Canadian eh!
Regular
Different Dealer, SFRC, but mine was fully perfect, not so much as a scratch. Seems a lot of these were not that abused.
Had a Daniel Defense BCG from a non completed project and will run with that.
Colt Canada IUR Cry Babies
- Thread starter bigcoupee
- Start date
Different Dealer, SFRC, but mine was fully perfect, not so much as a scratch. Seems a lot of these were not that abused.
Had a Daniel Defense BCG from a non completed project and will run with that.
r34skyline
CGN Ultra frequent flyer
One shot has LMT FA BCG and yes they are the FA BCG
http://oneshottactical.com/collections/firearm-parts/products/fm-lmtbcg?variant=569433505
http://oneshottactical.com/collections/firearm-parts/products/fm-lmtbcg?variant=569433505
Bought a Socom M4A1 Colt on impulse last year during IRUN guns 10 days of Christmas sale last year. Don't have the heart to cut the fixed front site off so my Vortex Razor 1-6 jm works properly. Ill probably have the socom upper on EE cause my IUR is the way. Maybe a few guys with 6920' s are doing same.
Phat Eagle
CGN Ultra frequent flyer
- Location
- Fraser Valley, BC
There was a recent thread where a Rainier Match BCG was poorly staked, but IMHO that was a one off. All their stuff I've seen in person has been fine quality.
r34skyline
CGN Ultra frequent flyer
Incorrect. The current IUR offerings are 10 inch so that is a potential offering, and the other stubby is a 11.6 inch not 11.7 inch
- Location
- East of Home, West of the Rest
Incorrect. The current IUR offerings are 10 inch so that is a potential offering, and the other stubby is a 11.6 inch not 11.7 inch
Matt said before that the 11.6 is likely what would be released as they don't do many 10 in h builds except for special orders by mil/leo. Unless they get a surplus over run on a special order don't expect 10s.
Please show us in the Mil spec where every individual bolt and carrier is MPI'd. Typically in mass production the QC system will test or inspect a statistically significant proportion of a production run. It is very rare to use 100% inspection rate.
PMI requires specialized equipment and trained personnel which the vast majority of gun makers will not have. What they are most likely doing is sending out a few from each production batch to a third party inspector.
The problem is the mindless adherence and parroting back of a standard that the vast majority of users do not understand. That NEA or any other manufacturer may or may not MPI is somewhat irrelevant. MPI does not guarantee the parts will not fail. All it says is that a statically significant number of parts were found to be free of micro cracks.
Not testing parts does not mean they will fail. All it says is the maker doesn't know for sure if there are any small cracks in the material surface. Parts can fail for lots of reasons and MPI only checks for one of those.
Every Colt, Colt Canada and FNMI M16 bolt must be HPT and MPI. The MILPSEC is clear: 100%. In order to qualify MILSPEC the testing must be performed with detailed records and within access of a government inspector.
Canada adheres to US MILSPEC except where Canadian Specs exceed US - for example accuracy acceptance testing: 2 MOA vs 4MOA MAX.
MIL-R-63997B (AR)
Military Specification Rifle, 5.56MM: M16A2
3.4.4 High pressure resistance. Each barrel assembly and bolt shall withstand the firing of one Government standard M197 5.56 mm high pressure test cartridge conforming to MIL-C-46936. After proof firing, all parts shall be free of cracks, seams and other injurious defects as evidenced by visual and magnetic particle inspection. Testing shall be specified in 4.5.3.1, T III
Table III
High pressure resistance sample: %100
4.7.4.2 Barrel inspection. The barrel assembly shall be magnetic particle inspected in accordance with MIL-STD-1949 utilizing a current of 400 to 500 amperes for circular continuous magnetization. The barrel assembly shall be examined for evidence of cracks, seams and other injurious defects.
4.7.4.3 Bolt inspection. The bolt shall be magnetic particle inspected in accordance with MIL-STD-1949 utilizing standard five turn magnetizing coil with a current of 200 to 300 amperes. Both circular and longitudinal continuous magnetizing with wet fluorescent solution shall be used. The bolts shall be examined for evidence of cracks, seams and other injurious defects.
4.7.4.4 Proof markings. Proof marks and magnetic particle inspection marks shall be applied on barrel assemblies and bolts that have passed this test.
It's actually a pretty simple test to perform. I've been present and observed it in person in several production facilities. Granted, it is expensive to perform this test and record it and audit it for EVERY single bolt. There is a reason why the testing was insisted on and continues to be for all military small arms. Considering that the stoner system is designed to contain over 100,000 PSI in the chamber, extension and bolt, I would feel much better putting my head beside one that was made properly, heat treated properly and 100% verified.
The MILSPEC also goes on to note that ALL components will be made with the materials and processes specified in the TDP with no exceptions. The materials and heat treating are verified by government inspectors and the records audited by ISO and NATO AQAP as well.
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r34skyline
CGN Ultra frequent flyer
Interesting. Thanks for the info. So were these actual releases or something like the IUR we get now?
- Location
- East of Home, West of the Rest
He just posted. Ask him. No shorties released to the public as of yet.
That was actually a very good post by Matt. Not really a combloc gun fan myself. For the most part I think they are cr@p.
However I do has an issue with the use of proofing cartridges. I don't think they provide any useful information and all they really do is over stress the barrel and potentially cause damage to the steel. They are basically pointless and a holdover from 150 years ago when steel quality was spotty at best.
That could only be true with either poorly controlled proof cartridges or poor quality barrel steel.
Scuba tanks are hydrostatically tested every five years to ensure there is still elastic deformation in the tank. If the volume decreases then the elasticity has degraded and the tank could crack and fail. The proof cartridge-MPI combination is essentially the same as hydrostatic testing. If micro-cracks appear from proofing the steel or heat treat is insufficient. With proper steel and proper proof cartridges there is essentially no risk of excessive deformation but the tangible benefit of a proofed firearm.
All HK, Colt, FN, Colt Canada, etc barrels are MILSPEC proofed. Every firearm in Europe is CIP proofed. I have seen thousands done, and fired hundreds of thousands of rounds of 7.62 and 5.56 and .50 cal - all in proofed barrels. I have never seen the slightest problem attributable to the relatively small overpressure of a proof round.
