k2pichu

I bought both 1.57 and 1.93 and the higher mount fit me better. With the 1.57, I had to scrunch up behind the gun or else the dot would be in the upper part of the window. When I mount with a 1.93, the dot is centered every time. I think you mean higher over bore / mechanical offset instead of parallax which is something different. It's only .36 higher initially, and that shrinks as you approach your zero distance. It's not really noticeable when you're actually shooting. You have to adjust for offset no matter what setup you have so you might as well practice with the one that feels more comfortable for you.

I use scalarworks 1.93 + arisaka (tall plate) with SRO's. 507 would be a good option that's $200 cheaper per optic.

I have a Taylor Freelance one and it works well. I've heard good things about the Techwell one too. I don't think there's that big of a difference between the two in terms of performance.

If you're just shooting PCC for fun and enjoy gunsmithing, there's nothing wrong with modding it to see if you can come up with a solution, but if you plan on competing seriously in PCC, I'd just sell it and buy something else. The time you spend tinkering and the money you spend on parts and ammo while testing easily allows you to just buy a more reliable PCC.

For me, mount at 10 yards is .65 - .80 and my splits are around .15 so that maths out to 1.4 - 1.55s for a bill drill. You're time is isn't far off, but 3C's are going to hurt. I can do .15 splits at a 25 yard target and get 2A off one sight picture without any issue. What's your technique like? I recommend watching this video on how to properly hold the PCC: For reference, I have a JP5 and I've shoot a mix of Supervel and Blazer Brass. It's probably not the gun or ammo tbh. Buy a JP5.

As a fun experiment, I tried to increase the weight of my M&P with tungsten infused epoxy around the grip. I did it in a few layers, but I got the weight up by about 8.8 oz in the end. I haven't had a chance to live fire it, but I'll report back when I do. Total weight is 45 oz with flashlight and mag.

I've been shooting Supervel PCC blitz recently which is 1.12 OAL according to the website. I've no issues with oem glock mags and TTI. That said, it sounds like everyone's guns have a preference. If Glock + TTI doesn't work in your setup, you might as well try some of the other options mentioned to see what works for you.

I run SRO's on my PCC and they've been 100% for me. I used to run a Sig Romeo 8H which is somewhat comparable to an Eotech in form factor, but it was quite heavy. I've heard of longevity issues with the SIG 3XLs, but that's purely anecdotal from people I've talked to at local matches.

TREX Arms makes light compatible holsters for the M&P. I use one for my M&P + x300, but they also support TLR-1. I run mine on a Safariland QLS system, but their holsters support all the major mounting patterns.

I use Weber Tactical (https://www.webertactical.com/product/gamer-glock-9-40-pcc#product_detail). It's pricier than other options, but well built. It also has more options for customizing colors if you care for that.

Weber Tactical makes mag pouches for glock PCC mags. They are on the pricier side, but well built and is what I use.

The 10 round glock mags "disappear" inside of my JP5 + magwell, which makes it awkward to reload with. I would go for the big sticks and pin it or put a blocker inside of it since it'll be easier to grab. However, it might be look a bit funny with you carrying 4-5 big sticks on your belt running around. I've seen some people use G17 mags + base plates which might be a good compromise, but generally the point of PCC is you don't have to reload In case you haven't seen, there's another recent thread discussing magazines and extensions:

Cool story, but for USPSA, my point still stands as it has a max round count of 32 and a TTI extensions hold 40/41 rounds. If you're missing 8-9 shots on a USPSA stage with a PCC, you've got bigger problems than what mags you're using.

I used some pliers and ripped out the tabs. Not sure if you have to or not. It was easy to do and I've no issues with taking off and putting on the extension.

TTI are toolless to disassemble and reassemble. There's a push pin that's friction fit that holds it on. Though with PCC, there's no reason to have to take apart your mags to clean between stages since you aren't dropping them.