Flatland Shooter Posted June 24, 2017 Share Posted June 24, 2017 I'm in need of a stainless steel muzzle brake for a 9mm PCC barrel with 1/2-28 threads. A Miculek style comp would be great. Since I'm in the camp where we don't feel the compensators do much to reduce muzzle movement (at least not with128 PF loads), I just want one to direct a little noise back at the RO. I put a similar comp on another 9mm barrel and it cuts back on mandatory reshoots. So there is not much on the market to my liking but an inexpensive .223 brake off of eBay would work if I can drill out the bore to 9mm. I don't have access to a lathe or mill, only a vise and an inexpensive drill press. If I give it a try, I plan on using a 13/32" cobalt drill bit. Good idea or a waste of time and money? Bill Link to comment
aandabooks Posted June 24, 2017 Share Posted June 24, 2017 13/32" is .343. You'll be undersize unless you are counting on drilling oversize due to chuck wobble and trying to do it by hand. Link to comment
troupe Posted June 24, 2017 Share Posted June 24, 2017 I had mine done by Joel Pendergraft at Pendergraft Custom. Works great. Link to comment
1911luvr Posted June 24, 2017 Share Posted June 24, 2017 I was about to have some custom reamers made for exactly this purpose, but I was talked out of it this afternoon. My buddy didn't think there were enough people with the same problem (bought a 1/2x28 thread Spinta barrel and can't find a 9mm JM style comp). I just had some carbide 9mm chamber reamers custom made because the high speed steel ones wear out quickly on melonited barrels, and TiN barrels destroy cutters, so if anyone is interested I can have some muzzle brake reamers made. Sent from my iPhone using Tapatalk Link to comment
Flatland Shooter Posted June 24, 2017 Author Share Posted June 24, 2017 My math is a little different. For me 13/32 works out to 0.40625. We have the same problem 1911luvr. I bought two of the Spinta barrels with the 1/2-28 threads. Now to either find a comp or bore one out. Link to comment
lhoward762 Posted June 24, 2017 Share Posted June 24, 2017 Keeping the new bore concentric to the old bore will be very difficult with a vise and drill press. I've tried and I've ruined. Sent from my SAMSUNG-SM-G900A using Tapatalk Link to comment
Flatland Shooter Posted June 24, 2017 Author Share Posted June 24, 2017 2 minutes ago, lhoward762 said: I've tried and I've ruined. That's what I was looking for. Thanks. Link to comment
T Bacus Posted June 24, 2017 Share Posted June 24, 2017 I've opened two Armalite 5.56 comps to 9mm but used a milling machine to do it. Link to comment
mscott Posted June 24, 2017 Share Posted June 24, 2017 (edited) Drill bits do wander, so if you go that route drill it oversize to be sure of clearance. Also, avoid anything that has been nitrided as that makes them really hard to work with. I just looked around on ebay and there are several 1/2-28 threaded 9mm brakes available. I searched "9mm brake" Edited June 24, 2017 by mscott Link to comment
Aircooled6racer Posted June 24, 2017 Share Posted June 24, 2017 Hello: I would try drilling it out to 0.375 or 3/8 first. That should be enough to clear any 9mm bullet. A lathe works better but a drill press will work also. Thanks, Eric Link to comment
Flatland Shooter Posted June 24, 2017 Author Share Posted June 24, 2017 I thought about drilling to 3/8" but was concerned that with my unsteady hand, it would be cutting it too close. I guess I could give it a try at 3/8" and if that don't work, go one step further and go to 13/32". Again, I don't think the comp will do much if anything for muzzle movement so a tight fit to the bullet is not needed. Just tight enough to cause a little more sound to reach the timer. Thanks. Bill Link to comment
Steve RA Posted June 24, 2017 Share Posted June 24, 2017 Lots of 9mm brakes on E-Bay, lots of them are 1/2X36 but a sufficient # w1/2X28 to warrant looking. Some quite inexpensive as you are looking for a noisemaker more than a brake. Link to comment
BlackBuzzard Posted June 24, 2017 Share Posted June 24, 2017 24 minutes ago, Flatland Shooter said: I thought about drilling to 3/8" but was concerned that with my unsteady hand, it would be cutting it too close. I guess I could give it a try at 3/8" and if that don't work, go one step further and go to 13/32". Again, I don't think the comp will do much if anything for muzzle movement so a tight fit to the bullet is not needed. Just tight enough to cause a little more sound to reach the timer. Thanks. Bill Drill it, then shoot it once. Hand file comp with round chain-saw-blade-type files where bullet touches comp. And repeat until happy. Link to comment
Les Snyder Posted June 24, 2017 Share Posted June 24, 2017 (edited) Flatland... check out McDonald Precision Components... they have an e-bay store... I use their EQ model (comes in 1/2-28 and 1/2 -36) and runs around $25... it is similar to a Miculek, but the slots are slightly oriented to the top of the brake... be sure to click on 9mm for hole diameter Edited June 24, 2017 by Les Snyder Link to comment
Bkreutz Posted June 24, 2017 Share Posted June 24, 2017 (edited) Lone Wolf, Carver,and SJC all make 9mm comps with 1/2 - 28 threads, I just sold a Lone Wolf last week but I still have a new SJC 11 port that I'd sell, contact me via PM if interested. (I switched platforms a while back and don't use screw on comps anymore) Edited June 24, 2017 by Bkreutz Link to comment
1911luvr Posted June 24, 2017 Share Posted June 24, 2017 Keeping the new bore concentric to the old bore will be very difficult with a vise and drill press. I've tried and I've ruined. Sent from my SAMSUNG-SM-G900A using TapatalkThat's why you need a muzzle brake reamer. The tip of the reamer has no cutting edge and rests inside the barrel to keep it concentric while the tapered reamer end makes its way through the hole in the brake until it reaches the max cutting diameter. It's basically like a longer taper chamber reamer and works perfectly. Sent from my iPhone using Tapatalk Link to comment
MegaCleanCab Posted June 25, 2017 Share Posted June 25, 2017 By far the best 9 mm brake I have used is the mbx. I am not certain why you would want to mill one out Sent from my iPhone using Tapatalk Link to comment
Flatland Shooter Posted June 25, 2017 Author Share Posted June 25, 2017 23 minutes ago, MegaCleanCab said: I am not certain why you would want to mill one out Strictly aesthetics. I like the appearance of a JM style comp and I want one in stainless steel to compliment the stainless steel barrel. So far, none located with a 9mm bore and 1/2-28 threads. Bill Link to comment
mscott Posted June 25, 2017 Share Posted June 25, 2017 Bill, If you have found what you like, buy them, send them to me and I'll ream them out on the lathe correctly. No charge for the work as long as you cover return shipping. Link to comment
Les Snyder Posted June 25, 2017 Share Posted June 25, 2017 they can't spell but.... http://www.ebay.com/itm/1-2-28-EQ-Muzzle-Brake-STAINLESS-STEAL-/152049567541 Link to comment
v1911 Posted June 25, 2017 Share Posted June 25, 2017 (edited) Edit: disregard original post. I really liked the looks of the McDonald Precision Components that was recommended. Edited June 25, 2017 by v1911 Link to comment
1911luvr Posted June 25, 2017 Share Posted June 25, 2017 Strictly aesthetics. I like the appearance of a JM style comp and I want one in stainless steel to compliment the stainless steel barrel. So far, none located with a 9mm bore and 1/2-28 threads. BillI was thinking about giving this a try. I have a blue one but haven't tried it yet. http://m.ebay.com/itm/Stainless-Steel-1-2x36-Thread-Short-Compact-Tanker-Style-Muzzle-Brake-for-9-MM-/192158054007?hash=item2cbd833677%3Ag%3ADyQAAOSwdI9Y8FQO&_trkparms=pageci%253A0f3af24a-5970-11e7-be6b-74dbd180aae2%257Cparentrq%253Addf39a0e15c0ab454bf1645efffd2d5c%257Ciid%253A6Sent from my iPhone using Tapatalk Link to comment
Flatland Shooter Posted June 25, 2017 Author Share Posted June 25, 2017 15 hours ago, mscott said: Bill, If you have found what you like, buy them, send them to me and I'll ream them out on the lathe correctly. No charge for the work as long as you cover return shipping. Thank you sir. Link to comment
reshp1 Posted June 26, 2017 Share Posted June 26, 2017 (edited) Nevermind Edited June 26, 2017 by reshp1 Link to comment
littlefish Posted June 28, 2017 Share Posted June 28, 2017 What threads do open pistols use? Should be a lot of 9mm compatible brakes if the threads work. Anyone using a pistol muzzle device on a PCC? Link to comment
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