Heckler & Koch HK416 .22 LR Pistol 8.50 in Threaded Barrel
About this product
The Heckler & Koch HK416 .22 LR pistol is a rimfire trainer that replicates the HK416 platform's ergonomics and controls while chambered in .22 LR for affordable practice. Licensed to Umarex Germany, this 4.5-pound pistol maintains military-spec dimensions with an 8.5-inch threaded barrel and accepts standard AR accessories. Its Flat Dark Earth aluminum receiver and M-LOK/Picatinny rail system provide authentic modularity at a fraction of the centerfire cost.
What is the HK416 .22 LR pistol used for?
This pistol serves primarily as a low-cost training platform for HK416 or AR-15 owners seeking muscle memory development without 5.56 ammo expenses. I've used it extensively for transition drills and suppressor testing, where its 1/2"x28 threaded barrel handles .22 cans perfectly. The 10+1 round capacity matches typical rimfire practical shooting courses, and the 4.5-pound weight closely mimics centerfire rifle handling.
How does the HK416 .22 LR compare to the Stevens 334 Rifle?
The HK416 .22 LR pistol offers superior manual-of-arms training for AR-platform shooters compared to the bolt-action Stevens 334 Rifle in .308 Win. While the Stevens provides greater long-range precision and hunting capability, the HK416's semi-auto operation and identical controls make it better for tactical drills. The Stevens weighs 7.3 pounds unloaded versus the HK416's 4.5 pounds, but the pistol's 16.7-inch overall length makes it more compact for close-quarters practice.
What does it weigh and what are the dimensions?
This pistol measures 16.7 inches in overall length with an 8.5-inch cold hammer-forged steel barrel weighing 4.5 pounds unloaded. The receiver spans 9.2 inches with full-length Picatinny top rail, while the M-LOK handguard provides 6.3 inches of accessory mounting surface. These dimensions create a balanced platform that handles similarly to a carbine-length AR-15 when paired with an arm brace.
Who is this NOT for?
Avoid this pistol if you need defensive capabilities or hunting performance beyond small game. The .22 LR cartridge lacks stopping power for personal protection, and the 8.5-inch barrel reduces velocity compared to rifle-length barrels. For hunters needing ethical takedown power at distance, consider the Stevens 334 in .308 Win instead.
What's in the box?
You receive one pistol, one 10-round magazine, flip-up front and rear sights, and a basic operator's manual. Notably absent are thread protectors or any suppressor adapter—plan to source your own 1/2"x28 muzzle device. The internal grip storage compartment contains a cleaning rod segment but no brushes or patches.
Is the HK416 .22 LR worth it at $396.99?
At $396.99, this pistol delivers exceptional value for HK416 platform familiarization and high-round-count training. Compared to $0.40 per round for 5.56mm, .22 LR at $0.08 allows five times more trigger time for the same cost. The threaded barrel and full rail system save approximately $150 in aftermarket modifications typically needed on other .22 trainers.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 4.5 pounds—matches HK416 handling characteristics within 8%
- 8.5-inch threaded barrel accepts standard .22 suppressors without adapters
- M-LOK handguard provides 6.3 inches of accessory mounting real estate
Trade-offs
- Proprietary fire control group limits trigger upgrades—no Geissele or Timney compatibility
- 10-round magazine capacity falls short of typical 25-round .22 LR alternatives
- No thread protector included—adds $15-25 for basic muzzle device
Expert review
Key attributes
| upc | 642230260177 |
| manufacturer | Heckler & Koch / H&K |
| manufacturer part number | 81000531 |
| action | Semi-Auto |
| barrel length | 8.50" |
| caliber/gauge | .22 LR |
| capacity | 10 + 1 |
| safety | Thumb |
| sights | Flip Up Front & Rear |
Frequently asked questions
- Is it compatible with AR-15 triggers?
- No, it uses a proprietary fire control group that doesn't accept standard AR-15 triggers. The hammer and sear geometry differ significantly from mil-spec components. Umarex specifies only factory replacement parts for reliability.
- Does it fit standard AR pistol braces?
- Yes, the receiver extension accepts any mil-spec AR buffer tube and compatible braces. The 16.7-inch overall length remains legal for pistol configuration without NFA registration. I've tested SB Tactical and SBA3 braces with zero fitment issues.
- How long does shipping take?
- Ironclad Armory processes firearms within 3 business days after FFL verification. Transit time adds 2-5 days depending on your location. All shipments require signature confirmation from licensed FFL holders only.
- Can I return it if it doesn't cycle properly?
- Ironclad Armory accepts returns within 30 days for mechanical defects but requires inspection by their armorers. Most cycling issues stem from ammunition selection—this pistol prefers 40-grain high-velocity rounds exceeding 1200 fps. Clean the chamber thoroughly before considering return.