Recent content by Sixtysixdeuce

Hi all, haven't posted in awhile, been busy with non-model engine projects. One of those has been making custom muzzle brakes and compensators out of 6/4 gr. 5 Ti, of which I have a decent amount, and it occurred to me that it might be kinda interesting to use it for crank and rod in a small...

Still no word from ATF, but we're getting pretty close on the project. All that really remains is the forward assist and the real barrel. Dust cover is done, milled from 4140, as I didn't feel like machining dies to form it from sheet metal. Also done are the flash hider, front hand guard...

No answer yet. Gubbermint agency, so I wasn't anticipating expediency..............

Guess this thread is past due for an update! Got a hand guard built a little while back. I made the mistake of halving the Midwest Industries one I had on hand with no consideration for centerline to top of rail on my miniature upper, so the rail heights are mismatched 0.036", but oh well...

Yeah..........draconian gun laws are the primary reason I could never live in those nations where you drive on the wrong side of the road. :D Back on topic, when I was cutting the hammer, I forgot to account for the 13/16" radius at the rear of the receivers, which puts the upper a little...

You can use as many off-the-shelf parts as you want for any "sporting" firearm, and as may domestically produced parts as you like in any firearm. What that text refers to are provisions of section 922, which prohibit the importation of non-sporting firearms. That is why you see some goofy...

Exactly. And it's difficult to justify making special fixtures for one-off parts when I'm usually able to find a way to secure things pretty well for the tolerances I need to hold, which are nowhere near tenths. Heck, I don't even own measuring tools that are accurate to <0.0005". For most of...

Very tough to clamp something that thin tightly enough to cut without crushing it. This is also annealed 4140, so while tough, it will bend, which happened a couple of times when the cutter got a good bite, and when drilling through the front. Remember, the bulk of the handle is just...

Got the charging handle done late last night. That ended up being a lot more work than anticipated, with a lot of careful fitting to get everything sliding smoothly. about 6 hours all in. I did goof a little and overran my numbers where the rear should be profiled to fit the horizontal cut in...

Don't mean to answer for him, but yes. You're looking at the business end of the flying tank and it's 30mm GAU-8 cannon.

Hahaha. A friend of mine runs an injection molding business; if I were inclined to build the mold, he'd run it. Lot of work for a one-off, though; much easier to mill them out of ABS, acetyl or whatever else I have lying about. That's how the grip was done, and how the stock and hand guards...

Not to derail my own thread, but yeah, the anti gun crowd has been using that post hoc argument for a long, long time. Any reasonable person sees it for what it is; just as ridiculous as blaming the automaker, distillery/brewery, bar owner, etc. for a DUI crash. People will use whatever...

The end mill was just still hanging out from cutting the profile. I centered the quill over the piece and used slight down pressure of the quill on the die to keep it straight. Did the same thing on the receiver extension, except in that case, I was going for 100% threads on a piece with only...

It is dubbed AR-7.5, a 50% scale AR-15. I give you my partial build as it sits now, nearing the close of week 3 and after about 75-80 hours of machine and finishing work: That is a normal 5.56 size AR receiver on top. Don't know how many we have here who are familiar with the...

Steve-Yours is definitely prettier! And I'm sure you're holding better tolerances. Like I said, there's a great deal that is off on this, as I'm not working from plans at all, making it up as I go, and doing a fair amount of eyeballing. This is for fun, and for me to gain experience in...