LtdShooter

Get the Hahn dedicated mag block (adapter). The dedicated version goes in from the top and is held in place by the bolt release. I shot a Colt SMG mag fed PCC for many 1000's of rounds a couple of yrs ago with the Hahn and it was flawless. They are not cheap (around $200) but worth it if you want to stay with the platform.

I can think of a hell of a lot better use for $239 than putting it into a charging handle!

+1 Mag Well is the balance point I have and would recommend.

On my RO unless they give me a snarly or rather uniformed look then in in my right rear pocket.

I know I'll take some heat for this but building a budget PCC is folly if you intend to use it in competition. I've seen way too many not deliver the performance and reliability needed for a match. If the PCC is for causal fun that is another story. I subscribe to the "buy once, cry once" approach and as such the barrel, bolt and buffer systems in my PCC's are all JP with triggers being Hyperfire or POF. There are certainly other high quality options out there but the key is quality, proven components if you are wanting serious results.

I'm running 124 Precision Delta's at 1.125 with absolutely no issues (5000+ rounds so far this season) in 32 round Glock Mags with the +10 TF., 51 Rd Goliath or the 57 round TACCOM extensions. I leave the One Shot Lube on the brass and I clean my mags regularly and will Spray some TFE dry lube in the mag bodies when cleaning them.

Using the 124 gr Precision Delta at 1.125 OAL and runs in all mags - including Goliath, TF +10 and the TACCOM. I've loaded out to your desired OAL with a FMJ RN but with my current bullet selection the 1.125 is flawless with great accuracy. Hope this helps....

Been running Gunzilla on the last 2 PCC's. Run the bolts and interior of the upper wet and never had an issue on many 1000's of rounds. Carbon wipes off with a dry cloth and no appreciable wear on any of the parts.

I'm assuming you are meaning the Everglades 124 JHP?? N320 is the way to go as it's super clean and accurate. 3.9gr at 1.125 OAL to start should put the PF around what you are looking for....

+1 on what Bwillis noted.... I'm running an SLR 13.7 on a 14.5 barrel. Barrel is completely in the HG and comp is fully outside. Perfect match. One thing you may want to consider is putting a small hand stop at the end of the HG. With your supporting arm fully extended its pretty easy to get your off hand close to the comp (not a good thing).

I'm currently running 3 tungsten and 2 steel in my SS SCS at a 140 PF (124 gr with N320) and it feels nice. Sharp but dead flat.

Here is my solution for the 31 rd mag.... http://taylorfreelancestore.com/glock-supercap-3-red/ or http://taylorfreelancestore.com/glock-supercap-3-delrin/

Contact Brian Miller https://forums.brianenos.com/profile/29808-bmiller/ His magwells are great.

+1 for Weber Tactical. Got them for my Colt and Glock PCCs. Great Stuff!

The barrel nut will have an ID of 1.00 or so....