HKP Blog

Few pistols in the modern striker-fired market carry the same reputation for precision engineering and duty-grade reliability as the Heckler & Koch VP9. Since its release, the VP9 has firmly established itself as one of HK’s flagship sidearms built for professionals, refined for enthusiasts, and engineered to outperform in every measurable category.    A Legacy of German Engineering  The VP9 (“Volkspistole”) continues HK’s tradition of innovative pistol …

Learn about this iconic rifle: The Heckler & Koch G3 is a rugged 7.62×51mm NATO battle-rifle built on a proven roller-delayed blowback system — a workhorse adopted worldwide, known for simple, reliable mechanics, modularity, and legendary military pedigree. The HK91 variant is the semi-automatic version that has been converted from the G3 platform. Specs: Caliber: 7.62×51mm NATO (standard). Operating system: Roller-delayed blowback. Standard barrel lengths: ~16.5–20& …

The HK MP5 platform, including variants like the SP5, MP5K, SP5K, and even the MP5 22LR, enjoys immense popularity for its reliability and iconic style. Choosing the right trigger is important depending on your application. Let’s break down the differences. Basic Functionality Single‑stage trigger: One continuous pull from rest to break. There may be some pre‑travel or creep depending on the design, but functionally you pull and it breaks at the set weight. Reset is a single, usually sho …

What an MP5 Parts Kit Is (and Isn't) An MP5 parts kit bundles key subassemblies and small parts into a single package. Purchasing a parts kit saves time and money versus sourcing components individually.  Most importantly, parts kits are comprised of verified-compatible components thereby taking the guesswork out of the game. But parts kits are not firearms, because kits do not include a formed receiver. [1][2] Parts kits offer immense flexibility, not only in overall configuration, but in …

Why Does M-LOK Take the Win? To incorporate Picatinny mounting points in a handguard design, material must be added, creating additional weight and bulk. Conversely, adding M-LOK attachment points requires the removal of material, allowing the handguard to retain its outer dimensions while reducing weight. Slimmer grip diameter Better heat dissipation Lighter overall weight Time for a Qualifying Statement And by time, we mean high noon, 12 o’clock, right on top. Although M-LOK is, in our …

Do You Know What Thread Pitch Matches Your HK Barrel? When upgrading or modifying your HK (Heckler & Koch) firearm with a suppressor, compensator, or muzzle brake, the most important detail is the barrel thread pitch. The wrong threads can cause unsafe alignment, damage, or failure. This page lists factory thread pitches for popular HK models, plus common US-threaded alternatives and adapter tips. On this page What Is Barrel Thread Pitch? HK – VP9 / VP40 Series HK – P30 Series …

HK parts x s5 tactical G36C Parts Kit Build Guide If you have been looking to put together a proper HK G36C build, this is the starting point. The HKP G36C Parts Kit gives you the core components pulled straight from the G36C pattern. Pair it with the S5 Tactical SG-36 Receiver and you have the bones for a reliable, compact 5.56 rifle that runs clean and is easy to maintain. This guide covers the essentials, what to watch for, and a few upgrades worth adding from the start. HKP G36C Parts Kit …

RECOIL x HK Parts: AP53 Buildout Breakdown We're teaming up with RECOIL Magazine to spotlight the Century Arms AP53, a roller-delayed 5.56 platform built with HK roots and modern performance in mind. RECOIL got hands-on with the AP53 and laid out exactly how it runs and handles. We're following up with a no-nonsense breakdown of how to kit it out properly using parts that are in stock, proven, and built to last. Check Out RECOIL's Full Review The AP53 Core Roller-delayed blowback 5.56 syst …

RECOIL x HK Parts: MAC 5 Buildout Breakdown Our friends over at Recoil Magazine recently took a closer look at the MAC 5 from Military Arms Corporation. Their blog walks through the firearm's development history, showing how it evolved from classic MP5 roots into a more modernized platform. The article highlights how the monolithic upper, modular design, and updated manufacturing processes differentiate the MAC 5 from other clones on the market. They also touch on aftermarket customization, op …

At HK Parts, we continually strive to push the boundaries of firearm innovation. The HK34 9mm Pistol Build Kit exemplifies our commitment, blending the agility of a pistol with the precision of a rifle, tailored for the discerning tactician.Redefining Versatility and PrecisionThe HK34 bridges the gap between two worlds. It features a 12.7" RCM barrel, threaded in 1/2x28 for maximum compatibility, and a perfectly proportioned cocking tube compatible with HK 93/33 handguards. This kit doesn’t just …