You should look into "Operation Fishbowl"
There are a few YouTube videos on it. Operations Dominic and Fishbowl. Dominic = God....hummmm. Fishbowl of God. :D
You can open it up, but you will have to change out the extractor as well. You will need to upgrade to the Sako or M16 style extractor because you will taking out the groove that the original extractor sat in. I open up the bolt face larger than necessary and then solder in a ring, then open...
I recently (Dec 17) ordered a barrel fluting cutter. It shipped on the 19th and had it in my hands on the 22nd and a barrel fluted by the 23rd. Everything worked as it should. I just placed an order for some custom ground chamber reamers. Anxious to get those in hand although I know it will take...
upgrading the .125 detent ball to a .140 ball and stiffer spring under the extractor will help it hold on to your brass so the ejector can do it's job.
I've got a 1st Gen Colt Delta Elite as an EDC. It's been very reliable since out of the box. It gets a new recoil spring periodically (24#), has a full length tungsten recoil spring guide and flat bottom firing pin stop. It runs great, all the time! In town it carries Triton Quick shock 155gr...
As others have said, it sometimes takes a very long time to get stuff from them, but I've gotten several bolt and plenty of reamer, bottom metal, extractors etc. from them and the quality has always been exceptional.
The G5 Montec 100gr! and you can resharpen them really easy! My buddy uses the slick trick mag. Both our arrows fly to same POI and fly true to target points! Massive blood trails and exit wounds and no broken blades!
PTG Sako extractors are also about $10 cheaper than you can find at Brownell's so I order several so I have them on hand when I need them instead of then waiting 3-4 weeks, same goes for their recoil lugs! I've never had a problem with those items.
I've ordered many custom ground reamers from PTG over the years and although the wait times have always been about 6-8 weeks every single time I have gotten exactly what I ordered.
I was in your shoes about 3 weeks ago. No, you really can't use the cup to thread the hole (I tried) it wants to wander and chip and push out and crack the layed up portion of the stock. You really need the tap to CUT threads rather than displace the material.
I ordered on Amazon for $18 and...