Do you still have the Dangerco threaded barrel installed?  Is it possible that the aftermarket barrel is causing the misalignment?  I wonder if you put the original barrel back on if it fixes the issue?  Just throwing darts...

Our insider friend from Huntsville has surplus magazines (17696) on ebay for $15.  More than 10 available.

https://www.ebay.com/itm/Remington-Single-Stack-9mm-7-Round-Stainless-Magazine-for-R51-Pistols-17696/274367902763?epid=2256136206&hash=item3fe199f42b:g:LZ8AAOSwJ-9ewFOH

Here's the link:  https://www.budsgunshop.com/product_info.php/products_id/20231/remington+r51+9mm+magazine+7+round

Yes, and other Huntsville tours. There are also some photos from Elizabethtown R&D center.

Production photos

Production photos

I was always hoping for the updated version of the model 53 which was the .45 ACP version of the model 51.  Supposedly the Marines preferred it over the Colt 1911.  Who knows, it could still happen...  R53?

The same seller on ebay has grips, fiber optic sites, and Gen 2 magazines.  He lives in the neighborhood right next to the Huntsville, plant.  So not sure if he is an employee or knows someone on the inside.  On all three listings he is allowing offers.

https://www.ebay.com/itm/R51-Wooden-Grips/274367896093?hash=item3fe199da1d:g:BGEAAOSwObRem54Y

https://www.ebay.com/itm/R51-Fiber-Optic-Sights/274341153613?hash=item3fe001cb4d:g:IfEAAOSwSPVem5vP

https://www.ebay.com/itm/Remington-Single-Stack-9mm-7-Round-Stainless-Magazine-for-R51-Pistols-17696/274367902763?hash=item3fe199f42b:g:LZ8AAOSwJ-9ewFOH

There are plenty of haters out there.  There are also several folks out there that really love this handgun and have painstakingly sacrificed their time and sanity to figure out what was causing the issues with the model R51, which are actually pretty minimal.  Should Remington have ironed out these quirks prior to consumer release? Yes... but what's the fun in that?  The shortcomings of Remington's manufacturing and QA/QC process have allowed us to become more intimate with, understand, and appreciate the workings of a Pedersen hesitation-locked action handgun.  Here are some things I have learned from this forum and my own experience to ensure the proper function of a model R51:

1.   Read the R51 owner's manual.

2.   Learn and become familiar with the R51 disassembly/reassembly process as it is different than most.  It's not as big of a chore if you know what you are doing.

3.   While disassembled (field stripped), inspect parts for sharp edges and burrs, i.e. ejector and chamber end of barrel.  Make them smooth with a mini file and/or emery cloth.

4.   Polish the feed ramp, chamber, and breech block.  Additionally, you may want to polish the outside of the barrel and hammer.  The slide and action spring glides on the surface of the barrel and the breech block slides over the hammer.  I used a Dremel with felt bits and metal polish. Photos

5.   Disassemble the magazines, remove at least 1/8" from the bottom of the follower legs.  Do not cut any loops from the magazine spring.  Shortening the follower legs provides the necessary clearance between a fully loaded magazine and the breech block.  This will allow you to rack the gun with a full magazine or run 7+1.  If you have ever fired your weapon with 7+1 and had the magazine forced out after the first round, this will solve that issue, among others.  Video

6.   File the inside edge of the bent tab at the nose of the magazine then polish the inside face and edge of the bent tab.  Polish the feed lips on the magazine for good measure.  Polishing both areas will assist in rounds feeding without fault.  Clean and reassemble the magazines.

7.   Thoroughly clean and lubricate your model R51.  Use gun grease on the slide rails, breech block, and hammer.  Use gun oil elsewhere.  It is not necessary to lubricate the firing pin, it will cause carbon build-up after a while and the firing pin will not function properly.

8.   When racking the slide, do so rapidly – pull back and release either by hand or by slide catch.  This gun likes to feed rounds into battery swiftly.

9.   For right handed shooters, take caution not to have your thumb near the slide catch.  The slightest pressure on the slide catch will lock the slide open during the cycle.  This can also be caused by not installing the slide catch correctly.  Make sure the slide catch lever tab is under the slide catch spring tail.

10.   If you are shooting low on your target, the correct sight picture for this pistol is acquired by using the combat hold: the center of the front sight dot completely covers the bullseye.  This is due to the low bore axis design of the pistol.

11.   Different brands, types, and weights of 9mm Luger and 9mm Luger +P ammunition work in this pistol.  You should test which works best for you and your model R51.

12.   If you still have issues (doubtful), use the "search" function in this forum.  There is a wealth of information and knowledge to be gained from previous posts.  Plus, the subject of a post may not be what the conversation has morphed into.

Sorry to resurrect an old post.  It looks like the mags with the P/N F304502 were from an authorized Remington warranty center.  The Gravel Agency is their OEM parts manufacturer and warranty center in Canada.  Remington doesn't post this information on their US website.  Perhaps the Gravel Agency was handling all the warranty issues for the R51?  P/N 17696 is the US retail equivalent.

https://www.remingtoncountrycanada.com/remen/replacement-parts-oem/remington/handgun/r51.html

https://remingtoncanada.com/en/support/repair-service

I personally have never had an issue with the slide catch spring.  Every video out there warns about the spring but, like I said, I have never had that issue.  I always make sure that when reassembling the slide catch that I have the lever slightly rotated lower than the spring, then as I push the lever in, it is below the spring.

Just curious, do you have a Charlotte or Huntsville model?

Also, if you can, post a pic of the what the spring looks like with the slide catch removed.

Welcome to the forum!  Glad to hear both of the Gen 1 and Gen 2 R51s worked well for you.  Keep posting your impressions on the forum.

Bill,

Yeah it would be a nice addition to have.  Currently there is nothing out there.  Cameron is supposed to be making some more triggers but I think that is on hold for now.  Check here for updates:

https://dangerco.us/

Yes, I bought 4 of them.  They are the new version of the magazine, identical to the mags that came with the gun in the box.

Quote from: pfm41 on November 20, 2018, 07:09:52 AM
I think one of the purposes of the tab at the front is to move the rounds back into position when they come to the top.  Recoil from the previous rounds will probably cause the waiting rounds to move forward; the shorter it is the farther it moves.  A burr on the bottom edge will cause them to hang up instead of sliding across the edge and back into position.  Both of my magazines would put a scratch on the bullet until I polished the tab.

PFM- After shortening the legs about 1/8" on the followers, I noticed an interesting thing, when I would hold a fully loaded magazine in my hand and try to remove the first round with my thumb, the second round would nose dive at the bent tab.  I took your advice and filed the inner edge of the tab then polished it with my Dremel.  I also polished the feed lips for good measure.  No more nose dives!  The next cartridge pops right into place.  Can't wait to see how it performs at the range.  Thanks for the tip!