22LR Meltdown Torture Test

Am Shooting Journal ^ | 12/18/2019 | E V8888

[w1n1]

Youtube shooting sensation Erick of IV8888 has a strange little CMMG .22 caliber machine gun. - This little rig here looks like something that almost belongs in a Kurt Russel (Snake Plissken) movie.

This CMMG 22 upper sports a 4 inch barrel with KG made Swarm, this is an all-titanium can. A special firing pin was also used instead of the standard which usually breaks after 1300 rounds. Basically, this is a torture test, they're going to run it to see what happens. This will also be a test for the suppresssors as well.

All loaded up with 25-round shot mags, 50-round drums, and a couple of 32s. A quarter of the way through full auto shooting, Erick takes the temperature of the gun. The suppressor is 222 degrees. The barrel… 301 degrees. The chamber… 149 degrees. The upper receiver, 161 degrees. The barrel nut… 275 degrees. This cool little 22 CMMG shot an estimate of 2168 (almost 2200) rounds with some minor rimfire finicky (not sure if that is a word) and some lead build up. This Plissken gun ran and ran. Have a look at the full 22lr meltdown test here.

[Manly Warrior]

Yeah, 22s will never “melt” down. Most of the “heat” is lost through the ejection of the spent case, very little thermal transfer and barrel mass/radiance is great enough to over come much thermal gain.

But, neat test. 22LR ARs have come a long ways in terms of reliability from the original Mk261 insert systems or “sorta looks like an AR” Mitchells.

Several semi-custom smiths make really competitive AR 22s- that can compete head to head on the small bore range with Anshutz & Hammerelli position rifles.

[Lurker]

Ian of Forgotten Weapons did a nice test of a drum fed full auto .22 LR. Looked like a heck of a lot of fun.

L

[Yo-Yo]

But, neat test. 22LR ARs have come a long ways in terms of reliability from the original Mk261 insert systems or “sorta looks like an AR” Mitchells.

I've had decent luck with CMMG drop in BCG conversion kits. It's rimfire, so don't expect flawless operation. Expect to need to use hyper velocity .22LR (I use CCI Mini-Mags exclusively.)

Also don't expect tack-driving accuracy. The .223/5.56 barrel is just a tad oversized for good accuracy from a .22LR. If you are looking for accuracy, then a dedicated .22LR upper is the way you need to go.

[null and void]

The bolt is… 70 degrees. The chamber is… 70 degrees. The barrel is… 225 degrees. The barrel nut is 230, the can is… 237 degrees.

Fahrenheit or Celsius? I’m guessing °C, else the bolt and chamber never got above room temp, but really guys, how hard is it to type a single letter, whether C or F?

[real saxophonist]

You expect journalistic accuracy from ‘AM Shitting Urinal’?

[null and void]

Touché!

[mylife]

my buddies built this.. :)

https://www.youtube.com/watch?v=x8IFTa2ulA4&feature=emb_logo

[Paal Gulli]

Just when you thought American Shooting Urinal couldn’t get any more worthless, ... this.

[Manly Warrior]

Like I stated, the brass case carries much/most of the heat of explosion with it. very little left to heat the bolt ( most 22s never get hot), breech or even bbl. The suppressor probably is the biggest cause of heat build up forward, as it retains powder gases longer, The BBL heated due to friction, not much else.

5 9ths, or 9 5ths, +- 32 F, whatever it takes ;>)

[Manly Warrior]

Indeed. The 224 diameter bbl of the centerfire 223 (224 bullet d) compared to the 222 diater of the rimfire makes for musket ball like exit.

Several makers ( White Oak, Keystone, Compass Lake) make precision dedicated 22LR AR match or service rifle clones- they will shoot with bolt target guns.

One of our state High Power shooters took 2nd in our state rimfire 3 P match tournament last summer with a 20” AR A4 with fixed/pinned AR sights. Made a lot of Anschutzooters wonder if their $3500 64s were worth it. Total investment- $1200 plus his Service Rifle lower. It really liked plain Jane Hivel CCIs

[MAAG]

I remember walking to K Mart in te early 70’s with one of my freinds older brother on his 18th b-day and buying a ruger 10-22 and we stopped near the local KSU airport to try it out and it was full auto no matter how you pulled the trigger, Pull the trigger once and it would fire all ten, I was like awesome, and he was so pissed and took if back for another one.

[Magnum44]

Bummer, I was hoping this was another 9mm vs 45 thread...

[Chode]

i remember back in the 80's a belt fed .22 in SOF or GungHo that looked like an aluminum billet receiver with cooling fins like a motorcycle jug that ran 1000+RPM

wonder what happened to it?

[w1n1]

think I remembered that, do you know which copy & year that was? I have some old SOF mags in the garage.

[Chode]

nope... but now i gotta look thru mine too

it was only about a foot long with a vertical foregrip for two handed shooting

[archy]

Yeah, 22s will never “melt” down. Most of the “heat” is lost through the ejection of the spent case, very little thermal transfer and barrel mass/radiance is great enough to over come much thermal gain.

The weak point of most AR-15/M16 Stoner family rifles is the gas tube. Burn a hole through it- or burn it in half- and you now have a boly-action, straight pull rifle.

The .22 conversion units for the AR family don't require a gas tube, and as stated above, most of the heat goes out of the action when the fired case is ejected. And with the shorter travel of the bolt to feed and eject the shorter cartridge, rates of fire in excess of 1200 rounds per minute/ 20 shots per second were not uncommon.

While I was at the Navy's NWSC Crane small arms shop in the early 1980's, we modified a M16A1 with a water-cooled jacket like a WWI water-cooled machinegun. The idea was to keep the gas tube cool, but it also served that purpose for the barrel itself.

[OKSooner]

Notice that self-defined YouTube shooting sensation Eric V8888 is also the author of this dreck.

Suppose he gets a lot of chicks this way? /S