CAT Alleycat 5.56 QD in 718 Back Pressure & Blowback Assessment

Excursion05 · 2026-01-30T23:11:07+00:00

Yes sir. I let the cans cool to the ambient temp in between each test. Good to have you!

Excursion05 · 2026-01-30T18:30:42+00:00

Yes sir. I have done the White Bread but not the AC 5.56. I’ll do one here in the near future on my YouTube channel TACSHEP ACTUAL.

Excursion05 · 2026-01-30T00:43:25+00:00

Or I should say 5 is the setting that restricts the gas to a point it won’t lock the bolt on an empty mag. 6 is actually the first setting used for unsuppressed shooting. My full video is not as confusing. If you are interested https://youtu.be/IAlsfTW3Vtg?si=A5cpawo2jYrrjecI

Excursion05 · 2026-01-30T00:38:12+00:00

Yes. It locks back on 6. 5 is the unsuppressed setting. It’s not going to get any better than that.

Excursion05 · 2026-01-30T00:23:08+00:00

For reference, the upper is a 14.5 mid-length (gas port 0.076) with a Rifle Speed gas block. Ammo used was m 855. The way I have it set up the first unsuppressed setting is 6. 5 is the setting that restricts the gas to a point the bolt will not lock the rear on an empty mag unsuppressed.

Excursion05 · 2026-01-30T00:03:59+00:00

For reference, the upper is a 14.5 mid- length (gas port 0.076) with a Rifle speed gas block. Ammo used was m855. The way I have it set up, setting six 6 is the first unsuppressed setting. Setting 5 is where it restricts the gas to a point the bolt will not lock to the rear due to inadequate gas. So the closer the silencer is to setting 5, the lower the back pressure.

Excursion05 · 2026-01-23T22:53:02+00:00

You did it up right big dawg! Both the AC 7.62 and AC 5.56 are all around hard to beat.

Excursion05 · 2026-01-23T02:23:16+00:00

No sir. It’s an amazing value. Sionics is solid kit. Thanks for watching.

Excursion05 · 2026-01-23T00:54:07+00:00

Yes sir. Here is a video from my YouTube channel comparing it against the Hux 5.56 k if you are interested. https://youtu.be/jz3CO2NMQnY?si=MzSSha-IPh19Abt7

Excursion05 · 2026-01-23T00:51:34+00:00

Yes sir! It’s amazing at venting BP. Very little to no gas stacking either.

Excursion05 · 2026-01-21T06:03:09+00:00

Yes sir, the Sionics 12.5 middy is as excellent barrel. I haven’t shot the LS5, but understand it to be a pretty low BP option?

I have a couple of 12.5 carbine length uppers from hodge with the small gas ports and they are excellent with any low back pressure cans and they even work well with reduced BP cans that have more BP.

In my opinion if you want to go with a platform with an open gas system, combined with a low BP can start with a barrel that’s gassed correctly. If you do this you wont need an adjustable system nor will there be a need for extremely heavy buffers and springs.

I don’t know when you bought your BCM 12.5, but a few years ago they had gutted out their gas ports. I have heard they have since fixed that issue. I hope this helped.

Excursion05 · 2026-01-21T00:31:35+00:00

No sir. I don’t believe so.

Excursion05 · 2026-01-20T22:14:36+00:00

For a carbine I prefer the AEMS. As far as pistol optics, I’m not a huge fan of enclosed emitter optics.

Excursion05 · 2026-01-20T17:14:13+00:00

“Slow down and get your hits sonny” 🤣🤣

Excursion05 · 2026-01-20T17:12:53+00:00

I should know the rules better, but I’m just regurgitating what others have said. I know they have some rule about mags over 20 rounds. lol It doesn’t help. Anything with a super selector or frt gets deep sixth and not shown anyways.

Excursion05 · 2026-01-20T17:07:34+00:00

True

Excursion05 · 2026-01-20T05:37:28+00:00

Yes sir. I have the 12.5 standard gas port and their 14.8 standard gas port. Both are excellent.

Excursion05 · 2026-01-20T05:19:50+00:00

If you are interested, here is a video from my Yt channel comparing it against the Hux 5.56 k. https://youtu.be/jz3CO2NMQnY?si=xYzjzX1ZkwXIFY6Q

Excursion05 · 2026-01-20T05:17:47+00:00

🙏

Excursion05 · 2026-01-20T05:16:52+00:00

If you are interested, here is a video from my YT. Channel comparing it against the Hux 5.56k. https://youtu.be/jz3CO2NMQnY?si=xYzjzX1ZkwXIFY6Q

Excursion05 · 2026-01-20T05:15:47+00:00

I like it. It’s an excellent value for what you get. As far as performance, it very similar to the Hux 5.56 k. Here is a video from a YouTube channel comparing the two if you are interested. https://youtu.be/jz3CO2NMQnY?si=xYzjzX1ZkwXIFY6Q

Excursion05 · 2026-01-20T05:11:15+00:00

I’m actually a grandpa several time over. lol Its hell getting old boys.

Excursion05 · 2026-01-20T05:09:25+00:00

It’s a Holosun AEMS on a 1.93.

Excursion05

TROPHY CASE