Yes is rifled. Outer barrel is a steel barrel from the M4 GBB Rifle. Iner barrel is 10 mm in diameter Lothar Walter 22 LR Match barrel.
Sorry. my English is not so good ....
10/22 Bolt is not only available in Europe.
For my bolt carrier from the aluminum and the inner head is made of steel.
137 gram weight bolt for cci subsonic.
Ringing in ball-bearing rail.
I live in Switzerland and Germany.
The first prototypes had Boltcarrier Plastic and aluminum bolt head with selfmade extractor. The carrier ran directly in the upper receiver.
So I had ejection problems.
The second Prototype had 10/22 Extractor, aluminum and steel carriers Bolthead. That was better.
The third Prototype has gotten the ball-bearing rail and a loaded cabinet scaly better ejector.
Then it runs perfectly.
In full auto it makes about 1,200 rounds / min. because there is no auto sear is installed.
The hammer is then directly connected to the bolt forward.
View attachment 1011
I would not take a 10/22 Bolt is a change in ACR 223 22lr,
I would take a conversion kit or cmmg of Ciener.
It's sure easier.
The dimensions of AR15 barrel end to the hammer should be the same as for the ACR.
Magazine top edge to the middle barrel must also be used.
So the CMMG Bolt in an aluminum housing and provided with slots for the original acr appeared in upper and ready. (And make less weight, less than 150 grams)
If enough fans an ACR PTS Airsoft version will convert into 22lr I can when I have time to make an accurate drawing and offer them for small money.
Sorry, I mark the question correctly. My English is not so good.
I can not use a 10/22 parts. These are available here in Europe, not to buy.
I use as Walther Colt 22 lr mags that fit into the PTS Masada and are easy to load.
I have no Bushmaster ACR. It is not yet in Europe.
Send parts to the U.S. is expensive (costs more) than the final product with you to make.
I understood that, but we have a user here, APWR. His fabrication shop builds and tests different theoretical builds, parts, and add-ons to the ACR (and I imagine other weapons). The request was directed at him. Nice build.
Bushmaster has a shop in Europe, so there is no ACR in Europe.
Impotieren one could theoretically the ACR.
I've previously imported AR15 parts, book now there DMPS also in Germany and we also have our own Food Producer for AR15 rifles and parts.