11-30-2011, 05:12 AM
Jaywalker Wrote:Has anyone fired one upper and barrel to a high round count? I'm thinking 5,000 or 10,000 rounds.
If you have comments on what you've had to replace, that would be interesting,
On 5.56 guns, the maintenance schedule calls for ejector and extractor spring replacement between 2000-4000 rounds, and recoil spring replacement at 10000 rounds, or when it fails a minimum length test. Who knows what these benchmarks are for the Grendel, but I keep spares on-hand for all my blasters as a rule. I also like the grip cores of the Magpul MIAD and MOE grips, where you can keep an extra bolt, firing pin, extractor assembly, firing pin retaining pin, etc.
Some prefer to just drop in a whole new Bolt Carrier Group and recoil spring at 10k. I distribute the high volume over several carbines, so I have to pay more attention to my precision guns for round count. Either way, keep a log boo on all your rifles so you know how many miles are on the oblastmeter.