380 upper for m11/9?

[Jmacken37]

strobro32 is so smart (and wildly handsome!).

 

[HighriseATX]

I think the same could be said for Jmacken37

 

[Gaujo]

I don't know of the OP reloads or not, but it's fairly easy to download 9mm to 380 performance. I competed in a few subgun matches back in the day, but I did exactly that to "tame" the stock M11/9's ROF for a competitive advantage.

You're once again in strobro territory. Check his profile pic.

 

[strobro32]

I think the same could be said for Jmacken37

And Jake is nicer and sexier than me.

 

[Slowmo]

Got it. I honestly think you'll have a difficult time getting a higher ROF with 380 over any 9mm configuration in the M11/9. You're throwing a weaker ctg into a platform with a heavier bolt and longer bolt throw. If you want "crazy ROFs" in your M11/9 to play with, stick with 9mm and throw a Mack Jack in the back of the receiver. I think you'd also save money over adding a new caliber and new hardware.

You could always pick up an M11-380 . IIRC, my M11-380 in stock trim runs 1500rpm without suppressor and 1800rpm with suppressor.

So this might be a dumb idea, but since an M11/9 is more or less just an M11 receiver that has been lengthened in the back, could you just stick a wood/nylon/delrin/whatever block spacer in the rear to bring the inner cavity to roughly M11 dimensions and use a complete M11 bolt assembly (including M11 spring, recoil spring rod, and ejector) with a .380 barrel?

 

[Deerhurst]

The Mac jack is basically a spacer the takes up room behind the bolt to shorten the distance it travels. I think all it is is a delrin block.

 

[Gaujo]

So this might be a dumb idea, but since an M11/9 is more or less just an M11 receiver that has been lengthened in the back, could you just stick a wood/nylon/delrin/whatever block spacer in the rear to bring the inner cavity to roughly M11 dimensions and use a complete M11 bolt assembly (including M11 spring, recoil spring rod, and ejector) with a .380 barrel?

Methinks just let it run. It won't bottom out. If it's too slow, you can make it bottom out with spacers/ Mac jack etc.

The CFW bolt is just an M11 bolt with the recoil rod of an m11/9 and a longer spring. Basically run the same setup but a steel bolt instead of tungsten.

 

[Hey]

The CFW bolt is just an M11 bolt with the recoil rod of an m11/9 and a longer spring. Basically run the same setup but a steel bolt instead of tungsten.

if you want 380 to run slow in an 11/9 you need to run the full size 11/9 stock bolt.

 

[hkg3k]

looking to convert to 380 for a high ROF for this for to be a range toy, not for any comp use.

I think the OP is looking for a high ROF range toy to play with and thought going with a 380 setup in his M11/9 was the best way to get there.

IMO, he'd be ahead by using his M11/9 in 9mm stock trim with a Mac Jack, suppressor and heavy bullets (since he reloads).

 

[10mmlover]

Sorry for the face replacement. practical solutions 380 upper on an m11/9. Observable lower rate of fire, same shockwave mags as I use for the 9mm. Out of about 6-700 rounds, I've had a couple hangups because the 380 is a shorter cartridge in a 9mm magazine space. I recently put some of the Lage spacers they offer for the m11/9 and now the rate of fire is the same as the original m11/9, but the recoil is significantly reduced. I think I'll generally shoot 9mm, but it's a nice upper to have if a buddy is shooting a machine gun for the first time. The reduced recoil and low rate of fire is sometimes welcome.

 

[Kkontx]

Sorry for the face replacement. practical solutions 380 upper on an m11/9. Observable lower rate of fire, same shockwave mags as I use for the 9mm. Out of about 6-700 rounds, I've had a couple hangups because the 380 is a shorter cartridge in a 9mm magazine space. I recently put some of the Lage spacers they offer for the m11/9 and now the rate of fire is the same as the original m11/9, but the recoil is significantly reduced. I think I'll generally shoot 9mm, but it's a nice upper to have if a buddy is shooting a machine gun for the first time. The reduced recoil and low rate of fire is sometimes welcome.

Kind of wanted the 380 upper just to have another caliber available as well as the higher ROF. May just go with a practical solutions upper in 9mm and throw some spacers in it to scratch the ROF itch.

 

[MitchWerbellsGhost87]

I’m sure this has been mentioned, but you can just install a 380 M11 barrel in an M11/9 upper receiver, they have the same trunnion. The factory standard M11/9 bolt can be used, and the gun will fire .380 at a way slower rate than 9mm. You are effectively turning the M11/9 back into the gun that spawned its design in the first place, the M11 .380 “proto-slo” slow fire SMG. They took an M11 .380 and added 2 inches to the rear of the gun to reduce the cyclic rate. It never took off, and the original prototype was scrapped, but they ended up slapping an M10/9 magwell on it and chambering the same 2” longer design in 9mm and the rest is history… but SWD always offered their .380 “slo-rate” conversion kit, which consisted of a leftover RPB cast M11 .380 bolt, with a 1” chunk of steel welded to the rear end, and an M11 .380 barrel. I still think SWD was only selling those 380 “slo-fire” bolts as a means to get rid of their surplus of leftover RPB 380 bolt castings.

 

[sparky923]

I’m sure this has been mentioned, but you can just install a 380 M11 barrel in an M11/9 upper receiver, they have the same trunnion. The factory standard M11/9 bolt can be used, and the gun will fire .380 at a way slower rate than 9mm. You are effectively turning the M11/9 back into the gun that spawned its design in the first place, the M11 .380 “proto-slo” slow fire SMG. They took an M11 .380 and added 2 inches to the rear of the gun to reduce the cyclic rate. It never took off, and the original prototype was scrapped, but they ended up slapping an M10/9 magwell on it and chambering the same 2” longer design in 9mm and the rest is history… but SWD always offered their .380 “slo-rate” conversion kit, which consisted of a leftover RPB cast M11 .380 bolt, with a 1” chunk of steel welded to the rear end, and an M11 .380 barrel. I still think SWD was only selling those 380 “slo-fire” bolts as a means to get rid of their surplus of leftover RPB 380 bolt castings.

Can confirm.

 

[bruh44]

This was with the stock bolt and just a barrel swap?

Yes