L9X25

While USPSA courses usually cap at 32 rounds, that can include numerous steel shots. Having more than is required is a good thing. I think the most popular extension is the TF +10 that usually gives around 41 rounds. It does not extend the mag enough that it becomes a problem and are usually pretty reliable. The MBX have not been out as long, but are likely as reliable as the TF extensions. If you plan to strictly shoot USPSA, you will likely not need more than ~40 rounds for any stage, if you plan to shoot outlaw matches, there is no limitation and you can see 40-50 round stages.

I have several ETS mags and they have worked perfectly as they came, or with the Taccom extension. I have (2) 31's that are spliced together for a 64 round mag. No problems with the mags. Like many others, the ETS do not tolerate sand, and that makes them unreliable. When clean they are 100% I have read where Taccom tested their extension on several factory Glock mags and half would not work with extensions, regardless of how much work he put into them. I have done little to no work on the ETS to make them work with extensions. The ETS are very inexpensive at $15 each.

What is the pull weight on the Elf?

That is the "New" Taccom firing pin.

I had two lite strikes during a match and went to the safe area and found that the pin was broken. With no spare I cleaned out the pin tunnel and got out some metal chips and put it back together. I shot 3 more stages with no more lite strikes. Now I keep 2 spare pins in my bag.

Looks like a Taccom

I have a rifle with a ramped barrel and another without. Both have fed 100% with the same magazines. I would assume that the ramped barrel would have the edge if my magazines had weak springs or were dirty, but a ramped barrel is not necessary to have a rifle be 100% reliable with good magazines.

Steve, The projectile enters the chamber while the rear of the case is still controlled within the feed lips of the magazine. At that point, the bullet has to feed into the chamber since it would have to back out of the chamber to mis-feed.

Mine is one of the 6 bolt extensions, but the ETS magazines don't tolerate any sand in them. I had to take mine apart between stages and was scared that I would lose a bolt. Thankfully, it went fine and the magazine has not failed me when clean. After dropping it (accidentally) I tested it and it was 100% a baby rattle, and caused the cleaning.

@TRUBL I have had one of your extensions on an ETS for several months now. I followed the usual bevel the follower feet and round sharp edges but that was not enough. I ended up slightly rounding the sharp edge on the extension (back section) and everything has been perfect since. The fact that you can put half of the extension on at a time lets you run your fingers across the joints and find any sharp edges or places where material needs to be removed. If you could only design it with a trap door bottom so it would be easier to clean ...

That is precisely what they said in the video from the Shot Show that got my attention. They said that they moved the magazine closer to the barrel so that the rounds feed into the chamber before they leave the magazine. Basically a "controlled feed" where the rounds are never loose. Sounded like an outstanding idea to me! Then I pulled out my JP and my NFA and found out that they both did the exact same thing, just had never bothered to mention it because the majority of the competition has done the same thing. But I have to give them credit for their marketing idea!

I think I remember a video of their booth at the Shot Show where they made some pretty impressive claims about their design. After further analysis, they were not really that different to what is being produced by everyone else, just that nobody was illustrating those specific features.

If you are expecting a 6 lb trigger and it turns out to be 7 lbs, they missed by just over 16%. If you are expecting a 2 lb, and get a 2.6, they missed by 30%. I don't think that anybody promises a 2 lb trigger for an AR9, and that is one of the reasons that I keep my JP triggers. Other than having to be polished and adjusted by the installer, they seem to give great results. Good enough that I would not spend the money to replace them with something else. If I did not already have a JP, I would likely buy a Hiperfire because of price.

This may just be attributable to pure luck, but all (3) of my JP triggers break at about 2 lbs, my CTR is about 1.75 and my GMR is just under 2 lbs with a third right at 2 lbs. Because of the design, they have zero take-up and short throw with no creep. I replaced the springs with the JP reduced power springs on the one trigger that did not already come with the yellow reduced power springs.

Just curious, what was your pull weight with the JP?

In that case, your other alternative would be to replace the hammer spring with a reduced power spring. I know that JP offers their yellow spring, but I have no idea how that compares with what Hiperfire comes with. You can also go too far with that and the toggle springs can overpower the hammer spring to where the hammer never falls.

Anti-walk pins can raise the trigger pull of some triggers.

No Sir, I believe I have that distinction. My 115gr load was 4.6 grains with a 115 FMJ @ 1.160

When I got my gun the Glock mags were expensive and not readily available. ETS mags were plentiful and cheap, so I got several of them. The ETS mags work great for me, including with long extensions on them, but they do not seem to tolerate sand as well as Glocks. If they drop to the ground, you should disassemble and clean them, or risk a baby rattle. I do not consider a dirty mag failing to be a fault of the mag.

The Taccom buffer is pretty much compatible with any bolt, since it uses the standard spring configuration. The JP SCS set-up is not compatible with some bolts and may require that you remove the accessory weight from other bolts. It features a "guide rod" that must fit into the hollow section of the bolt for the rifle to function. If the bore of the bolt is too small, or the removable weight is not removed, the guide rod will not allow the bolt to cycle.

That is a true statement. Most of these guns are very shootable, just the way they come out of the box. It's just that tinkerers have to tinker ... it's what we do. We find something good and attempt to make it great. I was happy with my gun and the .308 Carbine spring, it functioned perfectly and felt pretty good. It was only when I tried the .223 spring that I realized it was better. I have worked on the gun and loads until I am satisfied that I have found the sweet spot for how I like it to shoot and feel. I have reached Mikie's point of "stop experimenting and start shooting" because the gun is good enough. Sadly, I have been unable to find a good deal on a batch of youth and skill to purchase.

This ^ I would likely go finer than 60 grit, maybe 200-400, but I always modify the cheaper part when there is a conflict. If you were having a problem to where ALL mags would not drop, then I would consider having the lower repaired, but if some work fine, fix the few offending mags. I would hate to have some mags fit loose to where they cause jams or drop mags to accommodate a few fat mags. My .02c

Mine felt better with the standard JP .223 Carbine spring, but my target is about 130PF. Some people that shoot factory, or higher power factors, like the .308 Carbine best.

Taccom sells replacement springs for their 58-60 round extensions. I purchased several of those and they can be cut down to whatever is needed. I use one in my 33+33 splice mag and it works fine with ~65 and eliminates the need to solder together the springs.

I believe that the follower makes the transition from the mag body into the base pad at 35 ... you need to bevel the bottom of the follower legs more to keep them from catching on the edge. Breaking the edge on the basepad might not hurt either.