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[–] barraccuda 0 points 1 point 1 point (+1|-0) ago
While traveling, i mean.
I see piccy rails break off all the time. Simply from the weight of an advanced ruggedized optic straining the bolts during transport.
The strain of recoil may seem comparable to vibration but they have very different stress signatures. Within recoil you have a peak stress and a degenerative harmonic strain cycle. This only lasts for very short periods of time, even if we consider shots as cumulative.
Vertical storage vibration on the other hand has highly variable stress signatures. The vibration wont usually peak at anywhere near the same stress however there can still be incidents of high impact. If i stow my rifle in its rack and go for a combat manoeuvre, i may be in the drivers compartment for 18 hours, moving over terrain like the moon. The prolonged nature of stowage strain leads to work hardening and premature failure of even the hardest mounting bolts and locating dowels.
I have been repairing this and other kinds of repetitive strain damage on rifles for nearly 20 years now. Its real and its worse than recoil, I promise.
Hopefully your failure is a one-off and is isolated to over-torque as commented elsewhere. I cant recommend quality stowage highly enough.
[–] [deleted] 1 point 0 points 1 point (+1|-1) ago (edited ago)
[–] barraccuda ago
Its a generic parts problem. It is very easy to get common sized hardened/tempered bolts. More obscure sizes increase the cost. Thats easy on a single rifle or a thousand gun batch but if we are talking millions of rifles being made then its just too costly.