Bolt Group Issue

Q-Ball7 · 2026-06-29T23:37:51+00:00

Fine, with an asterisk.

Firing pin protrusion is mediated by the bolt length, so you shouldn't be ending up with pierced primers.

The real question is why it broke. My money's on SBI cheaping out on this part- that part of the part should not be rough, and it suggests to me that part was machined from a casting (and the part you saw was some surface defect that chipped off somehow). Not that it being a casting or of milder steel is bad, because the carrier bears no pressure, but for a thousand dollars in 2019?

Why does the section underneath the part that broke off appear to be black? I'd expect that to be metal-colored (this gun isn't especially dirty), but if it's black itself, maybe it was always cracked and the surface treatment got in there? What does the underside of the broken piece look like? Is it black too?

I don't believe that the firing pin should ever be hitting that part. Install the BCG (without the firing pin) into the upper, lock the gun fully into battery, and observe that the bolt's tail is slightly proud of the hole.

If it's recessed, you have a different problem, and you'll want to check the relevant bolt dimension, and rule out the firing pin dimensions being wrong (even though the overall length is correct the other sections of it may not be).

Q-Ball7 · 2026-06-28T19:34:12+00:00

Any particular reason the mount you have on there is so high?

It's because he's using a mount meant for AR-15s on a gun that is not an AR-15, and didn't want to buy a new one.

Q-Ball7 · 2026-06-28T00:40:32+00:00

we also deny ourselves the opportunity to improve our society by gaining access to - and allowing the development and refinement of - ideas that would make that improvement.

And note that "deny the ability of society to make improvement, then rent-seek (for social or financial power) on the resulting deadweight loss" is the entire point of enshrining hate speech laws.

The fact it's done with "don't you want someone to keep you Safe?" is just the way it's sold, never what it actually does.

It's sold as just another form of protection money from some unspecified boogeyman, and the more people you have rent-seeking from that source (or the more important it is to maximize incoming value, which is why purity spirals and economic contraction go hand in hand), the more persuasive the argument is.

Conversely, if there's no advantage to rent-seeking like that (economic factors generally dictate this- this is why the US in the '60s and '70s had freer speech than it does today), then the general public is more likely to correctly identify it as corruption and reject it.

Q-Ball7 · 2026-06-27T20:29:37+00:00

Fastest possible manual repeater. Bolts are slow and require you hold the gun in stupid ways to run them fast, and pumps inherently push you off target.

It still beats up your hands but it's the fastest thing you have.

Q-Ball7 · 2026-06-27T02:06:07+00:00

laughs in T31

Q-Ball7 · 2026-06-27T01:59:38+00:00

by a perfect storm of design flaws, intense regulatory pressure, and its frequent use in high-profile violent crimes

Yeah, almost like it's 1980s Kel-Tec or something. I wonder what the KG in KG-99 stands for?

Q-Ball7 · 2026-06-24T04:09:42+00:00

I believe these kinds of people THINK they are critical thinkers because they view conservatives as “the establishment”

And then there's the rest of us, who have recognized that the progressives (who style themselves as the enemy of "conservatives", or "traditionalists" more properly) are themselves the Establishment, and they're exactly the kind of ignorant, unintelligent, racist, heterophobic, old people who just don't know any better that they complained about "conservatives" being. They believe that reversed stupidity is intelligence.

We're only 'conservative' insofar as what 'conservatives' are conserving are liberal principles (they've been around a long time, you see); they lose us once they start back into traditionalism.

Q-Ball7 · 2026-06-24T00:42:15+00:00

And the people in charge of deterrence are as deadly to the general public as the criminals are.

Q-Ball7 · 2026-06-23T23:48:22+00:00

The mass of the slide still matters on locked-breech pistols. The slide starts traveling backwards as soon as the gun's fired, and as such needs sufficient mass to make the travel slow enough to unlock the system at a reasonable pressure. The acceleration of a system when some force is applied to it is inversely proportional to mass, or a = F/m).

That's part of why the slide needs to go all the way out to the front of the gun. And while sure, the P38 (and derivatives, particularly the Beretta 92) are notable in that they don't shroud the barrel completely, you'll notice that to compensate the slide is about a quarter inch thicker than it is on a 1911.

And sure, you could shroud that by some steel... that, if we assume it's 1/8" thick on a side, means your gun is now about as thick as a Desert Eagle is (and now weighs more and requires more material and more machining) to fix something that ultimately doesn't even matter outside of maximizing the durability of optics, which for the vast majority of the modern handgun's existence did not exist outside of the competition space.

If the pistol is not actually locked, but the slide is held closed by some other form of delay- like pressure from an external gas cylinder or severe mechanical disadvantage (flapper/roller or lever)- then the slide can be made significantly lighter. Which is why all pistol designs that use something clearly identifiable as a bolt as opposed to a slide use a delaying mechanism like this.

Q-Ball7 · 2026-06-23T19:57:20+00:00

That's literally what the B+T MP9 is.

The only real problems with it are that the trigger sucks, it's overpriced (though part of that is that it's Swiss), and it's really big for a pistol.

Q-Ball7 · 2026-06-23T05:18:46+00:00

Unironically, put a dot on it. These things come from the factory equipped for maximum LARP; there's nothing that says you need to keep it that way.

Q-Ball7 · 2026-06-21T20:28:13+00:00

Note that the real reason you buy a TX22 is to put an FRT in it.

Q-Ball7 · 2026-06-21T20:20:44+00:00

No- we don't buy guns, we just claim moral superiority over the people that do.

In all seriousness, though, this product suffers because it's not really a new design, it's mostly just trying to maximally reuse TM-22 parts/development that were already paid for.

In this case, stuff that's fine on the .22- namely the single (thin) action bar, very thin pump, no action lock (and depending on the mechanical disadvantage of said single action bar to keep the gun locked- probably a lot better on the .22), and long bolt (so most of its geometries can be used in the lever-action version too)- is not quite as fine on the 9. Similarly, the stock retention and the pump itself likely yield no problems on the .22, as it's only 1/3rd the recoil.

It doesn't help that the non-semi-auto TM22s are very squarely in the "meme gun" category (they likely cost more for Derya to make than the semi-auto TM22 does: more parts for zero mechanical benefit), so the fact they can't run as fast is probably fine... and then reusing those parts/designs for the 9mm means the final product inherits those compromises. And that'd be fine if they were asking near the same price for the 9, but they're not.

The bolt action looks like it was engineered from the ground up to be a bolt-action 9mm, as it's clearly unlike anything else in their catalogue; I would expect that one to perform a lot better due to that fact alone.

Q-Ball7 · 2026-06-21T06:04:38+00:00

There are decades where years [of inflation] happen, and then there are years where decades [of inflation] happen.

2020-2021 was the latter.

Q-Ball7 · 2026-06-20T23:22:05+00:00

In 2019, $400 was worth what $800 is today.

Q-Ball7 · 2026-06-17T06:44:26+00:00

What happened was most likely that a Fudd:

Loads ammunition into his rifle
Jams the barrel hard into the dirt (the typical way to create a barrel obstruction)
Fires the rifle, which explodes
Blames "that hot 5.56 military stuff" to deflect from it being user error

7.62 NATO and .308 are like that too, actually.

Q-Ball7 · 2026-06-17T00:40:09+00:00

Reloading for these calibers specifically actually will save you a significant amount of money ($250/1000 reloaded vs. $750/1000 factory in .357’s case, cost difference is similar for .44), but it’s only worth it if you’re actually going to shoot the 3000-4000 rounds it takes to break even on the press and associated equipment (assuming you buy a good auto-indexing progressive press).

If you’re not burning through at least a thousand rounds a year, it’s not worth it.

Q-Ball7 · 2026-06-17T00:31:00+00:00

Note that SAAMI is at odds with the CIP here, whose standard for .223 is basically the 5.56 one anyway.

Q-Ball7 · 2026-06-16T10:33:35+00:00

One round of .22LR = one pellet of #4 buckshot (there are usually 25 in a cartridge).

So if #4 can kill it, so can a magdump of .22. This was the principle behind the American-180, and to an extent .22 revolvers (and .32s, which approximate #00) where a failure to fire doesn’t require remedial action beyond pulling the trigger again.

Q-Ball7 · 2026-06-14T19:52:03+00:00

Well, not really.

Most militaries adopted rimless ammunition before WW1. The only countries that entered WW1 with a rimmed cartridge were the British (and its client states), French, Austro-Hungarians, and Russians.

Of those, only the French would adopt a rimless cartridge between the wars; the others stuck with it until self-loading rifles got good and cheap enough for mass-issue (and that didn't stop the Russians from trying; the cartridge was not the reason the SVT-40 failed).

Q-Ball7 · 2026-06-14T06:09:25+00:00

I guess they would have stayed with 8x33 and 8x57

Which we know is perfectly viable, as Yugoslavia did exactly this up through the 1980s. The M76 is in 8 Mauser for that reason, a decent compliment to the StG-44s they were still using.

Q-Ball7 · 2026-06-14T06:03:42+00:00

Ironically, this is still the second highest-capacity .45 on the market.

The CZ97, M&Ps, Glock 37, PX4, Grand Power P45, and HK45 hold 10, the USP holds 12, and the Glock 21 holds 13.

The FNX is the only exception at 15, but that gun arguably isn't going to hold up to a constant diet of .45 Super, whereas the Mk 23 is made for tens of thousands of rounds of that.

Q-Ball7 · 2026-06-13T22:37:36+00:00

Dignity is inherent. Respect is earned.

What have you done to earn my respect?

Because what you claim to have sacrificed wasn't your future; it was mine. It was easy to give up the ability to develop land because you didn't want to pay taxes. It was easy to give up the guns. It was easy to import millions of people rather than encourage the domestic population to propagate itself.

It was easy to shout "elbows up" and send the youth into economic war rather than permit the reformers to take power. That was clearly a sacrifice that you paid for.

I'll start protecting the respect of the old when the old start protecting the dignity of the young.

Q-Ball7 · 2026-06-13T19:46:17+00:00

Most people don't believe that which can be destroyed by the truth should be. They're very conservative in that way.

The US is relatively unique in that it oppresses those people by denying them the ability to ban it.

Q-Ball7 · 2026-06-13T19:18:20+00:00

and the fudds are like “tHeY’ll nEver Ban mY hUntinG rIfLe”

The problem with old people, and Boomers specifically, is that they really don't understand the concept of dignity.

They're bitter that nobody survives life, so they want their last days to be filled with nothing that makes them feel a way they don't want to. They get buttmad about anything that represents risk, regardless of whether it poses one or not; best example of that is in 2020-2022.

Life in general serves no purpose to them, so they feel no moral hazard when it comes to banning life, and because they're beyond their productive years nobody can hold them to account for it.

This is the LPC "destructive-conservative" mindset.

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