According to UK media, there are around 11,000 gun deaths per year in the US. Taking into account population that represents, 30 times the UK rate:
Statistics behind US violence
Believe me your background checks don't even compare to ours. It will take a min of 3 months for MI5 to investigate you, including personal face to face interviews with police officers in your own home. Overall, it takes anywhere between 3 months to 1 year to be granted a certificate. As, I also said above, even minor infraction such as speeding offences can lose your licence as it shows a disrespect for the law and therefore a tendency towards criminal behaviour. Personally, I think the latter is a bit extreme, but other examples of what can lead to a refusal - if the police have ever been called out in recent history (last 5 years) to a domestic argument at your home, a military background - they're very wary of PTSD, any psychological condition reported by your doctors report - some are a permanent refusal, others will require a detailed report from a forensic Psychologist who works for the police, a criminal conviction that led to a custodial including a suspended sentence of between 3 months and 3 years results in a 5 year ban on applying for a licence, any sentence of over 3 years is a permanent lifetime ban, there's also the area you live in, certain high crime areas may be deemed too prone to crime to allow the guns to be kept safely so you may be refused simply because of where you live. House alarms and gun safes are mandatory although there's a little leeway with the former although you'll have to prove your home is secure with high security locks etc. Then even if you can pass all the above, you have to show "good reason" to hold a firearm. You can't simply have one because you want one.
Finally having been granted one, the police will inspect your property to ensure you property is fully secure and that there's a gun safe installed to their requirements which is basically out of sight and meeting a set of criteria aimed to prevent it's removal including requiring it to be rawl bolted into a brick wall and positioned so it cannot be jemmied off, plus the safe itself has to meet a whole set of criteria which in the case of a firearm (as opposed to a shotgun), including a separate locking compartment for ammunition which is also subject to safekeeping requirements - you can lose your licence / be prosecuted for having a single round outside of the safe, and many have been.
The UK requirements are here:
https://www.gov.uk/government/uploa...achment_data/file/117794/security_leaflet.pdf Although it's "guidance", you'd be very lucky to get a grant with anything less than an approved and inspected cabinet and would in any event require at least one of the measures.
All automatic weapons are prohibited with the exception of semi automatic rimfire rifles and shotguns (latter limited to 3 shot magazine). All centrefires have to be single shot bolt or pull action although they can be magazine fed.
I'm not saying the UK is perfect, just that the best position probably lies somewhere between the US and UK positions.