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 -
RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded 16x1 LH
RCM
$270.00RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded 16x1 LH US-made HK Mark 23 tactical threaded barrel designed for use with a wide variety of flash hiders and sound suppressors. Unlike the factory HK Mark 23 barrel with 16x1 right-hand...HKP-17443$270.00 -
Out Of Stock
H&K Barrel VP9 - Black
H&K Heckler & Koch
$0.00H&K Barrel VP9 - Black Brand New HK German Standard Length VP9 Barrel. Marked HK 9mmx19. Brand new cold hammer forged & made in Germany. Compatible With: HK VP9 and VP9 Tactical ModelsHKP-16820$0.00 -
RCM HK 53 (5.56/.223) Barrel - Threaded 16x1
RCM
$164.95RCM HK 53 (5.56/.223) Barrel - Threaded 16x1 These are the finest US-made barrels available and come highly recommended by HKPARTS. Machined 100% in the USA, 922r compliant, and counts as 1 US-made 922r compliant part. Specifications: Cold Hammer Forged...HKP-01156$164.95 -
H&K (5.56/.223) & (7.62x51/.308) Rifle Blank Firing Adapter- HK Barrels
H&K Heckler & Koch
$39.95H&K (5.56/.223) & (7.62x51/.308) Rifle Blank Firing Adapter- HK Barrels German blank firing adapter used from the German military. Best quality & price in the country by the best makers of US made HK components available anywhere. Compare...HKP-15593$39.95 -
HK P2000 .40 to .357 Conversion Barrel
$239.95HK P2000 .40 to .357 Conversion Barrel This is a great spare or replacement barrel to have on hand. Also, a popular barrel to convert the P2000 .40 to .357. Compatible With: HK P2000 .40 S&WHKP-20580$239.95 -
HKP HK 416 (5.56/.223) A5 Converted Barrel - Threaded 1/2x28
HKP HK Parts
$588.95HKP/H&K 416 (5.56/.223) & A5 Converted Barrel - Threaded 1/2x28 These barrels began as standard A3 style but have been precisely machined with an A5-style relief cut to fit HK 416 & MR223 A5 uppers. Now, you can have a drop-in barrel for your...HKP-21449$588.95 -
Nefarious Arms HK 416 Gas Block Assembly Tool
Nefarious Arms
$128.95Nefarious Arms HK 416 Gas Block Assembly Tool A Nefarious Arms creation for those that like to service or replace their 416 gas block. This assembly tool will effortlessly help you assemble or disassemble your 416 gas block by simply aligning the two...HKP-21273$128.95 -
Out Of Stock
Nefarious Arms HK 416/MR556 14.5" A3 Barrel
Nefarious Arms
$694.95Nefarious Arms HK 416/MR556 14.5" A3 Barrel ***THE BARREL EXTENSION RIM IS MARKED "HAUS" DUE TO AN ERROR BY THE BARREL EXTENSION SUPPLIER. THE MARKING IS NOT VISIBLE ONCE INSTALLED. THESE BARRELS ARE GENUINE NEFARIOUS BARRELS AS NEFARIOUS...HKP-21589$694.95 -
RCM HK VP9SK 9mm Tactical Barrel - Threaded 13.5x1 LH
RCM
$225.00RCM HK VP9SK 9mm Tactical Barrel - Threaded 13.5x1 LH Each VPSK Tactical barrel is machined from ordnance grade steel, heat treated then nitrided inside and out. This is the finest threaded replacement barrel for the HK VP9SK 9mm pistol, ideal as...HKP-19262$225.00 -
B&T HK MP5 9mm Barrel - Threaded 1/2x32 - 3-Lug
B&T Brugger & Thomet
$449.95B&T HK MP5 9mm Barrel - Threaded 1/2x32 - 3-Lug New from B&T Switzerland, this cold hammer-forged (CHF) and nitrided barrel is manufactured to exact HK factory specifications exclusively for MP5 models. B&T, a trusted partner of H&K...HKP-17956$449.95 -
B&T TP9/MP9 Barrel Guide & Suppressor Adapter
B&T Brugger & Thomet
$419.95B&T TP9/MP9 Barrel Guide & Suppressor Adapter Swiss B&T manufactured barrel adapter assembly for the TP9 & MP9 & SSP models. Allows the user to install current B&T model suppressors on earlier modeled TP9, SSP, & MP9...HKP-17299$419.95 -
H&K HK G36C Incomplete Gas Piston Rod - Black
H&K Heckler & Koch
$49.95H&K HK G36C Incomplete Gas Piston Rod - Black A must have item for HK G36C conversions from SL8's or for spares for your G36C. New HK German factory part.HKP-17009$49.95 -
H&K USPC 9mm Barrel
H&K Heckler & Koch
$234.95H&K USPC 9mm Barrel Compatible With HK USPC 9mmHKP-01526$234.95 -
On Sale
HKP Glock 19 9mm Fluted Barrel - Threaded 1/2x28
HKP HK Parts
Now: $99.95Was: $239.95HKP Glock 19 9mm Fluted Barrel - Threaded 1/2x28 The Adams Arms Glock 19 9mm Match Grade Box Fluted Barrel is an improved drop-in fit designed for enhanced accuracy with no gunsmith fitting required. Machined to tighter tolerances, it features a SAAMI...HKP-18872Now: $99.95Was: $239.95 -
HKP HK MP5 .40 S&W Barrel - Threaded 9/16x24 - 3-Lug
HKP HK Parts
$249.95HKP HK MP5 .40 S&W Barrel - Threaded 9/16x24 - 3-Lug Newly manufactured US Made melonited nitride MP5 .40 S&W barrel that is 3-lugged and threaded with matching thread protector. This is a barrel offering that is made to the highest...HKP-16402$249.95 -
Nefarious Arms HK 416 Installation Barrel
Nefarious Arms
$154.95Nefarious Arms HK 416 Installation Barrel HK416 multitool patterned off a genuine HK 416 wrench with added upgrades Used with a traditional 1/2″ torque wrench or the plug-and-socket style torque wrench that utilizes the ball detent...HKP-21487$154.95 -
PTR HK G3/91 Tapered Barrel - Threaded 5/8x24
PTR
$229.95PTR HK G3/91 Tapered Barrel - Threaded 5/8x24 PTR manufactured US made barrel for the HK91, G3 & PTR style of firearms. This 16" barrel will allow you to add a threaded flash hider that is threaded 5/8x24 US threads. Specifications: Overall Length...HKP-19472$229.95 -
Out Of Stock
H&K 21E/23E/21/11/13 Barrel Grip Holder - German
H&K Heckler & Koch
$34.95H&K 21E/23E/21/11/13 (7.62x51/.308) & (5.56/.223) Barrel Grip Holder - German New old stock with handling marks from being bagged and shipped in bulk. German HK manufacture.HKP-16427$34.95 -
RCM HK MP5 10mm Barrel - Threaded 9/16x24
RCM
$279.95RCM HK MP5 10mm Barrel - Threaded 9/16x24 Enhance the performance of your MP5 with the RCM HK MP5 10mm Barrel. This barrel is precision engineered for superior accuracy and durability. This barrel features a 9/16x24 thread and includes a thread protector...HKP-21158$279.95