Bolt failed under 2,500 rounds
Bolt failed under 5,000 rounds
Over 5,000 rounds with no bolt failure
Bolt failed under 10,000 rounds
Over 10,000 rounds with no bolt failure
Bolt failed under 15,000 rounds
Over 15,000 rounds with no bolt failure
Bolt failed under 20,000 rounds
Over 20,000 rounds with no bolt failure
Bolt failed: unknown number of rounds
Kevin S. Boland
Manager, Federal Sales
FN America, LLC
Office: 703.288.3500 x181 | Mobile: 407-451-4544 | Fax: 703.288.4505
www.fnhusa.com
Mine is now a secodary but has 15 k and change it heavy f/n barreled 16 inch. Shoots very well still but I have just f myself I'm sure as Murphy may own it now. Doh.
I'm not doubting the results, but I would be more interested in how they compared to the normal Colt?
*paging markm* how many rounds and what gas length on your digested NiB bolt?
I'm not Mark, but had the same NiB bolt. Lost 4 lugs at less than 1500 rounds. Midlength BCM- not blaming the rifle. Assuming the cause was the NiB coating, as discussed in other threads. Vendor replaced the bolt without issue.
I went 7500 on my DD M4V7 middy.. At that point I replaced the bolt simply as a preventative maintenance precaution. I replaced it with a Colt bolt. There were no outward signs of excessive wear on the bolt, so I put it in my spare parts bin.
I own two carbines with mid length gas systems, one of them I carried on duty. Neither has broken a bolt, but I replace them somewhere between 10,000 and 12,000 rounds.
Train 2 Win
I have yet to "break" an actual bolt. The last bolt that "broke" was due to bad ammo. At that time it had roughly 12-14K on it and it was a BCM 12.5" URG with a suppressor. The bolt itself actually survived, but the extractor was completely done.
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