Kentucky Armory Club

So I picked up a used pac-lite upper for my 22/45 and shot it for the first time today. It had a lot of failures to feed. All were rounds going nose up into the top edge of the chamber. Never had that many issues with the original upper, so I pulled it apart for comparison when I got home. For starters, the pac-lite fits much looser to the frame, but once it's all together there's not much wiggle. The bottoms of the feed ramps are different, but looking at it with a mag inserted the bottom of the feed ramp never comes into play.

The feed ramp to chamber opening however is a different story. The factory is fairly smooth with just the slightest hint of a lip. The pac-lite on the other hand has a very pronounced lip at the top of the feed ramp. Pics below for reference. Just sticking the nose of a bullet in through the ejection port and sliding the rip up the ramp I can tell a difference. The factory one has nearly no resistance between the ramp and into the chamber. The pac-lite has enough of a lip to stop the bullet tip.

Thinking about taking the dremmel and just hitting that lip with a stone bit to smooth it out a bit like an M4 receiver extension. Not taking much off, just getting rid of the sharp edge. Thoughts?

PAC-LITE on the left PAC-LITE Factory

That does look odd... My new MKIV has a lip like that and same feed issues also. Been thinking about doing the same thing you said. My Paclite was insanely reliable. I put a little over 3000rds (95% were suppressed also) through it once without touching it before it started having ejection issues...haha

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ammo used?

Dave1965 wrote:ammo used?

Random assortment. Some lead, some copper jacket, none were immune.

Is it like 1 out of 10, or nearly every round?

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I think I had one mag go without issue. Some had 3-4 per mag

My new MKIV is maybe 1 per mag. Just enough to be annoying as hell...

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Fudge wrote:Let me have it for a week or two. Ill work it over.

Seriously though- niceguys paclite was mine. Thats what I did. Thats why it worked so well.

My 22/45 runs like a sewing machine. Factory upper but its a mirror on any surface that touchs


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I'll second this option! I've owned a few of his old 22/45's. All he messed with were great!

I think you shot the old whore Paclite at the Coleman's years ago...haha

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Fudge wrote:Let me have it for a week or two. Ill work it over.

Seriously though- niceguys paclite was mine. Thats what I did. Thats why it worked so well.

My 22/45 runs like a sewing machine. Factory upper but its a mirror on any surface that touchs


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I mean, I've heard worse ideas...lol

If you must use less aggressive method of smoothing than a rotary tool mounted stone.

I know how much you love the dremmel cranky!!!