TangoFoxtrot Posted June 22, 2009 Report Share Posted June 22, 2009 I recently picked up a BM59 Quick Detachable Muzzle Brake to replace the ugly empty tube Beretta put on the end of a BM62. The problem is on the first shot the spring popped out. I pushed it back in and a few shots later it popped back out. It averaged popping out two or three times every five shots. Am I doing something wrong or is it too old, out of spec, or something else going on? I was using South African battlepack ammo from 1981. http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/IMG_4152Small.jpg http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/IMG_4136Small.jpg http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/IMG_4161Small.jpg http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/IMG_4149Small.jpg Link to comment Share on other sites More sharing options...
bm59collector Posted June 23, 2009 Report Share Posted June 23, 2009 TF I have exactly the same quick detachable (QD) tri-comp. I've never had a problem with mine - once the 'male' connector is installed - the QD is installed with the bayonet lug at 90 degrees to the right looking down the barrel. You need to pull in the QD and turn so the bayonet lug is facing down - this is quite difficult to do as the spring will have quite a bit of resistance and will lock in with the bayonet lug facing down. If you are doing this correctly, then I suspect that the spring clamp has lost some of its tension, these items are close to 50 years old. I'd remove the spring and try roll bending it and put it back and try again - if that doens't work then I'd try contacting Reese Supply and see if they have a replacement - it should be really hard turning it on and locking it in place. HTH Link to comment Share on other sites More sharing options...
TangoFoxtrot Posted June 25, 2009 Author Report Share Posted June 25, 2009 It was turned bayonet lug facing down. I estimate the resistance to turning is easy, not "really hard" so I think you're right about it losing some of its spring tension. The only other thing I can figure is if the extra wide opening for the spring is letting too much gas out. It seems strange it would be open in front where it can let out gas before it gets to the compensator and where it hits the spring. Is this extra opening for the gas normal? http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/Tricomcut.jpg http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/Tricomcut2.jpg Link to comment Share on other sites More sharing options...
bm59collector Posted June 26, 2009 Report Share Posted June 26, 2009 That looks exactly like mine, now there could be another problem where too much gas is coming out and not going down the gas port. Might I suggest that you un-screw with the metric allen wrenct the gas plug. Once un-screwed, take a very small 'L' shaped allen wrench and find the gas port in the barrel and push the allen wrench up into the hole to the barrel - make sure it is clean. This has been a problem on a 59 that I own - the port was mis-aligned. Give this a try - I have not had a problem with my QD tri-comp - good luck - Art Link to comment Share on other sites More sharing options...
UK Armourer Posted July 12, 2009 Report Share Posted July 12, 2009 (edited) Gentlemen, the detachable flash hider / muzzle brake you have is a 'bastardised' version that Reese Surplus sells / sold. The correct version is 2 inches or so longer! I don't know why Reese built these up this way, I suspect they were incomplete models that Reese built up with Infantry fronts and Para rear assemblies or that they were built that way to circumvent some obscure legislation in the US? When I get the opportunity I will post a comparison picture of the 'short' and original versions. I suspect there is a tolerance issue with yours and a lot of gas is venting rearwards 'blowing' the clip out of it's engagement! Cheers, Vic Edited July 13, 2009 by UK Armourer Link to comment Share on other sites More sharing options...
MRJ Posted July 13, 2009 Report Share Posted July 13, 2009 UK Armourer - I' ve experienced a similar problem with the longer detachable Beretta Tri-Comp. I believe that the overall barrel length may be an issue also. Looking back on an old post from 2005, Beretta literaure showed different barrel lengths: Ital and Alpine model 19.32" Paratrooper 18.41" MK 1 and MK 2 17.40" MK 4 20.85" My Berben 62 has a Mk 1 barrel that is 17.4" and it it too short at the muzzle end (ahead of the gas cylinder mounting) to support the para detachable Tri-Comp in recoil. TangoFoxtrot - Can you advise the overall lenght of your barrel? BM59Collector - Isn't your rifle a 19.32" barreled example? Anyone else do much shooting with the detachable Tri-Comp (either style) and know the actual barrel length of your rifle and whether you've had any loosening issues with the Tri-Comp? MRJ Link to comment Share on other sites More sharing options...
UK Armourer Posted July 13, 2009 Report Share Posted July 13, 2009 Guys, here is what is probably wrong... http://i303.photobucket.com/albums/nn152/UK_Armourer/pix1347068671.jpg Note, this setup is a BM62 barrel fitted with a Para BM59 flash hider the barrel should extend around 30 mm beyond the flash hider detachable fitting (the barrel should extend 60 mm beyond the gas assembly threads on a stripped barrel. A BM62 barrel is deliberately shorter than this to stop the fitting of 'military' accouterments! Hence the leaking gas 'blowing off' the spring!!! Also note that this is the 'correct' full length Para Flash Hider! Cheers, Vic Link to comment Share on other sites More sharing options...
bm59collector Posted July 14, 2009 Report Share Posted July 14, 2009 Mike - yes, mine is the longer barrel with no problems Art Link to comment Share on other sites More sharing options...
Pete Posted July 30, 2009 Report Share Posted July 30, 2009 Gentlemen, Hello All! I am thinking about buying the bastardised para version flashhider/muzzlebrake/tri-comp or is it duo-comp for my 69. After reading, I am still intrigued to see if it will work on my 69. Lost out on the regular size tri-comp over on Sturmgewehr and haven't asked Andy from Italy yet. What sayeth the wise BM59 board, Go ahead and buy the bastardised metal accessory? Link to comment Share on other sites More sharing options...
TangoFoxtrot Posted July 30, 2009 Author Report Share Posted July 30, 2009 The closest measurement I can get is to the 17.4" barrel. Here are a couple more pictures: http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/IMG_5159Small2.jpg http://i34.photobucket.com/albums/d138/tango_foxtrot/FM/2009/IMG_5156Small.jpg What would be the appropriate muzzle brake for the shorter barrel models? Link to comment Share on other sites More sharing options...
MRJ Posted July 31, 2009 Report Share Posted July 31, 2009 TangoFoxtrot- I believe you have a Beretta BM 59 Mark 1 barrel. It is too short for the QD Tricomp.If you have a copy of the Beretta four language BM 59 brochure, you can see photos of a paratrooper '59 with the QD Tricomp off and the barrel is seen to protrude thru the QD gas cylinder lock. I believe the QD Tricomp needs a longer than 17.4" barrel to stay attached under recoil. Your BM 62 gas cylinder doesn't have a spindle valve for grenade launching, The Mark 1 doesn't have grenade launching capability either. There is a 5" Tricomp which doesn't have grenade launching gooves. This Tricomp looks exactly like those illustrated on the Mark 1. I'm not sure if RSI or Andy have them but they might. I think your '62 would look great dressed as a Mark 1. MRJ Link to comment Share on other sites More sharing options...
Pete Posted August 3, 2009 Report Share Posted August 3, 2009 MRJ, How about the 69 model? I believe, I may be wrong, aren't the barrels the same length? So, the Reese Bastardized Tri-Comp wont' work for my 69. I should look for the flash hider with just the holes at the end, then. THANKS TO ALL FOR YOUR KNOWLEDGE!!! Link to comment Share on other sites More sharing options...
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