What is this piece I found wedged beside the hammer in a Mossberg Plinkster?

So i bought a winchester 1300 pump shotgun at a pawn shop and i have found that if I shot it without supporting the foregrip it will unlock slide back and eject the round by itself. Is this normal/safe? Seems like it shouldn't be able to unlock like that. Is there a way to fix it that anyone knows of?

Came in from a group that does funerals for veterans. It isn't my area of expertise. Clean, lubed, greased, and won't extract. I do notice the bolt, receiver, and op rod have mismatched numbers. Not sure if that's normal for these.

Other than that, cool gun that you don't see everyday.

Went Pheasant hunting with my grandad’s 1947 Model 11 and something happened - looks like the firing pin retaining pin backed out and snapped off maybe?

Is this fixable or should I hang it up? Planning on keeping it for sentimental value, but I like shooting it and I’d like to fix it if it’s fixable. Would it be more trouble than it’s worth? TIA!

Thinking about picking up an old wingmaster to turn into a suppressed SBS. After filling out the paperwork, Chopping the barrel off, cutting choke threads and installing the new bead, it shouldn't be too much of an issue. However, I'm not too happy with the look of black anodized aluminum on top of blued steel.

I'm curious to see if anyone has been able to certain coatings or paints on aluminum and titanium to get a similar blued look. After working with kg coatings before, I know not to expect perfect results with color matching; but just something in the ballpark. Thanks guys :)

I picked up a s&w 3913. Slide has some pitting I'd like the pitting cleaned up and forward serrations cut.

I had previously posted about having grouping issues at 25 yards. Well after getting my hands on a stock 1022 barrel, I have solved the problem. The barrel was bad. I do not know exactly what is wrong with the barrel, but it is going back for warranty just thought I’d give an update since I got a lot of responses.

Recently acquired a Remington model 58 Sportsman 20 gauge.
Gun is clean and was well maintained but I’ve got plenty of shotguns.
Looking to cut this one down to a SBS since it was cheap and I’m not attached to it. Hoping to replicate a copy cat “whippet” shot gun.
Any input is appreciated.
I’ve cut down a few before but only bolt and pump

The hammer released while removing the trigger assembly and now the trigger group won't come out . What's the best way to fix this issue .

Hello

I really love A&T pepperbox revolver, but rather than just buying it I'd prefer to make my own. Well, make a 3D print of it to see if it's worth the hassle first :P Problem is I can't find blueprints for it, and all my know how comes mostly from YT videos like this (link).

Does anyone have or know where I can find the blueprint for that oldie gun?

I want to replace my rear sight on my stiga rifle for an adjustable one from Marble Arm #69w, but I don't know if I should buy the normal or high version.

I talked with a guy from customer support, he said that "the sights are measured from the bottom of the base to the bottom of the notch" and according to the measurements I gave him, I should get the high one. I asked him if the dovetail part was part of the base and he just responded the same thing.

The part that confuses me is that when you follow the instructions to find the heights, it doesn't mention adding or subtracting the dovetail. It just says to take the barrel radius + the sight height which wouldn't take into account the dovetail height. The rear sight on my rifle is dovetailed directly in the barrel, maybe it's not the standard or modern way?

My rear sight, from the top of barrel to the bottom of the notch (so the dovetail is not included) is 0.377", which would be in the range of the normal height sight but the guy said that I need to add the dovetail height so 0.377" + 0.090"= 0.467" which is now in the range of the high sight.

Please help, I'm so confused right now..

Edit: under the image of the sight, in the bottom right corner, it says: measured from the bottom of the dovetail to the bottom of the notch, but it wouldn't work with the instructions to measure the height.. Unless this method is only for sporting sight (long leaf springs-like sight) and for basic sight you count the dovetail?

I’ve been trying to monkey with this auto ordinance 1927 A1 Thompson and disassemble it, but the lower is not separating from the upper I push in the button pull back the lower from the upper and it only separates it about half an inch. Somebody please help me with this problem. I’m totally lost. And yes I’ve followed all the directions

I recently built a 10/22 and am having issues with it holding any type of group at all. I have checked the scope and scope mounts they both appear to be fine. I have also checked the V-block and made sure the barrel is properly attached and has no visible damage to the crown. I have also tried different ammo’s and that doesn’t seem to make a massive difference it makes it slightly tighter but not a lot. I’m kind of lost at where to go from here and am looking for any helpful advice.

The build list is
a factory receiver
a volquartsen trigger spring kit
A Faxon Rimfire 10/22 Straight Fluted Chameleon Pvd Threaded Barrel 22 Lr 16″
A vortex 2-7x scope I can’t remember the exact model right now
A butler creek heavy barrel stock
A Amazon bipod
All this was shot from bench shooting and I had other people shoot it to make sure it wasn’t me and they were getting the same results

I’ve also tried multiple different types of ammo such as federal, Winchester, augila, cci, Norma, and eley and there has been no major difference between them besides cci and eley slightly tightening the group up but not enough to be close to a half decent grouping

This is very early in the design process.

like last hour worth of concept

Idea use a globe sight modified, to be able to sighted in tube in camera will work as the magnifier. I'm just worried it might not focus properly. The camera would be long eye relief. Because there would be no eye relief. It would be a screen so it could be mounted forward for making longer range shots

I was wondering if somebody could measure the width and depth of an M&P9 magazine for me. I'm posting two photos as examples of the measurements that I need (mag in the photo is not from an S&W M&P9). Apologies if this post doesn't belong here! I figured that the gunsmith subreddit would be full of folks who have access to an M&P mag and a set of calipers.

I put a magnum shell into a marlin .22 long rifle.
Semi auto type with tube load.
Can I get it out without disassembling?

Just bought a cut down Gewehr 98, it’s 25 inches. I want to build a similar rifle to the cut down g98 I shared in the photos here. What would be a good lower stock to put on it? thanks!!!

Is there any reason I couldnt chop and thread my 40 cal Kriss vector Carbine to 5.5 in and I want to do similar to my H&K MP5 22lr but Im pretty sure Id have problems converting to the pistol varient forend and optic.

Looking to see if anyone has made a .303 double rifle and how did it go?

I ask this because I find myself imagining scenarios where we don't have access to electricity, all the work would have to be done manually.

Is it possible to replace the grip safety on a 1911 government with a more classic one? I hate this modern safety, and since it's almost impossible to find a classic 1911 in the country where I live, I wanted to know if it's possible to replace it or if I need to make any modifications