I recently acquired an Aero Survival Rifle with 9mm and 357SIG barrels. The PO warned me that the 357SIG converision had never run right and he would help me resolve it with the dealer if I desired. Since he is the original owner who ordered and purchased the gun and conversion I assume they will make it right if we send it in his name. However I thought I'd take a crack at it first, or more accurately, get you guys to take a crack at it first.
So what's happening is it's FTFing, nosing into the side of the barrel to the left of the feedramp. It is sensitive to magazine spring tension. It will typically fire the last 5 rounds or so malfunction free, but 10 or more rounds in the mag guarantees one or more (usually more) FTFs. I'm using stock G22 .40S&W mags, that have always worked for 357SIG for me in the past, and I used 2 different ones with precisely the same behavior. The rounds miss the feedramp by so much I can't imagine that the .40 mags are the problem but I'm not ruling it out. The conversion consists of the barrel and a .40/10mm bolt face, so if it's not the mags it's likely to be one of those things. I'm betting it's a mag or bolt face issue.
Anyway here's some pics and a short vid: Any expert advice before putting a stamp on it and shipping it in?
Twice it did this:
But many times it did this:
FTF in Action!:
So what's happening is it's FTFing, nosing into the side of the barrel to the left of the feedramp. It is sensitive to magazine spring tension. It will typically fire the last 5 rounds or so malfunction free, but 10 or more rounds in the mag guarantees one or more (usually more) FTFs. I'm using stock G22 .40S&W mags, that have always worked for 357SIG for me in the past, and I used 2 different ones with precisely the same behavior. The rounds miss the feedramp by so much I can't imagine that the .40 mags are the problem but I'm not ruling it out. The conversion consists of the barrel and a .40/10mm bolt face, so if it's not the mags it's likely to be one of those things. I'm betting it's a mag or bolt face issue.
Anyway here's some pics and a short vid: Any expert advice before putting a stamp on it and shipping it in?
Twice it did this:
But many times it did this:
FTF in Action!:
Last edited: