Description
Item Description
Bryant Ridge Co. is pleased to present this semi-automatic rifle marketed as a small game and pest control rifle, for a penny-start auction; this is the Heckler & Koch HK300!
SPECIFICATIONS:
Manufacturer: Heckler & Koch
Model: HK300
Serial: 005712
Caliber: .22 WMR (Winchester Magnum Rimfire)
Finish: Blue
Barrel Length: 19.7" Polygonal Rifling
Optics/Sights: Adjustable Blade on Ramped Base Front with Fixed Notched Rear and Scope Base on the Receiver
Stock/Grips: Checkered Walnut Stock with Cheekpiece
Action: Semi-Automatic Rifle
Markings: Standard
Bryant Ridge's Analysis:
The Heckler & Koch HK300 is a well-built, semi-automatic sporting rifle introduced by H&K in the 1970s as a purpose-designed .22 WMR (.22 Winchester Magnum Rimfire) platform that brings the firm’s engineering rigor to small-game and varmint work. Mechanically, the HK300 uses a locked/energy–transfer–style action derived from H&K’s longer-running long-gun design experience rather than a simple blowback, which helps the rifle function reliably with the higher-pressure .22 WMR round and contributes to consistent extraction and ejection. The rifle typically features a long, heavyish barrel (around 18.5–19.7? depending on source and production year), a detachable magazine (2, 5 or larger capacities reported across variants and imports), and a traditional sporting-rifle fit with a checkered hardwood stock, adjustable sights and a receiver provisioned for optics — attributes that made it attractive to hunters and shooters who wanted a premium rimfire that handled more like a centerfire sporter. Early production and HK literature emphasize the rifle’s originality and focus on producing a reliably functioning semi-automatic in .22 WMR, a niche relatively underserved by competitors at the time. In practice, the HK300 earned praise for solid fit and finish, reliable feeding with factory magazines, and accuracy that often outperformed typical rimfire trail rifles of the era — many owners report sub-MOA potential with careful ammunition selection and a clean, well-tuned example. Its strengths make it well-suited for small-game hunting, predator control, and precision plinking, where the extra velocity and energy of .22 WMR over .22 LR matter. Tradeoffs include limited contemporary parts/support compared with mass-market rimfires (making careful inspection and attention to magazine and extractor condition important for buyers of used examples), relative scarcity in some markets, and the usual ballistic limits of a short-to-mid-length rimfire barrel versus larger centerfire calibers — factors that affect long-range terminal performance. Today, the HK300 is a desirable rifle for collectors and shooters who appreciate H&K-level fitment in a magnum rimfire package; used-market pricing and availability vary, but the rifle’s reputation for build quality and the uniqueness of a well-executed .22 WMR semi-auto continue to keep demand steady among enthusiasts.
Contents:
Model: HK300
Serial: 005712
Caliber: .22 WMR (Winchester Magnum Rimfire)
Finish: Blue
Barrel Length: 19.7" Polygonal Rifling
Optics/Sights: Adjustable Blade on Ramped Base Front with Fixed Notched Rear and Scope Base on the Receiver
Stock/Grips: Checkered Walnut Stock with Cheekpiece
Action: Semi-Automatic Rifle
Markings: Standard
Bryant Ridge's Analysis:
The Heckler & Koch HK300 is a well-built, semi-automatic sporting rifle introduced by H&K in the 1970s as a purpose-designed .22 WMR (.22 Winchester Magnum Rimfire) platform that brings the firm’s engineering rigor to small-game and varmint work. Mechanically, the HK300 uses a locked/energy–transfer–style action derived from H&K’s longer-running long-gun design experience rather than a simple blowback, which helps the rifle function reliably with the higher-pressure .22 WMR round and contributes to consistent extraction and ejection. The rifle typically features a long, heavyish barrel (around 18.5–19.7? depending on source and production year), a detachable magazine (2, 5 or larger capacities reported across variants and imports), and a traditional sporting-rifle fit with a checkered hardwood stock, adjustable sights and a receiver provisioned for optics — attributes that made it attractive to hunters and shooters who wanted a premium rimfire that handled more like a centerfire sporter. Early production and HK literature emphasize the rifle’s originality and focus on producing a reliably functioning semi-automatic in .22 WMR, a niche relatively underserved by competitors at the time. In practice, the HK300 earned praise for solid fit and finish, reliable feeding with factory magazines, and accuracy that often outperformed typical rimfire trail rifles of the era — many owners report sub-MOA potential with careful ammunition selection and a clean, well-tuned example. Its strengths make it well-suited for small-game hunting, predator control, and precision plinking, where the extra velocity and energy of .22 WMR over .22 LR matter. Tradeoffs include limited contemporary parts/support compared with mass-market rimfires (making careful inspection and attention to magazine and extractor condition important for buyers of used examples), relative scarcity in some markets, and the usual ballistic limits of a short-to-mid-length rimfire barrel versus larger centerfire calibers — factors that affect long-range terminal performance. Today, the HK300 is a desirable rifle for collectors and shooters who appreciate H&K-level fitment in a magnum rimfire package; used-market pricing and availability vary, but the rifle’s reputation for build quality and the uniqueness of a well-executed .22 WMR semi-auto continue to keep demand steady among enthusiasts.
Contents:
This example will ship with the soft case as pictured above!
Return Policy:
We gladly offer a 3 day unfired inspection policy from the time that the firearm is delivered to your FFL. Refunds are available for all qualifying orders.
Shipping Details
Handgun Standard Shipping with Insurance $50.00
Long Gun Standard Shipping with Insurance $70.00
Any orders placed with magazines that are not compliant with your state, county, or city regulations will not ship with your order.
We strive to ship orders within the close of the following business day after payment and documentation is received.
Payment Details
We accept all forms of Payment including Personal Check, Business Check, PO Money Orders, Certified Check, Etc.
Please note we place a 7 business day hold on shipment, for all non-certified payments.
Payment MUST be received within 14 days.
Return Policy
We gladly offer a 3 day unfired inspection policy from the time that the firearm is delivered to your FFL. Refunds are available for all qualifying orders.
Additional Details
Our #1 priority is customer satisfaction. We want to build a lasting trust in the relationship with our customers, so that you will always look to us for all your firearms needs. If you have any issues with your transactions please contact us, and we will work with you to resolve any issues you may have. We greatly appreciate your trust in us and we look forward to fulfilling all your future firearm needs.
Bryant Ridge also reserves the right to cancel any sales that may occur while gunbroker.com is experiencing technical issues that affects the entire site or a complete site outage, within an hour of the auction ending.
We have an amazing inventory of classic and collector firearms that we are adding to Gunbroker daily. Stay up to date on all of our latest auction by adding us to your favorite sellers list.
About Us
From a small town hobby, to a leader in the investment and collector grade firearms industry. Bryant Ridge Firearms is here to offer the best in quality and customer service when you are looking to unload your collector grade firearm collection.
