Patrick Sweeney Posted August 13, 2001 Share Posted August 13, 2001 In an earlier thread, someone asked about the JP comps. We just had our 3-gun match, and I had a chance to shoot a few comps and compare. (I ran the 40-round rifle stage, lots of runnin' and gunnin'.) McArthur: The "coke can" of comps, it is so efficient at diverting gas it will blast paint off a baricade. I can see the bullet strike on a plate at 100 yards, and the crosshairs don't leave the plate. JP: Tames the jump and recoil, but the crosshairs jerked from side to side. I had to push the crosshairs back on the plate, even when adjusting buttstock seat and body position. It pushed right, unless I made a strong effort to get the stock as close to my centerline as I could, then it drifted left. I couldn't find a center position that kept it from tracking. Clark: More violent, but it was on a 16" barrel. The crosshairs vibrated around the plate, with no predictable pattern. I'd like to try it on a 20" barrel, as I think the longer barrel would dampen the observed vibration. Sweeney comp: A series I made some years ago, and stopped making when the McArthur proved smoother. Too bad, as it makes the size limit for Limited guns now. The muzzle rose just a bit over the plate, straight up, and was easily pulled down the small amount to get back on steel. Modified A2 birdcage: An SOF sleeper comp, unless you know what to look for you can't tell it from a standard flash hider. The muzzle doesn't rise, but there is no dampening of the vibration or recoil. Useful only in an SOF context where you can't have any comp at all. I hope this proves useful to you all. Link to comment Share on other sites More sharing options...
Bill H Posted August 13, 2001 Share Posted August 13, 2001 Patrick do you have a phone # for McArthur? Gotta try a coke can. Bill Hearne Link to comment Share on other sites More sharing options...
Patrick Sweeney Posted August 13, 2001 Author Share Posted August 13, 2001 Yes, Flint 'n Frizzen Gun shop, 810-625-3333. Say hi for me. Link to comment Share on other sites More sharing options...
Even Posted August 13, 2001 Share Posted August 13, 2001 Patrick, could you help me out with a picture of the McArthur comp? Even Link to comment Share on other sites More sharing options...
Flexmoney Posted August 13, 2001 Share Posted August 13, 2001 Patrick, You da man. Link to comment Share on other sites More sharing options...
Bill H Posted August 14, 2001 Share Posted August 14, 2001 Thanks Patrick. I have a McArthur ordered. He said he was about a month behind. Your experience with the JP is what I see also when shooting. It has been the best brake I have used so far.Hopefully the the "Coke Can" will do better. Bill Hearne Link to comment Share on other sites More sharing options...
kellyn Posted August 14, 2001 Share Posted August 14, 2001 I did not care for the modified A2 birdcage as it came from EGW. In my experience and with my loads, it "overcompensated" and blew the muzzle dramatically downward. I could watch the sight go from the A zone to beaneath the target. I had to have the hole cut to a greater diameter. Even then it has - as Pat noted - a lot of vibration. Since SOF has broadened the comp rule I would steer clear. I've never shot a McArthur, I'll have to check that out. Link to comment Share on other sites More sharing options...
Chriss Grube Posted August 14, 2001 Share Posted August 14, 2001 Kelly, I had the same problem with the EGW comp. Mine was on a 16" barrel. George has been playing with my gun for the last month. He finally has it all worked out. We had it to the range last Thurs. test firing. It now works great. It is totally redesigned. I'm not sure yet if he is going to make them for general sale. I'll let you know Fri. Link to comment Share on other sites More sharing options...
Patrick Sweeney Posted August 15, 2001 Author Share Posted August 15, 2001 When I was making comps, I went the A2 birdcage route for a "stealth comp" and found I had to use two different internal diameters for 20" and 16" barrels. The only reason to use thm was because the rules forbade "comps" but allowed flash hiders. And, maybe for antry teams and the like, who can't use a real comp but would want every advantage, real or imagined. I don't have a digital camera, so it will be tough getting a photo up. But I'll see what I can do. Link to comment Share on other sites More sharing options...
DblTap Posted August 19, 2001 Share Posted August 19, 2001 I know it's not as high tech as a JP, Berquist, etc, but the Wilson Combat Tac Brake is a good choice. It does a good job of stabilizing the muzzle, is not nearly as loud as most other brakes, looks good and isn't a half bad flash hider. What the heck, it's very reasonably priced as well! Link to comment Share on other sites More sharing options...
Ross Chevalier Posted August 22, 2001 Share Posted August 22, 2001 I have a pair of Bushmasters with the A2 style flash hiders. When (after reading this section) I looked more closely, I see that the bottom of the flash hider (for lack of a better name) is closed off like the EGW comp (as best I can tell from the web site - you wouldn't believe the hassle getting gun parts shipped up here). Could any of the experts on the forum advise whether this is providing any compensation at all? Thank you, Ross Link to comment Share on other sites More sharing options...
Bill Schwab Posted August 22, 2001 Share Posted August 22, 2001 Ross, I am no expert, but my understanding is that the A2 style flash hider had a closed bottom for two reasons: a) to prevent the muzzle blast from blowing dirt up off the ground when firing in the prone or foxhole positions to provide a mild compensation effect I cannot comment on the effectiveness of the "mild compensation effect" because I've never shot the A1 hider vs the A2 hider on the same configuration AR, BUT I have shot the M16A1 and A2 and know that there's a big differnce in controllability that I would say is mostly due to the extra weight and longer stock of the A2. Hope this helps. Bill Link to comment Share on other sites More sharing options...
Patrick Sweeney Posted August 22, 2001 Author Share Posted August 22, 2001 The A2 flash hider offers a very minimal compensation over the A1 or a bare muzzle. to increase its effect, you hav eto bore the interior out to a cylindrical shape, and I don't recall what the correct diameter is off the top of my head. When you do that, it dampens vertical rise, but still does nothing to tame the rearward component of recoil. Some would argue the "recoil" of an AR is too small to bother reducing. They are called also-rans. The bored-out A2 trick is useful Only when comps are prohibited (and they don't peer into your flash hider) or in tactical work where a real comp in a hallway would be blasting your team members. Link to comment Share on other sites More sharing options...
kellyn Posted August 23, 2001 Share Posted August 23, 2001 Before they allowed comps in Limited, I used a "caveman" comp: lead. In highpower, heavy ARs using lead weights in the butt and under the handguards are the norm. I adopted this in practical shooting. For 2 years, I shot the Mystery Mtn match w/ a 15 lb AR. You want to talk about no recoil! The front sight hardly moved. It was as effective as any comp that I have seen on a limited rifle. Luckily, I only had to carry the rifle from my truck to line. Link to comment Share on other sites More sharing options...
Ross Chevalier Posted August 23, 2001 Share Posted August 23, 2001 Bill, Patrick and Kelly, thanks a bunch for the comments. Since I've never tried removing the flash hider, does anyone have recommendations on a comp and installation process I could perform myself? Thanks, Ross Link to comment Share on other sites More sharing options...
Patrick Sweeney Posted August 28, 2001 Author Share Posted August 28, 2001 Ross, If they are post-ban those comps/flash hiders are soldered on and you aren't removing them without a lathe. If they are pre-ban then they're simply threaded on. If it is solder, you'll see the joint. You can install a threaded pre-ban barrel on a post-ban rifle if you permanently attach the comp. That means solder, welding or a blind or welded cross pin. You should show it to a gunsmith with experience in these things to see what's up. Link to comment Share on other sites More sharing options...
Chris Posted September 3, 2001 Share Posted September 3, 2001 Patrick, I have a Grade I JP AR-15 with a 20" barrel and his comp obviously. I can spot every shot on an 8" plate at 200 yards off the bipod rapid fire. No side to side or up and down at all. I also have the stock full of old 200 gr. .40 bullets resulting in a 14lb rifle My buddy has the bolt on JP comp on a normal heavy barrel AR and has no problems either. Link to comment Share on other sites More sharing options...
Patrick Sweeney Posted September 4, 2001 Author Share Posted September 4, 2001 I tried the rifles offhand. A bipod is going to hide differences between comps, and the lead, well, if I want to shoot something that weigh in the teens, I'll drive north and borrow Richard's BAR for an afternoon. Link to comment Share on other sites More sharing options...
Flexmoney Posted October 17, 2002 Share Posted October 17, 2002 I wanted to bump this thread to the top. Any new info? Link to comment Share on other sites More sharing options...
ErikW Posted October 17, 2002 Share Posted October 17, 2002 Chris rocks with his Mongo rifle. The thing doesn't move. He took plates at 200 yards faster than the ROs could call them hits. Link to comment Share on other sites More sharing options...
shred Posted October 17, 2002 Share Posted October 17, 2002 Any thoughts on the Miculek comp as seen in the Dillon catalog? The JP is way-cool, but not Limited OK. Link to comment Share on other sites More sharing options...
TDean Posted October 17, 2002 Share Posted October 17, 2002 I haven't seen mention of ther SMITH brake? Link to comment Share on other sites More sharing options...
ErikW Posted October 17, 2002 Share Posted October 17, 2002 shred, there is a Limited-legal JP comp, known as the Cooley tactical <cough> model. I picked one up from the RGN prize table. I shot one at the 3GN after my rifle died. Link to comment Share on other sites More sharing options...
actionshooter Posted October 18, 2002 Share Posted October 18, 2002 Has anyone noticed any changes in accuracy when changing comps? I was shooting a homemade A2 comp (washer welded on the end) and then switched to a JP,seemed my groups opened .50 when I switched. Why? Steve Link to comment Share on other sites More sharing options...
BigDave Posted October 18, 2002 Share Posted October 18, 2002 Handloads or factory? Maybe your homemade comp was more efficient or utilized what porting you did have better than the JP. Perhaps the JP would be more accurate with a different load/bullet weight/pressure? Link to comment Share on other sites More sharing options...
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