Can I get away with a carbine position port and cycle?

[rumlover]

Hey fellas,

I want a whisper upper but don't want the expense of a custom rig leaving the Model1 or Olympic Arms options (if there are others, I'm not aware of them). The twist is right for the heavy subsonics, but they only offer the port in the carbine position. I'm not interested in high velocity ammo, just subsonics for grins and giggles.

Will the carbine position uppers cycle with subsonics?

[nwcid]

My custom barrel from Lilja has the gas port in the Carbine position. I have not got a lot of rounds thought it but 240gr SMK in a SS load using 1680 cycles and locks mine open.

[Colohunter]

With AA1680 I also have loads that cycle, the 220gr subsonic cycles and locks back. The 150gr subsonic cycles, but does not lock back on last round.

[Pitt300]

I have M1S in carbine position.
Runs great w/subs & supers but will not hold open on last sub round (will hold open w/supers).
Paul @ M1S sells a 300-221 spring & buffer kit that will let it stay open on last sub round but he told me to NOT shoot any supers thru it.
I occassionally shoot supers so I've opted to not worry about last round.
Otherwise runs great w/subs & can shoot 1/2" groups.

[mooster1223]

I spoke to Paul at M1S when I ordered mine and had it ported in the pistol position. I also had it threaded 5/8 24 to work with my other 30 cal goodies . If you call them, ask to speak to Paul. Great guy to talk to.

Jim

[rumlover]

That's exactly what I was looking for. Thanks Fellas!

I've got an encore from virgin valley with an AAC quick mount on it for the 762SD. It's quiet, but I'm getting tired of my encore fettish (bought 4 last year) and think I want the whisper in an AR platform.

I'll give M1S a call Monday after I've finished my taxes.