The good far outweighs the bad, so lets talk about the few downsides (My opinions):
- For the most part, with most models, they're huge in comparison to most other holsters. They stick out farther than most and you can snag the holster on stuff as you pass. This can be alleviated by becoming used to it and compensating for the added mass.
- Its hard to roll across any holster, but its particularly hard to roll across a 6004. Same reasons as above, basically.
- Price and availability can be a downside.
- The SLS Mechanism can get dirty, it can reduce the performance of the holster. I've had mine full of dirt and while it didn't stop working, it did become very sluggish and required more effort to move. Its not an outright problem, per se, and mine seemed to always work again after cleaning it, but one of the principle advantages of a 6004 is it's speed, and having the hood stick can reduce that.
- Backwards ass velcro arrangement. This is minor, but the velcro on the hangar has the hook velcro facing in, so it never seemed to interface with whatever belt I was wearing. Perhaps Safariland belts have hook velcro on the inside of their belts instead of pile like everyone else's.
- The leg straps. Some like them, I don't. My favority straps are the 2" Eagle or Blackhawk style, with the impregnated rubber.
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In retrospect, I wrote a lot about it. Don't get me wrong, I really like the holster and I think they're among the better holsters available. There is no perfect item, though.
Some upsides-
- It stays in the same place. When you reach for your secondary, its there, where you put it.
- Very difficult to accidentally activate the magazine release. On certain firearms, (Specifically HK and Glock models) certain holsters have a tendancy to press the magazine release or allow something you're leaning on to push the release.
- SLS hood is fast.
- Additional mounting points could be an advantage to some. I don't like putting pistol magazines on the strong side, but I've never had to do a shield guy reload, either.
- Protects the gun more than other holsters.
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HTH