The 553 I had for many years and used in a few carbine courses, finally crapped out during a carbine course. Both battery terminals detached while being stuck to both batteries. It was brought back a couple of times, then finally took a dump. Both springs appeared to have taken a set. It was the first RDS on my first, then new, 6920. Both had over 10K rounds fired. According to their web sight, the latest "F" version, has new contacts, a new circuit board which gives 10 times more battery life, and tested to higher G forces in a simulator, similar to firing a 454 Casull.
Last edited by RogerinTPA; 01-09-12 at 15:47.
For God and the soldier we adore, In time of danger, not before! The danger passed, and all things righted, God is forgotten and the soldier slighted." - Rudyard Kipling
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