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With big game hunting season in full swing, I’ve spent a good amount of time with the GLOCK 20C I’m accustomed to carrying when recreating outdoors. This pistol has sustained its fair share of modifications, yet every time I’d carry it my thoughts would drift to a quiet place. I had an itch to push 10mm through a tube.

So as soon as the government granted me permission to access a Dead Air Ghost 45M silencer I began looking for a threaded option to replace the GLOCK’s factory 4.5-inch ported barrel.

Based on price, recommendations, and availability I quickly decided to give Lone Wolf Distributors’ Alpha Wolf fluted barrel for M/20 (10mm) a try. And I’m glad I did.

To begin with, I’m in the camp that believes the 10mm cartridge is great not only for defensive purposes, but also for hunting and plinking. The ability to do these activities quietly can be a big plus.

And the fact that the Alpha Wolf barrel is prominently rated for jacketed ammunition as well as cast lead and plated ammunition helps alleviate any worries when shooting typical sporting and target cartridges.  It also works with absolute accuracy and combat reliability with self-defense loads too.  In short, it’s designed to perform well with a multitude of ammunition types and brands.  Not only that, but it’s made in the USA.

Out of the box, the 10mm barrel looks and feels great. It is cleanly and crisply machined and evenly finished.

The Alpha Wolf M/20 barrel is compatible with all generations of GLOCK 20.

Just forward of the chamber, however, the barrel begins to make its departures from the factory look with eight cuts of fluting running the majority of the length of the bore.

This fluting helps slightly reduce the barrel’s weight and provides more surface area for heat dispersion. And, of course, it looks cool.

An unintended — but welcome — consequence of dropping the Alpha Wolf barrel into a “C” model G20 is that the fluting matches up surprisingly well with the cuts in the slide, creating a neat aesthetic.

Lone Wolf’s 9/16×24 threading at the muzzle is also very clean and crisp. Furthermore, the barrel’s finish thinly coats the threads without harboring any residual material in its crevices.

The included thread protector is a great match for the barrel and snugs onto the threads without any sloppiness. Its knurled surface isn’t sharp, but does provide more than enough texture for easy removal.

Alpha Wolf barrels are heat treated to the RC 40-42 standard before being coated in a premium Salt Bath Nitride (SBN). The result is a thin matte black finish that is consistent across the barrel and carries a surface hardness rating of RC 60.

However, after just two installations, a few soft manipulations of the slide, and removal/installation of the thread protector the SBN finish began to chip off in several areas (above), which was slightly disappointing.

The above image also provides a good view of the barrel’s button rifling at the muzzle.

Lone Wolf didn’t stamp or engrave their logo all over the barrel hood, turning it into an advertisement like some companies do. Instead, they simply and plainly laser engraved the name, number, and caliber.

With the Lone Wolf logo and information on the left side of the barrel hood it becomes hidden once installed. This leaves you with a nice, clean look that falls in line with the contours of a factory barrel.

After coating, the Alpha Wolf’s feed ramps are well-polished and quite slick. A three-stage honed bore follows the polished feed ramp.

At the range, mags were loaded with a variety of 10mm Auto ammunition, including:

Freedom Munitions 180-grain Round Nose Flat Point (Copper Plated, New)

• Sellier & Bellot 180-grain FMJ

Underwood Ammo 220-grain Hard Cast Flat Nose

Throughout the course of testing, both the Freedom Munitions and Seller & Bellot cartridges ran flawlessly when paired with the appropriate recoil spring assembly; mostly a Lone Wolf 20-pound assembly.

Unfortunately, the Underwood Ammo 220-grain HCFN had regular failures to feed in the Alpha Wolf barrel, as is also fairly common with GLOCK’s factory barrels. Stepping-down to the 20-pound spring from the 22-pound spring seemed to help slightly, but still not enough to consider it a reliable combination. The particular Underwood loads used in testing were uncoated; Underwood now makes a version with Hi-Tek coated HCFN 21 BHN bullets, which may help.

25-yard groupings from GLOCK 20C factory ported barrel (left) and Lone Wolf Alpha Wolf M/20 barrel (right).

At 25-yards with FM and S&B 180-grain rounds my five-round groupings weren’t exactly noteworthy and the Alpha Wolf barrel showed only a negligible increase in performance over the factory compensated GLOCK barrel.

Across an average of five, five-round groups per type of ammunition, the Lone Wolf Alpha Wolf barrel delivered 2.5-inch groups while the GLOCK factory ported barrel registered 2.6-inch groups (best groups shown above).

Somewhat surprisingly, Underwood’s HCFN consistently provided sub-2-inch groupings at 25 yards out of the Alpha Wolf. If this ammo fed reliably I’d be inclined to leave the threaded barrel in permanently and carry a silencer with me when I’m in the woods.

Regardless of ammunition selection the Alpha Wolf 10mm barrel performed slightly better than factory GLOCK barrel. And considering the Alpha Wolf’s primary purpose is to support the use of a silencer, any increase in accuracy is a plus.

After printing groupings it was finally time to run the barrel the way it was designed; suppressed. Dead Air’s Ghost 45M silencer threaded onto the Alpha Wolf precisely and snugged tight to the barrel; a fantastic match was made.

And it ran as sweet as can be — pleasantly perforating targets downrange to a soundtrack of bouncing brass.

Over the course of several hundred rounds of 180-grain target ammunition Lone Wolf’s M/20 Alpha Wolf barrel spit lead flawlessly. The Ghost 45M stayed snug and when the ammunition was gone the warm silencer came off the barrel’s threads without undue effort from a gloved hand.

And no matter the configuration of the can – short or long – shooting the GLOCK 20 suppressed proved reliable and even more fun than I’d hoped.

The Alpha Wolf M/20 barrel is an accurate, fluted barrel that looks great and sports an excellent 9/16×24 threaded muzzle. My biggest disappointment with the M/20 barrel is the way the SBN coating chips off and how quickly it wears with use. And I was also hoping to find better reliability with 220-grain HCFN loads, but this wasn’t the case with the Alpha Wolf.

However, it’s funny how once you’ve got a silencer on the end of a G20 and 180-grain FMJ is sailing down range, these concerns are diminished. Overall, I found Lone Wolf’s Alpha Wolf M/20 (10mm) threaded barrel to be an excellent true drop-in option for those looking to tame their 10mm GLOCK 20.

Specifications: Lone Wolf Alpha Wolf G20 Threaded Barrel (10mm)

Material: Certified, stress relieved 416 stainless steel
Finish: Salt Bath Nitride (SBN)
Length: 5.2″
Thread Pitch: 9/16 x 24
Twist Rate: 1:16
Extras: Fluting
Compatibility: GLOCK 20, All GLOCK generations
Country of Origin: U.S.A.
Price as reviewed: $159.95 MSRP

Ratings (out of five stars):

Design: * * * *
The Alpha Wolf M/20 threaded barrel’s blocky hood is right in-line with GLOCK’s design, yet the eight cuts of fluting that encompass the barrel and the crisp, clean threading at the muzzle are an excellent departure from the factory look. Lone Wolf also takes the humble road, hiding their logo and the model number on the left side of the barrel hood, allowing for a very clean look.

Durability: * * * 
The M/20 can certainly handle the pounding of magazine after magazine of 10mm Auto and its clean threads accept and hold a silencer as good as any other. When not in use, the threads are easily covered with the provided thread protector. However, its Salt Bath Nitride finish is thin and looks great out-of-the-box, but it is also prone to chipping and wears quickly.

Functionality: * * * *
Without a doubt, the Alpha Wolf barrel is as accurate, or more accurate, than a factory GLOCK 20 barrel and it performs equally well suppressed and un-suppressed. Both 180-grain and 220-grain loads ran, but cartridges with Hard Cast Flat Nose projectiles proved unreliable.

Overall: * * * *
A true drop-in threaded barrel for the GLOCK 20, the fluting on Lone Wolf’s Alpha Wolf M/20 barrel will catch your eye and its accuracy and precise threading will keep you squeezing the trigger until you are out of ammunition or your silencer is red-hot.

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  1. “Lone Wolf didn’t stamp or engrave their logo all over the barrel hood”

    No more little werewolf furry guy on LWD’s new stuff? *worldwide yiffing grinds to a halt*

  2. ……barrels are heat treated to the RC 40-42 standard before being coated in a premium Salt Bath Nitride (SBN). The result is a thin matte black finish that is consistent across the barrel and carries a surface hardness rating of RC 60.

    With that said, is a barrel with RC 40-42 hard enough to last? If the SBN wears off then would I really lose anything by blasting it off and polishing it to a mirror shine? Maybe blast and cerakote?

    • WTF are “TTAG points”?

      I’m sure I’m negative 10 billion…

      • I used to post with another name but someone else started using it and I didn’t want to be known/confused with that idiot. A post that one of the guys put up years ago……(not RF).…….. asked a question and whoever got it right got 5 ttag bonus points. I was half right. Hence the 2.5 ttag bonus points. Speaking of RF, Dan please ask him what was wrong with that pic on I-35.
        Anybody know about the RC of the barrel?

    • Being a Gunsmith Hot Salt Nitride Barrel bluing doesn’t chip. It’s not like other finishes that are sprayed on ie Duracoat or Cerakote, so the only way the finish can be altered is by scratching. Painted finishes chip. You gotta understand the process to know which finish will act as chipping. From your photo’s your finish appears to be a Sprayed on finish with Duracoat( the name is misleading) and Cerakote (being more resistant to chipping because it is a baked on Ceramic finish). Without having one in hand, I can’t tell which one it is. Just a little FYI. I wouldn’t want a good hot salt Nitride finish to be falsely spoken about. It is probably the best finish to protect against solvents and short term rain moisture.

  3. Theres a reason its $159. Not impressed with mine for the 30S, feed ramp edge showed fracturing after a few Buffalo Bore, sent it back they ground it a little, still pretty flimsy and does not hold up well, after a few hundred rounds looks like I banged nails with it…
    This one at least looks better supported, but time will tell.

  4. Changing a Glock barrel is no fun, you’ve got to get a three day sucker like a 1911

  5. They probably put a phosphate finish over the SBN like Glock did over their Tenifer. It’ll wear off but the SBN will never wear off unless you take some carbide or diamond tipped tools to it. I could be wrong but I think that is the likely story.

  6. Crappy barrels won’t make your groups shrink, practice will. With the stock GLOCK barrel in I shot just as tight if not tighter groups, much to my surprise. But I guess spending hours at the range and a couple thousand rounds pay off.

  7. In Basic Training I could tear down, rebuild and function test two 1911’s in the time most could barely do one, DI’s made bank on me, replacing a GLOCK barrel is like breathing.

  8. In my Glock 21, the Storm Lake 10mm conversion barrel and 20 lb Wolff recoil spring feeds and cycles everything I’ve fed it, from the softest white box to Buffalo Bore’s 220gr hard cast flat nose (703 ft-lbs of boar and bear persuader).

    Alas, they offer no threading option – I wonder why?

  9. The barrel is going to show wear. Not a big deal IMO. I only use aftermarket barrels for cast bullets or range. I find reliability drops. For upper end of 10mm in a Glock aftermarket is a must. Can’t wait for my 10mm XDM so I can dump the Glock.

  10. I’ve never owned a suppressed pistol. What are the options for carrying it? It looks like an awkward size to me.

  11. What made you choose the Lone Wolf over the KKM? Everything I’ve read leads me to believe the KKM is a higher quality barrel and I actually chose it for my 40MOS (7 inch).

  12. Having multiple FTF’s with the 6.6 inch version with Underwood. Going to try the standard recoil spring and if that does not solve the issue, I will stick with KKM. Not to mention this barrel was on clearance when I purchased it.

  13. I bought a Lone Wolf barrel for my new Glock G40 MOS and it would not feed two different brands of name brand ammo. I sent it back for a refund and bought a KKM barrel instead. The KKM worked flawlessly. Spend the extra money and buy the KKM. There’s no “finish” to scrape or show wear because the barrel is polished stainless steel.

  14. I recently upgraded my G20 Gen3 with a LW threaded barrel and tested it last night. Almost all fired shots failed to fully cycle the slide and jammed. I had to pound up from underneath the magazine in order to have the slide fully recycle (finish its forward progress and load the next round). It appears the cartridge was sticking on the bottom of the barrel intake.

    Has anyone else experienced this? Is this a known issue?


  15. Intersted with 10 mm glock 40 thread barrel, are you foresee exportation outside USA ?

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