Has anyone had experience in building up a 5.7 rifle on a bolt action? I think a CZ would make a good platform for it maybe using 22 Hornet mags. It is only 0.27 shorter so might run OK. If so who did your work for you and was it a SS or a repeater? I keep picking up the brass and have shot some of the full auto 5.7's and thought it might make a fun little close up varmint round.

Just a potential prospect.

Greg

The closest thing so fare is TC's. You can order custom barrels made for your Contender. Other then that I don't know of much. There is one person working on a M1carbine based conversion and another a Henry style survival rifle. That's about it.

I figure I'll just have to cruise the pawn shops and want adds and find a 700 or go buy a new CZ. It should be pretty straight forward. The 700 might have to be a single shot though.

I am in the working (raising money) stage of doing a M1 carbine in 5.7 Johnson. It would be a 5.7 on steroids!!

Greg

I know the gunsmith who was working on the M1Carbine conversion but he has taken ill and is not able to work.

I kinda like the idea of a Henry with HP ammunition - that would be an ideal survival weapon.

my local builder / buddy & mentor & I built our own 5.7 X 28 Contender barrels with a 5.7 reamer I bought, & his parts... mine is a 10" barrel, his is 21" Mine used a piece of 1 in 8 twist 223 barrel ( left over from making a fast twist Contender carbine barrel ), his was I believe a cut & rechambered 22-250 barrel fit into his reciever block... IMO, the Contender is the easiest way... as it had us both shooting in a little over a month...

he had talked about wanting to build a bolt action, but it would have been a single shot, so I didn't see much purpose over the Contender... BTW... reloading the cartridge out of a fixed breach gun is leaps & bounds easier than reloading from the FN...

... there is also someone building AR uppers that use the FN Carbine magazines... I know a couple guys that have them, & are planning on taking them prairie dogging this summer

There are 2 makres of the AR57 upper. PW arms whose upper is "ok" and a new player on the market. ATI their upper is light years better then the PW design.

How so?

I can't give to many details. Let's just say we are like the first one involved. Makers need ammo right? The one made by ATI is fare better and uses a traditional AR cocking handle, Is much stronger, tighter chamber, and less moving parts.

Are there any guesses as to when the ATI upper will be avaliable?

Very soon. We are waiting on a sample to test extensively with our ammunition. Basically they want to see if we can break it. I can tell you it's one heck of a nice SIMPLE design.

so if you could tell me, which design is the ar57.com's?

If you are referring to 57center.com, it does not appear to use a regular charging handle, so I am assuming that it is the original design. I have only seen the one design, so I really can't add too much here.

I looked for ar57.com and got some alumni website or something, so I believe you meant 57center.com.

I just found this

http://www.midwayusa.com/viewproduct/?productnumber=110810

Wonder what kinda of velocities one could get from this

Neat idea but with a barrel that long I would just go with .223 or 223WSSM.

The 5.7 case cannot hold enough powder to make good use of the barrel. It would be hell on varmints and crazy accurate.

This post has been edited by panzermk2: January 13th 2010 5:16 AM

I have an AR 57 and I like it. A fello ISPC shooter has one also, he had to send it back twice to get it right but it acutally outshoots mine now. I havent had any probs with it as far as neck stretch and ejector issues. His serial # is in the 1200 range and mine is in the 1600's. I think that may something to do with the QC problems, someone wasnt doing their job. I would really like to biuld one on a AR chassis using an AR type mag instead of the PS90. Thats the one thing I could do without. I like catching brass, but I would trade up to a designated AR unit in a heartbeat. I really hate no top rail, and the side rails suck for mounting anything unless you keep the fastners down, just a pain.

What would the benifit be to have a mag system like the standard AR's You will be limited to capacity due to length.

And I would be ok with that. I would rather have a smaller magazine cap then to deal with the PS90 mag thats constantly in the way. I like the rd, in fact I like the upper, but they could have done things a little different for those of us who want more of a contemperary design.

Im in love with the magazine. The 50 round PS90 mag design is proven and holds a shat load of ammo. Main reason for the AR57's popularity.

I really dont want to live with lower capacity. To each there own.

I would however like to see more of a rail section in the rear and some type of bracket on the forward end to make mag changes better and fast like the sight bracket on the PS90 does.

Well really, thats my biggest gripe with it I guess is the mag and the sight rail. I like the 50 rds believe me, but sooner or later, usually sooner it runs dry and time for a mag change. I dont know about yours, but mine is slow to change, negotiating around the optic and getting it out is irritating. I could run through and change two 30 rd mags out the bottom for every one 50 rd mag on the top. Thats where I'm coming from. And the mag itself is somewhat annoying to load as well, the first and second rd just blow lol. Thats really my reasoning for a more conventional configuration. I like the rifle though, and I really like the rd, but would like a conventional version just for me.