Matt Cheely

A RMR is about the only thing that I would consider mounting to a slide. Trijicon makes a mount to fit the 1911 now, but still requires milling the slide to fit.

http://stores.kensight.com/kensight-elevation-spring-set-bomar-bmcs-1911-sight/

I've never had one of my comps crack or fail. I don't run porting on my gun, but I do put a couple of holes in guns for customers that like it a little flatter. It is important to note that there are multiple grades of titanium, the kind I use for comps is 6 times more expensive than your run of the mill titanium stock.

I'd go for the RMR07, 6.5 MOA dot, adjustable brightness. https://www.trijicon.com/na_en/products/product3.php?pid=RM07

I've never had a comp wrecked due to powder erosion. I've shot Ti comps for every open gun I've ever had & never even saw signs of it. Had a gun I built with 100k+ rounds in for a rebarrel due to the rifling being mostly gone, we replaced the barrel, but kept the Ti comp.

My comp design cut into a trubor blank is actually almost the exact same weight as a full 5.4" bull with a Ti comp on it.

I suppose I will add my 2 cents while I'm here. What are we trying to accomplish with the comp? Keep the muzzle down and reduce recoil. How do you do that? Surfaces that the gas runs into relativity perpendicular to the bore will reduce the energy transferred to the slide thus reducing recoil, and the mass and velocity of the gas going up & out will push the muzzle down. Unfortunately it's very easy to do too much of both of these in the search of "the best/flattest comp out there". It's all a balancing act. Remove too much energy with a "brake" type of a comp and the gun doesn't run well. It takes a certain amount of energy to cycle the slide, and you need some more on top of that to make it reliable in all instances. To much comp pushing the barrel down and you get a dot that first tracks down, then up, and then back down again, or just wiggles all over the place. I just installed a "not to be named comp" that was so effective it blew the muzzle down when you pulled the trigger, basically impossible to shoot. On the other hand, I've shot short guns that were so violent and flat it was more like the dot exploded when you pulled the trigger. Now where did my shot go again? We're trying to make the dot track predictably and that usually means as straight up and down as possible (usually ends up being up and to right right a bit). It's all a balancing act. In addition to that is what YOU like in a comp. I prefer something with a little more lift, I find it much easier to call shots. Heck, look at the setup Max uses, it's a Trubor with a nearly full weight slide. YOU might like something different.

Thanks will email hom now. Any word back from him on this? I too am interested in running his comp but not a fan of Ti I have some stainless stock that's waiting on machine time. I'll have them done in the next couple of weeks. Working on scope mounts at the moment.

Can't wait to see this, the trailer is outstanding!

CZ and EAA parts have always been slow to sell in the US, not going to put the effort into it. Not the answer I wanted to hear Buy 50 and I'll make them for you

CZ and EAA parts have always been slow to sell in the US, not going to put the effort into it.

I think I've gotten enough requests, we're probably going to look at making a mount for it next month.

It's .075" off to the left. Makes for a cleaner looking mount that is only as wide as the scope body without any extra material hanging off the side.

My go to load is 147gr MG on top of N320. I load them up to 135-140pf though. I like to get the gun moving a bit more.

Blast from the past, 10 year old thread!

Here's the prize gun for the match.

The tungsten barrel might be lighter than an open gun barrel, but on the open gun we're removing a lot of energy from the system with the comp. Hence the need for a 8lb spring in my open gun. The tungsten barrel is going to hit with much more force. Whether or not it will survive 100k rounds is why you should build one and find out.Jethro's gun is more than 100k rounds boss and he's using a 10lbs spring on 170pf Cool. They can last. That's good to know.

The tungsten barrel might be lighter than an open gun barrel, but on the open gun we're removing a lot of energy from the system with the comp. Hence the need for a 8lb spring in my open gun. The tungsten barrel is going to hit with much more force. Whether or not it will survive 100k rounds is why you should build one and find out.

Try Newtons 3rd law on for size. The heavy barrel is "slowing" the recoil at the very beginning of the impulse and then disengaging from the slide to let it do it's thing. It will spread the total impulse over a longer period of time. You'll get that heavy barrel stopping in the frame, and then later the slide will stop. It could be perceived as less recoil due to a lower peak force. However we usually go for lighter moving mass as the quicker impulse feels faster. Otherwise you'd see guns with really heavy slides, which we don't.

Lets figure out that FRE equation you provided. If we assume a limited gun weighing 38 oz, 180gr bullet at 175pf, we get 4.237 ft/lb. Add 3oz onto the weight of the gun, and we get 3.927 ft/lb. That's a ~7.5% decrease in kinetic energy. That's only for a free recoiling firearm. ie, one that isn't being held. Yes, the lighter gun will have more kinetic energy after a given distance traveled than the heavy gun, in the same way the lighter can has more kinetic energy than the heavy can at the same height. But you're there to hold the gun, so the energy is transferred into you instead. We're still just changing the way the energy (recoil) is felt. Not to mention, this is just calculating F.R.E. based on the total weight of the gun. So you had better hang your 12oz can of paint from the grip so the recoil is "less", it'll work better than the tungsten barrel. Or: If the recoil is "less" where did that energy go if not into your hands? http://en.wikipedia.org/wiki/Conservation_of_energy

Actually, lets do it. Assume that the can absorbs the same amount of energy from the M80 if it's light or heavy. You turn that into Kinetic energy with the can accelerating upwards. Force = Mass x Acceleration. Since the can weighs less, the acceleration will be higher. As the can gets higher, the kinetic energy is traded for potential energy. Potential Energy = Mass x Gravity (acceleration towards the earth) x Height. So if the empty can has 10x less mass than the full can, it will have the same potential energy when it is 10x farther up in the air. Still the same energy. (Of course we are negating friction to drag & other influences.) So I suppose you're right, you can make a can fly farther up into the air with a M80 if it weighs less. Of course this still has nothing to do with a heavy gun. We're not accelerating the gun, we're absorbing the energy of the bullet leaving the barrel. You're just changing the feel.

Seriously!? I don't have a whole lot of edumacation but I know I can't send a paint can full of sand near as far into the air with a M-80 as I can when it's empty, just sayin. I should go get the $$,$$$ back that I spent all those years to get my bachelors degree then shouldn't I? I'd write you out the equations to prove it but I'd rather drink my beer.

Simple physics will tell you that if the same energy is going out the front of the gun, the same is going into the shooters hands. You're just changing the perception of the recoil. I'm sure if Jethro was shooting a regular bull barrel he would have beaten Blake anyway.

The top black QPQ coating can wear off after a while, but can be reapplied. With chrome it shines up from use / wear. Chrome cleans easier, but I think nitride is slightly better in the long haul.

No extra tolerance built in. There is technically a little added to the part but it's so minimal that you can ignore it.