Description
The Alexander Arms PHI65ST Highlander 6.5 Grendel 11-inch 10+1 is a compact, hard-hitting rifle built for shooters who want short-barrel performance without giving up reach. Chambered in 6.5mm Grendel, this rig pairs an 11-inch straight-fluted, threaded barrel with a full-length Picatinny top rail, a polymer SBA Tactical brace, and a Black A2 grip. It ships with two magazines and a thread protector, ready to run right out of the box.
| Manufacturer | Alexander Arms |
|---|---|
| Model | PHI65ST Highlander |
| Caliber | 6.5mm Grendel |
| Barrel Length | 11 inches (straight-fluted, threaded 5/8×24) |
| Capacity | 10+1 rounds |
| Brace | Polymer SBA Tactical brace |
| Handguard | TCE Alexander Arms branded, free-float |
| Finish | Black anodized (upper receiver, rail, handguard) |
| Weight | Per manufacturer specs: 5.9 lbs (unloaded) |
| Condition | New |
Key Features
- 11-inch Straight-Fluted Barrel – WHY IT MATTERS: The fluting sheds weight without sacrificing barrel rigidity, so you get faster handling and better heat dissipation during strings of fire.
- Threaded Muzzle (5/8×24) – WHY IT MATTERS: You can mount a suppressor or muzzle brake directly – no adapter needed – making this a natural host for quiet shooting or recoil reduction.
- Full-Length Picatinny Top Rail – WHY IT MATTERS: Mount optics, red dots, or magnifiers exactly where you need them, without adapter plates or risers. Zero and go.
- Polymer SBA Tactical Brace – WHY IT MATTERS: Adjustable length and a comfortable cheek weld give you a solid shooting platform, while keeping the overall package compact enough for vehicle or home defense use.
- Two Magazines Included – WHY IT MATTERS: Spare mag means less reloading at the range or in a class. Load one, keep one in reserve.
Who It’s For
This Highlander is for the shooter who wants a lightweight, short-barreled rifle that still reaches out to 600+ yards with the 6.5 Grendel cartridge. It’s ideal for home defense, truck guns, and hunters who stalk heavy cover and need a compact carbine. New gun owners will appreciate the low recoil and flat trajectory of the Grendel, while experienced shooters will like the modular rail and threaded barrel.
Pros & Cons
- Pro: 6.5 Grendel delivers excellent long-range ballistics from an 11-inch barrel – you get more energy and less drop than 5.56 or .300 Blackout at distance. According to Alexander Arms specs, the 11-inch barrel is optimized for this round.
- Pro: Straight-fluted barrel keeps weight low (under 6 pounds) while maintaining accuracy. One specific measurement: the barrel is 0.750-inch gas block journal, which is standard for heavy-profile barrels.
- Con: 6.5 Grendel ammo is less common and more expensive than 5.56 – plan on stocking up online or at specialty shops. It also runs about 50-70 cents per round for plinking loads.
Comparison vs. Competitors
| Feature | Alexander Arms PHI65ST Highlander | Geissele Super Duty 11.5″ 5.56 | Zev Technologies OZ9C 9mm Pistol |
|---|---|---|---|
| Caliber | 6.5mm Grendel | 5.56 NATO | 9mm Luger |
| Barrel Length | 11 inches | 11.5 inches | 4.5 inches |
| Weight | 5.9 lbs | 6.2 lbs | 1.7 lbs (unloaded) |
| Action | Semi-auto, direct impingement | Semi-auto, direct impingement | Semi-auto, striker-fired |
| Best Use | Long-range compact carbine | General-purpose duty rifle | Concealed carry pistol |
The Alexander Arms Highlander fills a unique niche – it’s a compact rifle that hits like a full-size bolt gun. The Geissele is a great general-purpose 5.56, but it can’t match the Grendel’s trajectory past 400 yards. The Zev is a pistol, not a rifle, so it’s apples-to-oranges for range, but it wins on concealability.
FAQ
Does the Alexander Arms PHI65ST Highlander come with a brace or stock?
It ships with a polymer SBA Tactical brace, which is adjustable for length. It’s classified as a pistol brace, not a stock, so you can use it with the 11-inch barrel without NFA paperwork (as of current law).
What magazines does this rifle use?
It comes with two 10-round magazines designed for 6.5 Grendel. They are standard AR-15 pattern magazines, but you should use magazines specifically marked for 6.5 Grendel to ensure reliable feeding – standard 5.56 mags may cause feeding issues with the Grendel’s case shape.
Can I mount a suppressor on the barrel?
Yes. The barrel is threaded 5/8×24, which is the standard thread pitch for 6.5mm and .30 caliber suppressors. Just screw on your suppressor or mount a muzzle brake. The barrel is 11 inches, so a suppressor will keep the overall length manageable.
Is the 6.5 Grendel good for hunting?
Absolutely. The 6.5mm Grendel is excellent for deer, hogs, and varmints out to 400 yards. The 11-inch barrel will still deliver enough velocity for clean kills with quality hunting ammunition. Check your local hunting regulations for pistol-length barrel requirements.
What is the trigger pull weight?
The rifle ships with a standard mil-spec trigger. Per manufacturer specs, it is not upgraded, so expect a pull weight around 6-7 pounds. You can swap it out with any AR-15 trigger group if you prefer a lighter or adjustable trigger.
Why Buy from Us
- ✅ Nationwide delivery to all 50 states
- ✅ Ships within 1-2 business days
- ✅ 30-day return policy
- ✅ Secure checkout with encryption
Last updated: April 2026
Shop more in our Semi Auto Rifles category, or check out our AR Uppers & Barrels for build projects.
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