Sig Mosquito jamming fix

Sig Mosquito jamming fix. I did this work to the gun before I ever fired it because of all of the reports I heard about these guns having feeding problems. I noticed that the feed ramp just fed the bullet to a flat verticle spot on the barrel just below the chamber. .22 bullets are pretty soft since they are not jacketed and they like to catch on anything they can. Since I did not fire this gun before filing, sanding, and polishing the feed ramp and removing the verticle spot that led to he chamber, I do not know 100% if this was a cure or not. What I do know is that this gun does not fail to feed. It does however fail to eject the spent cartridge after it gets dirty. About 100 to 200 rounds gets things pretty dirty and the spent shell fits so tightly in the chamber when it gets dirty that it does not always want to come out. Running a brush through the gun every so often helps. Rem Thunderbolts will shoot in this gun but they will fail to eject a lot more often than CCI Minimags or CCI stingers. This gun loves Stingers and rarely fails in any way with those loads. The down side to that is they cost a lot more than Thunderbolts. I mostly use thunderbolts because they are cheap and I dont' mind a jam every clip or so.

I will be taking some video of shooting this gun and showing just what bullets jam and why they jam. Plus it will just be fun to shoot.

I have now shot close to 2000 rounds through this gun. My last time shooting it it shot 100 rounds of CCI Minimag without a single failure. The time before that was a 200 round day. At about round 180 I had a stove pipe due to a weak bullet. No function problem whatsoever with the gun itself.

Category:

Entertainment

Tags:

• Sig
• Sauer
• Mosquito
• .22
• automatic
• handgun
• jam
• jamming
• problem
• fix
• plinking

[mountaintramp1]

if you did the mods before ever firing it, how do you know it had a problem?

[jboritzki]

@mountaintramp1 I don't really, but all of the reviews I seen and read said that it jammed a lot, so I found areas that I thought might be problem areas and filed and polished them. I probably should have tried it before and after.

[jpop8807]

By any chance did its seem like the extractor was having a hard time grabbing the rounds?

[jboritzki]

@jpop8807 Yes! I forgot about that until you said it. It did seem like the gun would get dirty and the empty case would get stuck in the chamber and the extractor would pop off the rim trying to pull it out. I think over time that will correct itself, but I used a dremel tool and polished the inside of the chamber to speed up the break-in process. That helped a lot. Now, after thousands of rounds, it almost never has any problems.

[Sigp229TRT]

@Tigermoon1950 BS I have one and after 800 roiunds of CCI ammo. The ammo SIG says to usxe I have had ONE failure to feed. Clean it oil it and use the ammo they say and all it does is shoot. Just like the other three SIG handguns I own.

[jboritzki]

@stupidplants But I wanted this gun and also wanted a .22lr caliber.

[stupidplants]

@jboritzki

For 300 you could have got your hands on a barely used glock, easy.

[nwpentax]

@jferret75 WD-40 has some unique uses, like removing tar from a cars paint, getting moisture out of a dristributor cap etc, but has NO PLACE on a firearm. Yes, there will always be people who insist it works just fine, but then again, they are the same people that believe duct tape and bailing wire are the answers to all the world's problems.  By the way, never owned any airsoft guns or video games. They weren't around when I was growing up. Just trying to clarify misinformation.

[nwpentax]

@jferret75

WD 40 was designed as a water displacer and it does work fairly well as a penetrating solution on rusted or siezed bolts etc. It is NOT a firearm lubricant, and in fact has no lubrication qualities at all once it dries. In fact, when exposed to heat (like on a firearm) it turns gummy. Once dry, it does not protect or lubricate whatsoever. When WD-40 gums up it will harden up after a period of time. Heat and dirt speed up this process. This can cause many problems with firearms.

[nwpentax]

@jferret75 I don't doubt for a second that you ARE using this method with WD-40. I just do not believe it is the right product to use for the intended purpose. Actually, I own a Mosquito and if you use the correct recoil spring for the type of ammo you are shooting and keep your gun/magazine clean and lubricated, you shouldn't have to do anything else to feed/fire/extract hundreds of rounds in each shooting session with at least 95+% reliability with any ammo you choose.

[jferret75]

@nwpentax I am at 65k rds and its going fine doing this method. For training purposes it has already paid for itself and if it did get destroyed I would just get another. If your going to come on here claiming wd-40 on a firearm is going to blow them up please, please just get the fuck out of here. Airsoft maybe, the real thing? No. I am sorry it doesnt say hoppes or remoil on the can instead...simple fast is that wd40 works great if used the right way.........HOLY FUCKIN SUPRISE!

[nwpentax]

@762infidel How would spraying a flammable water displacement / rust inhibitor help you do anything except maybe blow your hand off? I understand the concept of maybe lubricating your magazines as well as keeping the gun oiled up but I definitely wouldn't use WD-40 on any gun. Not only is that stupid, it will ruin your gun.

[Tigermoon1950]

Sig Mosquito=more jams than Smuckers.