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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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 -
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 -
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 -
DTAC HK MP5SD Front End Kit
DTAC Dakota Tactical
$1,199.95Dakota Tactical HK MP5SD Front End Kit If you have wanted to convert that MP5 or SP5 to an SD but didn't know where to start, look no further. Our kit provides all necessary components (aside from suppressor) to do so. With a DTAC Cage and SD guard...HKP-21318$1,199.95 -
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 -
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.HKP-20580$239.95 -
Out Of Stock
Nefarious Arms HK 416/MR556 10.4" A3 Barrel
Nefarious Arms
$694.95Nefarious Arms HK 416/MR556 10.4" A3 Barrel Each Nefarious Arms barrel is cold-hammer-forged and chrome-lined for years of accurate shooting. Grab this expertly crafted barrel for your next SBR or pistol build. Proudly made in the...HKP-21335$694.95 -
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 -
RCM HK93 Trunnion
RCM
$64.95RCM HK93 Trunnion Made to exact factory HK specifications for the HK93, HK33 type builds. These are the best trunnions of their kind on the market. Machined to HK spec making the install painless and hassle free. The way a custom HK build it should...HKP-20807$64.95 -
Out Of Stock
H&K HK 45 German Barrel - Black
H&K Heckler & Koch
$314.95H&K HK 45 German Barrel - Black New HK45 German manufacture Cold Hammer Forged Factory Barrel. This is the perfect replacement barrel for those who have an HK45 Tactical model and want to replace the barrel with a non-threaded barrel. Compatible...HKP-14564$314.95 -
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 -
Out Of Stock
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 -
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 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 -
HKP P30 9mm Fluted Barrel - Threaded 13.5x1
HKP HK Parts
$229.95HKP P30 9mm Fluted Barrel - Threaded 13.5x1 Made from ordnance grade steel, heat treated, and finished with durable nitride. Each fluted barrel includes an O-ringed thread protector that will not loosen or fall off during range sessions...HKP-21443$229.95 -
RCM HK P2000SK .40 S&W Barrel - Threaded 9/16x24 RH
RCM
$225.00RCM HK P2000SK .40 S&W Tactical Barrel - Threaded 9/16x24 RH Each P2000 SK tactical barrel is crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for the...HKP-16740$225.00 -
RCM HK P30L .40 S&W Tactical Barrel - Threaded 14.5x1 LH
RCM
$225.00RCM HK P30L .40 S&W Tactical Barrel - Threaded 14.5x1 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 P30L ...HKP-16220$225.00 -
Out Of Stock
H&K (5.56/.223) & (7.62x51/.308) Rifle Blank Firing Adapter- HK Barrels
H&K Heckler & Koch
$29.95H&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$29.95 -
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 UMP .45 ACP Barrel - Threaded 16x1 LH
HKP HK Parts
$369.95HKP HK UMP .45 ACP Barrel - Threaded 16x1 LH This new 16.5" threaded barrel is designed for UMP or Omega firearms, with precise 16x1 LH threading. Ideal for those looking to upgrade or replace their barrel. Specifications: Overall Length 16.5" Threaded...HKP-19395$369.95 -
RCM HK MP5 10mm Barrel - Threaded 14x.75
RCM
$279.95RCM HK MP5 10mm Barrel - Threaded 14x.75 Enhance your MP5 with the RCM HK MP5 10mm Barrel, featuring precise 14x.75 threading. Expertly crafted for German MP5 models, this barrel ensures superior durability and performance. Ideal for both custom builds...HKP-21156$279.95 -
RCM HK USPC .45 ACP Barrel - Threaded 16x1
RCM
$270.00RCM HK USPC .45 ACP Barrel - Threaded 16x1 RH 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 LH...HKP-20129$270.00 -
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 -
RCM HK G3K (7.62x51/.308) Barrel - Threaded 15x1 RH
RCM
$244.95RCM HK G3K (7.62x51/.308) Barrel - Threaded 15x1 RH Manufactured to exact G3K specifications from cold hammer forged (CHF) steel, this barrel is a direct replacement for worn G3K barrels or ideal for your HKG3K build. It also counts as one US compliance...HKP-01499$244.95 -
Out Of Stock
H&K HK MR762/417/G28 Gas Block
H&K Heckler & Koch
$199.95HK German MR762 Gas Block New German HK manufacture for the HK MR762 & HK417, G28 firearm. This unit comes without the sling loops installed.HKP-17259$199.95 -
HK MP5SD 9mm Barrel - Threaded 18x1
USA
$149.95HK MP5SD 9mm Barrel - Threaded 18x1 This high-quality barrel, processed with a durable nitride finish, is precision milled to the latest specifications and features 16 flutes in the chamber. Designed to accept both factory HK and RCM suppressors, it is...HKP-20615$149.95 -
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 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 P30 .40 Cal S&W To .357 Sig Conversion Barrel - Non-Threaded
RCM
$237.50RCM HK P30 .40 Cal 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 best barrel for the HK P30 .40 S&W. This ...HKP-17505$237.50 -
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 MR762/417 Barrel Nut
H&K Heckler & Koch
$99.95HK MR762 Barrel Nut Or Socket Barrel - German HK A must have for any removal or work done to barrel as the barrel nut may need to be replaced.HKP-16597$99.95 -
H&K HK USPC .40 S&W Barrel - Black
H&K Heckler & Koch
$234.95HK USP Compact .40 S&W Barrel - 3.58" Overall Barrel Length A drop-in replacement barrel for all HK USPC .40 or .357 pistols. This is a great spare or replacement barrel. This is a must-have if you want to convert your .357 USPC to .40 cal...HKP-01413$234.95 -
HK 21/21E/23E (7.62x51/.308) & (5.56/.223) Barrel Handle
Michaels Machines
$74.95HK 21/21E/23E (7.62x51/.308) & (5.56/.223) Barrel Handle Compatible With: HK21 HK21E HK23EHKP-00244-M$74.95 -
HK UMP 9mm Barrel - Threaded - 3-Lug
Michaels Machines
$549.95HK UMP 9mm Barrel - Threaded - 3-Lug Specifications: 3Lug Threaded Compatible With: UMP 9mmHKP-02278$549.95 -
Out Of Stock
MM HK UMP 9mm Conversion Kit - 16 inch Barrel
Michaels Machines
$889.95HK UMP 9mm Conversion Kit - US-Made UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The conversion parts are drop-in, with the...HKP-02284$889.95 -
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 -
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 P30 .40 S&W Tactical Barrel - Threaded 14.5x1 LH
RCM
$225.00RCM HK P30 .40 S&W Tactical Barrel - Threaded 14.5x1 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 P30...HKP-16221$225.00 -
RCM Schneider PSG-1 Barrel
RCM
$849.95RCM Schneider PSG-1 Barrel Only the finest blanks in the industry can produce the best results on the range. Schneider Barrel Company makes that blank. This barrel will work perfectly with standard G3/91 trunnions, G3 barrel extensions, or...HKP-21193$849.95 -
H&K HK P7M13 9mm Barrel
H&K Heckler & Koch
$479.95H&K HK P7M13 9mm Barrel Brand new HK German P7M13 factory spare barrel. Cold hammer forged and the real deal. No longer made or available as all HK P7 parts are out of production. Compatible With: HK P7M13HKP-17907$479.95