Didn't think I'd see the day, but you can finally add DDLES to the list of optional lowers for a 45auto conversion.

I thought I'd show something of the new 45auto lower.  I already removed the ejector because I'm using a DI45.  But before I removed the ejector, I noticed that it was loose with no factory way to adjust or secure it.  Just something I noticed.  

The ejector is supposed to be loose, so it can self center where it rides in the bolt.

Just right carbines in NY has a .45, .40S&W, and 9mm carbines available. The 45 version was at my LGS today, its cool, it is blowback and uses its own upper that shares very little with an AR.
Uses glock mags, but they have a 1911 mag version.


[youtube]http://youtu.be/m5vff3HRHUk[/youtube]

Hey Nathan. I recieved a couple of these lowers & they are all set up. The only issue I had is the bolt stop. Depending on upper it may contact the carrier. Took a little off the bolt stop & they work perfect now. Just a heads up.

Ron, do the bolts for your DI 45s work on 458Socom also?

Sure do.

Thanks for the re-thread Ron.  Anyone think I should replace the suppressor piston spring with a fixed spacer before I run it?  Section of copper pipe as spacer?  Can't wait.

Cool, thanks brother.  Yeah, I saw your message too late and ended up trimming the actuator...I know, I'm going to order a spare just in case.  But I'll send you those pics of what I did...I should have sent it to you.

hmmm, but the ejector on my 9mm blowback isn't loose like that.  I'm not refuting what you're telling me, just makes me wonder what kind of bolt DDLES had in mind for this setup.  I have some great pics of this complete with Ron's upper using a MUR1A...it's sweet...I'll get them up soon.

I posted this in a review that will eventually get archived, so I thought I’d put this detail of the magazines in the conversion thread.

For the magazines to work with a direct impingement upper on the DDLES Glock Large Frame lower, the follower needs to be trimmed for the bolt to be held open on the last round.   Otherwise between extraction and ejection of the last round, the bolt will get hung up on the top of the follower.  You only need to do this to factory Glock magazines and not the Korean aftermarket ones (far right).


Then you’re good to go…

is that liberty ammo?

yes...civilian version

Sorry I missed this. Yes on a spacer.

Anyone know where I can find a extractor for a 450 Bushmaster bolt???  I've been looking everywhere and can't find anything.  I'm dying to get my 45acp upper together.

Shoot me an email.....I have a few.... [email protected]

Happy 4th of July to me. I built this today and will test it in the morning.

hi everybody,I'm new to the site as I just stumble apon it last night. The info on here is great so I figured you would be the people to ask about a 10mm AR build I want to do. I want to know it this will work or if I am heading down the wrong path.

DPMS lower
A2 buffer set up with Ace skeleton stock...stock buffer and spring
DPMS slickside upper
6.8 spc bcg
14" barrel with pinned FH ( to keep it legal length)
carbine length gas tube with adj gas block
Diamondhead VRS-T 13.5" free float HG


Will this work?

You'll need to ditch the carbine gas tube......gas system is gonna be way shorter than that.....were you going with the adjustable gas block to use it as a suppressor host to turn off the gas?

Also what Magazine do you plan on feeding it with?

And I'd go with a Samson Evolution......it'll accomodate just about ANY length gas system from a standard rifle to a super short custom. It is almost like they designed it for people do ing screwy stuff with custom builds

Or a Vltor CASV.....Any update or pics of my setup you can show?

Sent you an email.......Upper runs flawlessly....but the magwell adaptor is still giving a few fits......I'll see if I can get a pic or two up though... and you are spot on on the CASV that is an awesome handguard......coupled with the HK sights you supplied.....it will get duplicated for a personal gun eventually...of course the list of unstarted personal builds is about as big as I am fat....

...

Looks like a custom machined buffer that the length was done to match a normal buffer but they didn't compensate for the polymer piece.

...

No clue. Still haven't gotten me a 45 upper, even though I'm doing that mag project. Will just have to send any finished mags out to folks for testing and reviews.

...

Me too. I emailed Kickstarter the other day about posted the project on there since they have policy of no gun accessories asking for clarification if the project would fall under that, but haven't gotten a response yet.

I'm still debating on which route I want to go with making the pieces. My biggest three options are: get plastic injection molds done for the parts, buy a 3d printer and print the parts myself, or contract a 3d printer place out and get them printed. I just need to get the files cleaned up to get quotes done from a few places to see which would be more economical for myself and my customers to keep the price down as much as possible. I also have to redraw the floor plate up as the file I had either got corrupted or refuses to load correctly because when I pull it up, nothing shows up.

ETA: And guess what. I didn't write any of my stuff down on the last rendition of the floor plate I made, so I'll basically be starting from scratch.. again..

what magazines are those?

GG mags. I remove the outer skin, squeeze down a little to fit in lower & mod the follower.

And we can add HK USC mags to the mix for use with a standard AR lower/magwell........finally got back to the adaptor I was making and solved the issue with the latch not holding 100%....................... replaced the coil spring with a double torsion spring and all is well......
Lower is a registered SBR and an upper I built for a fellow at FT Hood.

YES!!!! I know I saw the video already, but always good to see it again. I cant wait for it to get here, lots of pics for the hive as well.

Pardon me for asking, but 32 pages is a bit too much to read thuroughly; will the HK adapter work with Olympic uppers?

I will retest it this weekend with my olympic upper....but it should.....

As promised, review and more pics of Mad Machinist's (MM) .45 conversion for USC mags. She arrived in the mail today and I immediately began playing. Weather looks to be shitty this weekend and lousy staff duty on Sunday so I don't know when I will get to then range. Fit and function are outstanding. At first the bolt would not pull back on an inserted empty mag. After letting bolt slam home over the bare follower a few times I think I broke it in. This was the case with all 3 mags I have, all three work fine after same procedure. The bottom lug was catching, I think it wore a small groove or something.

I cycled some rounds through it by hand, no feeding issues. Feed ramps in then upper were ground to one big one like in my RRA .458 SOCOM upper to accommodate the large bore boolits and single stack mags. You can see in then close up of the upper the milled out portion of the ejection port to allow .45 brass to freely eject. This is discussed on several other threads, now you see.

I saw the video, so I know it fires. If you want one like this, MM can make the whole thing or supply your own parts to Macon Armory. I gave him the upper with rail installed, barrel nut, BCG (I think...) and he made the barrel, gas block, gas tube, flash hider, mag adapter, and put it all together. Highly recommended.

Specs:
Standard Upper, I forget then brand
Surplus Ammo & Arms registered SBR lower. SAA's are Aero Precision lowers with SAA roll marks
Vltor CASV-S rail. I used OD Green KG Gunkote on the aluminum portion, very good coating.
Magpul BAD Lever, RVG, K2 grip, Trigger guard, ASAP endplate, and ACS-L Stock
Centurion Arms HK style diopter sights. I had to file a slot in the upper for the rear sight cross screw to fit; about 1 rail slot rear of the rear most factory one due to the CASV top rail and sight base. It was about a 10 min job with square and round files, touched up with alumablack.
Standard BCG other than the bolt, MM took care of modifying or procuring a .450 bushy bolt.  
Barrel was custom made by MM
Gas block is made by MM, it sits directly in front of the barrel nut, under the rail. Custom gas tube as well, probably 2-3 inches long to have enough pressure to cycle.
Flash hider custom made by MM. HK Style 4-prong per my request.
Buffer is standard carbine with all weights removed, very light.
Dust cover is engraved ".45 ACP" inside and out to avoid range blunders. I encourage all non-5.56 uppers to have similar markings. Just bring your dust covers to Things Remembered in your mall, about $5-10 and you're all set. Remind them of right side up, upside down so it can be read open and closed.
Osprey 45 suppressor with fixed barrel spacer in place of then spring.






This adaptor is a proof of concept model and MM intends for the production model to have a last round bolt hold open, and look much prettier. It fits absolutely perfectly in my lower. I opted out of the LRBHO because I think I would have to change the BHO to a modified one that extends to the follower. This would not make for a modular lower as I have several shorty uppers in other calibers I use on this one lower.




Osprey can be used either way, I don't know which I like better aesthetically. The oblong part on bottom is the way it's used on pistols but with taller AR sights it could go upside down and I'm inclined to go that way.



I can't wait to get this baby to the range and make some noise, or not with the Osprey. With a 9" long barrel and long dwell time, I suspect it will be very quiet. I load my .45 to about 850-900 FPS for my 5" 1911 and its stupid quiet with the Osprey.

...

Those are NOT I repeat NOT greasegun mags....they are 30 round Thompson mags...I have both so I know the difference.

Any plans to produce these?

3 Thompson mags for $250 is a rip off. Sarco has them for $20-$30 a piece.

Looking to buy a CAV Lower to run GG mags with the Hahn mag block, but would like to run DI instead of blowback. A few questions:

1. Does anyone sell .45acp DI bolt/barrel combos so I can build everything myself, or am I going to need to buy this as a completed upper?

2. If I can buy the bolt and barrel separately, would it be easier to get reliable feeding with a lightweight (Spikes) bolt carrier and adjustable gas block?

3. With a DI .45acp upper, I understand that the gas block sits a lot closer to the receiver. Would there be room to run a mid length or rifle length Magpul handguard?

1. Yes, send me an email at [email protected] and I'll discuss with you.....normally better to get a complete upper as the propriatery gas system dose not accomodate all handguards on the market and some machining/fitting may be required.

2. Possibly the Bolt carrier might be useful......but as the gas system is unlike anything commercially available....the Spikes gas block is not really usable in a DI45. All the uppers I build come standard with an M16 bolt carrier.

3. Absolutely.....just need to know which so the front sight base can be located properly. I usually don't put them on as 90+% of what I build is a free float handguard using BUIS on the handguard. I don't like to pin sight bases to a .45 barrel. Hope this helps and feel free to ask any further questions. Ask Shel at GWACS Armory about my uppers if you are ordering direct from them...............;-) I am the recommended autohorized supplier for GWACS for Pistol caliber uppers.

You will also need to modify the ejection port of the upper receiver for maximum reliability so access to a milling machine is advised.
Attached is a pic of my personal Cav lower based AR45

When will your magwell blocks for USC mags be in production?

Hopefully in the next 60 days..........

I just put together one of the cnc lowers and not one of my GI GG mags will even come close to being able to be inserted in the mag well.   I remember reading somewhere that they may need squeezing in a vice to get them to fit but I would have hoped that at least one of them would work without tweeking. Any suggestions.

I just checked my newest lower and have the same problem. The mags that fit my first CNC AR45 lower won't go in at all from the bottom. I put one in the vise (again) and squeezed it some more with no luck. The funny thing is that it is very tight, but they will insert from the top until they hang up in the same place at the bottom of the mag well.

I am going to shoot Justin an email in the morning.

Scratch all that.

It occurred to me that the mags I was testing with might have been the Keep Shooting mags and they were. The old milsurp mags I also use in my first AR45 do fit in this new lower. Thank goodness I have a bunch of the originals.

just a VERY light squaring up from front to rear will make them fit fine.....as soon as you eel pressure back off and they will be good to go.....

These are true USC mags and not the wider UMP mags, correct?  Is that a 20 round Promag USC mag in the pic?

Yes...these are the single stack single feed USC mags from promag and that is a 20 round in the pic....they are decent mags...well constructed with steel feed lips molded in......and I was playing at work today....I mean doing Research and Development......and ran a box of Remmington hollow points through the old beater upper (the one with 20K plus rounds through it) and it ate 'em up and the bolt locked back when empty............. We shot an informational video last weekend taking an AR from shooting 5.56 ammo to changing the upper, installing the magwell and firing two mags of .45 ammo to demo the LRBHO in one continious shot....as soon as it is ready .....it is getting gussied up a bit ............................I'll post a link.
Rudy
Here is the video of the original proof of concept test ....the adaptor in the video hasn't grown a last round bolt hold open yet.................it is actually made from scrap metal picked out of the scrap bin......
USC adaptor Proof of concept

What's the typical AR barrel threading for 45acp?  5/8x24 or .578x24?