I just put mine all together. Feeds fine with the PSA hybrid bolt by hand. I'm going to run it tomorrow, but don't forsee the need for the bolt machining.
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Stern Defense MAG AD pistol mag adapter for AR
- Thread starter DanKATL
- Start date
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Maybe it's already been milled?
https://getstern.com/pages/mag-ad9compatibility
"Recent development, the MAG-AD9 system is not compatible with PSA Hybrid or Foxtrot Mike bolts. This is due to the lug which strips a round off of the magazine being .035 of an inch further from center-line as compared to other bolt systems."
I don't think so. The trader I got it from bought it new, and was running Colt mags. He knew about the Stern adapter and we even talked about them milling the bolt.
I wonder if I just got lucky and all the tolerances of all the components stacked up the right way. I've tried it with Smith mags from 2 different pistols and some I bought new, all seem to work. I'm assuming that as long as the lug runs between the feed lips and chambers a round I'm good, and that if the bolt needed milled it would hit the back of the mag. But maybe there's some other potential issue I haven't thought of.
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Well, it runs just fine, so I guess I won't be sending my bolt off.
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Nice. What was your caliber decision?
I'm running a 10.5 psa barrel with a linear comp. It's a pleasure to shoot. Easy on the ears, recoil like a 22. I have a 4.5" barrel that came on the upper I'm going to hang onto and eventually put on another upper, but no pistol can yet so no sense of urgency.
I was kind of feeling a Colt SMG vibe. I'd like to find an A1 upper eventually and get a colt style deflector/port door for it. Just not feeling like dropping another $200 bucks into this one at the moment.
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Nice. What was your caliber decision?
I'm running a 10.5 psa barrel with a linear comp. It's a pleasure to shoot. Easy on the ears, recoil like a 22. I have a 4.5" barrel that came on the upper I'm going to hang onto and eventually put on another upper, but no pistol can yet so no sense of urgency.
I was kind of feeling a Colt SMG vibe. I'd like to find an A1 upper eventually and get a colt style deflector/port door for it. Just not feeling like dropping another $200 bucks into this one at the moment.
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I settled on 9mm, haven't ruled out 357 Sig or 40 if I can find a bolt with decent reviews. Aero stripped upper without FA, 13" Matrix Arms M-Lok Foxtrot rail, and KVP 16" barrel, bolt and linear comp. I had a rear Ruger flip up sight, so I picked up a matching front to round it out. Should make a nice range plinker.
Man, that seems really expensive for a mag adapter considering the glock/colt is half that. HOWEVER, it would be cheaper/worth if you already had m&p mags.
12 rounder out of a 9c right? They fit. They're almost flush with the adapter.T-Roy have you tried a compact mag yet? I want one for bench rest to sight it in and found them for $8 each.
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